Pcb project 555 timer jobber

Hei, jeg holder på med et prosjekt som handler om å lage et enklere grensesnitt for eldre mennesker slik at de kan bruke mobilbank app på mobilen. Det blir lettere også for dem å holde oversikt over deres økonomi og ta imot teknologi som de ikke har så kjennskap til. Jeg vil gjerne at prosjektet lages i figma eller Adobe...handler om å lage et enklere grensesnitt for eldre mennesker slik at de kan bruke mobilbank app på mobilen. Det blir lettere også for dem å holde oversikt over deres økonomi og ta imot teknologi som de ikke har så kjennskap til. Jeg vil gjerne at prosjektet lages i figma eller Adobe xd så fort som mulig, helst ferdig iløpet av dagen idag eller imorgen på formiddagen. Prosje...

Vi trenger en Copywriter, som kan korrekturlese utkast vi lager for forskjellige type softwareperodukter. Vi ønsker umiidelbar oppstart. Ca fire timer jobb i uken.

Vi trenger noen som kan hjelpe til å gå turer i områdene i Oslo Vest. En som har ledig tid på dagtid mandag til fredag. Du nå være hundevant og like å være ute i allslags vær. Du kan jobbe 3-5 timer hver dag. Trenger hjelp fra september til og med desember. Mulig ennå lenger hvis det er ønskelig. Førerkort er ønskelig, men ikke et absolutt krav.

trenger regnskapshjelp noen timer i uken. You must be advanced users of application "Fiken" accounting system.

Hei, Jeg trenger min CV å være oversette fra Engelsk til Norsk så fort som mulig. Tror jeg, det trenger bare en til to timer arbeid. Jeg har utdanning som Ingeniør og hvis du har Ingeniør bakgrunn, da det vil være bedre. Min budsjett er 17 USD (150 NOK) Bare ønsker å ta kontakt med norske innfødte høyttalere som har flytende norsk kompetanse. Mvh, Debayan

RepLab er en reparasjonstjeneste for mobiltelefoner/ nettbrett og høreapparater. Vi vil ha laget en plugin i WordPress som tar hånd om booking av timer på våre nettsider. Kunden skal samtidig få vite pris på reparasjonstjenesten (prisliste) Han skal også få vite hvor lang tid han må vente på å få det gjort. (20 - 60 min) Tilbakemelding til kunde via SMS eller epost om hans booking. Det skal lages en arbeidslogg på hver kunde, der man enkelt kan se hva som er gjort av evt. reparasjoner på enheten tidligere. I fra loggen/ kundebildet skal det blant annet kunne skrives ut tickets til kunde. Altså en kvittering på vår kvitteringsskriver på at kunden har levert inn sin enhet for ...

Jeg trenger et plugin system der ansatte kan logge seg inn og stemple inn timer på et gitt sted. Er faste steder som man kan velge mellom, trenger og få skrevet ut lister for alle eller et gitt arbeidssted for regnskap. Helst enkelt og sikkert..

Vi trenger en person som vil komme til oss i Oslo, og i løpet av noen dager vise oss tips og triks i WooCommerce. Vi tenker oss 3 timer pr. dag i tids

Hei. Jeg driver et lite Content-byrå, og kunne gjerne tenkt meg å tilknytte meg en tekstressurs som hjelper meg når jeg trenger det. Akkurat nå har jeg tre whitepapers/mini-guides som jeg holder på å skrive, og har lagt ut et oppdrag for hver av dem. På den måten kan jeg teste noen tekstressurser ut. Dette oppdraget gjelder whitepaperet: "R...den måten kan jeg teste noen tekstressurser ut. Dette oppdraget gjelder whitepaperet: "Regler for ferie og fravær". Det finnes ganske gode kilder på nett, så dette whitepaperet tenker jeg vil være relativt enkelt å skrive. Dette whitepaperet vil nok være et sted mellom 3 og 5 sider lengdemessig, med en innledning, ulike avsnitter o...

Hei. Jeg driver et lite Content-byrå, og kunne gjerne tenkt meg å tilknytte meg en tekstressurs som hjelper meg når jeg trenger det. Akkurat nå har jeg tre whitepapers/mini-guides som jeg holder på å skrive, og har lagt ut et oppdrag for hver av dem. På den måten kan jeg teste noen tekstressurser ut. Dette oppdraget gjelder whitepaperet: "Dette ...dokumentet står det noen stikkord og tabeller, men du må selv finne ut mer om hvordan toppbedriftene jobber med kundetilfredshet. Noe står nok på nettet, og dersom du er supertøff kan du også kontakte noen av bedriftene og spørre. Whitepaperne skal være 4-6 sider, med en innledning, ulike avsnitter og en konklusjon, og til slutt kilder...

Arbeidsoppgaver Vi søker frilansere (Clickworkers) som kan skrive eller korrekturlese frie tekster, slik som for eksempel produktbeskrivelser, beskrivelser av byer eller hotellanmeldelser. Alt du trenger er en datamaskin med internettilgang. Du kan fritt velge hvor mange timer du ønsker å arbeide og hvor du vil arbeide. Om oss er en crowdsourcing-plattform. Våre klienter driver større prosjekter som blir fullført av frilansere som vi kaller clickworkers. Vi deler opp hvert oppdrag i flere småoppdrag og betaler clickworkers til å fullføre disse oppdragene. Ønskede kvalifikasjoner Perfekte skriftlige norskkunnskaper er nødvendig. I tillegg er gode språkkunnskaper i enten engelsk eller tysk n&os...

Jeg ønsker å få laget en app. Ønsker å mota tilbud fra noen som kan hjelpe meg med å lage denne appen best mulig. Den må kunne telle timer på hver enkelt sosiale medie du er inne på daglig. Ønsker ikke å si for mye før jeg finner en jeg kan samarbeide med.

I am looking for an experienced Electronics Engineer, well-versed in using Altium Designer, for a series of projects that demand proficiency in a wide array of electronics, specifically focusing on Microcontroller integration, PCB layout and USB connectivity. Key Aspects: - PCB Layout design - Microcontroller implementation - USB Connectivity solutions Additional Requirements: - Expertise in Circuit design - Experience in selecting suitable electronic components - Signal analysis knowledge - Ability to conduct thorough testing procedures This project demands an adept understanding of electronic systems and circuitry meant for consumer electronics. Candidates with a solid track record in crafting and refining consumer electronic designs are strongly preferred. You...

...Then I cloned the "depthai-python" git hub repository 7. Then I ran the install requirements (still in the environment) - python3 Finally, I tried to run the example code ColorCamera/rgb_preview.py. However, I would run into the error, "RunTimeError: No avaible devices." Originally, I thought this was a watchdog error since the it said "RunTimeError" but the watchdog timer only activates after 15 seconds and the terminal returns this error in less than 5 seconds. On Luxinos's documentation I noticed that if the camera is unable to connect to the DHCP server it has a fall-back IP Address, 169.254.1.222. Using my computer, I was able to run a script that gives me the IP address of the camera and I noticed the two matched. It also mentions &qu...

...Then I cloned the "depthai-python" git hub repository 7. Then I ran the install requirements (still in the environment) - python3 Finally, I tried to run the example code ColorCamera/rgb_preview.py. However, I would run into the error, "RunTimeError: No avaible devices." Originally, I thought this was a watchdog error since the it said "RunTimeError" but the watchdog timer only activates after 15 seconds and the terminal returns this error in less than 5 seconds. On Luxinos's documentation I noticed that if the camera is unable to connect to the DHCP server it has a fall-back IP Address, 169.254.1.222. Using my computer, I was able to run a script that gives me the IP address of the camera and I noticed the two matched. It also mentions &qu...

I'm seeking an experienced PCB designer to develop a custom ATSAMD21 Micro PCB board. - A USB interface, specifically pin header for most GPIO and USB D lines. - 10+ GPIO pins required for this project. The ideal candidate should have prior experience working with ATSAMD21 Micro PCB boards as well as an understanding of USB interface technology. Proficiency in board design and a keen eye for detail will be crucial for success in this job.

I need an expert in Printed Circuit Board (PCB) design to assist me in manufacturing an electronic product that falls under the category of consumer electronics. Key Requirements: • Comprehensive knowledge in PCB design • Expertise in electronic product manufacturing • Experience in Consumer Electronics sector In particular, I am interested in those with a versatile portfolio, showcasing their ability to work with various complexity levels of PCB design. Although the specific complexity level of this project is not yet final, I am looking forward to discussing it during our project discussions. This project is an excellent opportunity for those who are passionate and experienced in the consumer electronics field. Let's...

...USB-C connectors - One PCB should have a USB-C female to USB-C male connector - The other PCB should have a USB-C female to USB-C female connector - The male connector needs to be mounted at 90 degrees to the board - One female connector needs to be mounted at 90 degrees to the board - Both boards should support data transfer and device charging - Both boards when oriented should connect to each other with the 90 degree connectors forming a Z shape. - No additional components or features are required. Ideal Skills and Experience: - Proficiency in PCB design and layout - Experience with USB-C connectors and associated protocols - Ability to design for both data transfer and charging - Knowledge of mounting connectors at angles on PCBs The final deliverables for th...

I'm loo...simulation and PCB design project. - I require assistance primarily with circuit design, schematic capture, and component selection and placement. - I already have specific electronic components in mind for this project, so I would need your expertise in helping me integrate these into the design. - The primary purpose of the electronic device I'm designing is for control and automation. Ideal Skills and Experience: - Proficiency in Proteus for electronic simulation - Proficiency in KiCad for PCB design - Experience with circuit design, schematic capture, and component selection and placement - Previous projects focusing on control and automation systems would be a bonus. Please let me know about your background and experience in this a...

Update schematics, BOM and PCB. Create Panel.

We are currently working on an exciting project and are in need of a freelance service for the development of an ESP32-based solution. PART OF THE PROJECT AND SOME PARTS OF ITS CODES ALREADY BEEN DONE. I'm seeking a talented IoT engineer for the development of an industrial Internet of Things (IoT) monitoring and control device. This project will focus on managing and controlling energy consumption and environmental aspects at a property-level precision in an industrial setting. Key Job Responsibilities and Deliverables: - Design and develop an IoT device capable of monitoring, controlling and analyzing energy consumption and environmental management for an entire property. - Implement IoT solutions with MQTT, AWS, LoRaWan & Datalogger technologies. - Estab...

We are working on a power converter board and looking for an expert in MCU stm32. We are using the stm32G474ret6 and having several issues that we are not being able to explain . The main issues are : startup state of MCU systick clock for hal_delay non functional Debugger resetting MCU in middle of operation code not stored in memory after powercycle . We are looking for somebody that is v...the stm32G474ret6 and having several issues that we are not being able to explain . The main issues are : startup state of MCU systick clock for hal_delay non functional Debugger resetting MCU in middle of operation code not stored in memory after powercycle . We are looking for somebody that is very used with stm32 MCU and know about electronic schematics and circuit for mcu integration on ...

As the driving force behind a key industrial project, I'm currently in the market for a talented and meticulous PCB board developer. Your knowledge of the Internet of Things will be challenged, with the board needing to achieve: - Seamless Wireless connectivity - Comprehensive Sensor integration - Precise Data logging capabilities What's the end goal? Enhanced industrial monitoring. This board will lie at the heart of our operation, gathering and transmitting valuable, real-time data back to us for accurate monitoring and decision making. The must-have communication protocol for this board? WiFi. It's a non-negotiable, ensuring our board remains connected and efficient. If you're well versed in PCB design, experience with WiFi connected devices...

I'm in need of an Electronic Technician who can design a PCB board. I would provide the schematic diagram drawing, dimensions and a bill of material of all the components. All I need is the PCB design in a format that I could send to print. Simulation is a plus. Key Responsibilities: - Designing and developing the PCB board. Ideal Candidate: - Proficiency and experience in designing PCB boards. - Understanding of electronic devices and their components. Please include a detailed project proposal in your application.

I need Altium Designer expert to review the schematic/PCB, change the dielectric material to Rogers RO4003C, resolve DRC issues, correct any issue in the PCB , and ensure that the PCB is manufacturable. The designer should also generate the necessary files required for manufacturing and assembly. The PCB is already routed, but some modifications may be required. The PCB is a simple 6-layer PCB with 2 through-hole connectors, and all other components are surface-mount with 2 or 3 terminals. All changes should be documented in detail.

...to help me design a schematic and PCB layout for an electronic personal gadget. It's essentially a miniaturized, spherical device. Your work will be key to bringing this gadget to life. I need a skilled engineer to design the schematic and PCB layout for a compact video projector encased in a spherical, medical-grade silicone housing. Here are the specifications for the PCB: - The PCB should be circular. - It must have a maximum diameter of 15 millimeters. - The memory should be at least 10 MB, ideally 16 MB, to ensure ample storage. - The memory needs to be capable of supporting PDF files, though text files or images are acceptable alternatives. - The projector should be able to display content like a standard projector, including the ability to pr...

I'm in need of an experienced electronic embedded system developer to create a cutting-edge blood pressure monitor medical device. The project involves schematic, pcb, firmware development, as well as algorithm creation, testing and monitoring. Additionally, the device should be able to interact with an Android app for display and control purposes. Key features: - Bluetooth connectivity: The device should be able to connect to other devices wirelessly. - Real-time monitoring: The device should provide continuous data so that users can monitor their blood pressure in real-time. The Android app should include: control device and viewing data with scheduling. Regulatory Standards: - CE (Conformité Européenne): The device must adhere to European standards fo...

Construir un circuito PCB que: disponga de 2 entradas de audio stereo (Audio_In), para poder analizar y determinar continuamente, cual es el nivel máximo de volumen conjunto durante 30 segundos. Si dicho nivel máximo es SUPERIOR a un nivel establecido "manualmente" en el circuito (con un potenciómetro), entonces las salidas de audio (Audio_Out) del circuito deberían pasar a cero (Mute), en caso contrario las salidas de audio stereo deberían ser idénticas a las de entrada. (Audio_Out=Audio_In)

I'm seeking a skilled electronics engineer for the development of a basic single-layer PCB prototype. Here are the essentials: - This circuit creates a pulse amplitude modulated signal which is amplified at high power. The signal is genrated within the circuit so no user input is required. - This project has been worked on before and an added varible resistor and mosfet will be needed as well as the most important part which is power management which can be done with component selection or circuit alterations. - The purpose is a prototype development, which means you'll be instrumental in bringing my concept to life and preparing it for eventual manufacturing. - The PCB design will incorporate analog components, so expertise in working with these compon...

We are seeking an experienced PCB designer to develop a custom printed circuit board for a Raspberry Pi 4 Model B application. The project requires integrating specific components and ensuring the design can be enclosed within a standard industrial box. The successful applicant must have experience with power management and GPIO pin utilization. Key Requirements: - Experience with Raspberry Pi designs and GPIO pin functions. - Ability to integrate electronic components such as 5V relays into the PCB with high precision. - Familiarity with standard industrial connectors and terminals. This project aims to create a highly functional and reliable hardware system. Only applicants with a strong track record in custom PCB designs and the ability to work to e...

We're looking for someone who can make a few changes to a PCB using Altium Designer and has experience and an education in electrical engineering. It would also be an advantage if you are familiar with the ESP32C3, creating circuits is not a problem for you, but it is also not a problem for you when troubleshooting, especially in the RF area. Out of discretion, we do not want to post the exact requirements publicly. However, we will send this to you in advance to discuss working hours and price if the requirements match your profile. Thank you

As an entrepreneur, I'm seeking a expert to assist with website design, membership site setup and sales funnel creation for my upcoming business. Here are the specifics of my project: - Website Design: The design would cover approximately 1-5 pages. The primary focus would be on crafting a visually appealing, user-friendly and professional-looking website. - Membership Site Setup: I intend to set up a membership site with a basic structure, including a few different levels of membership and resources. Understanding the nuances of membership site setup within Wordpress is a must. - Sales Funnels Creation: I need a sales funnel that converts effectively. Your previous experience in creating and implementing high-performing funnels is highly desirable. specifically: 1. WEBSI...

...incorporate features such as RSVP management, a photo gallery, and a countdown timer. Key elements we envision for the website include: - A sleek and appealing design: Our preference is for a romantic and elegant look, with the use of bold and vibrant colors to bring the site to life. - RSVP Management: We need a well-functioning RSVP system that allows our guests to confirm their attendance and provide essential details. - Photo Gallery: A beautiful photo gallery that can display our engagement photos and other important moments leading up to our special day. - Countdown Timer: A countdown timer that builds anticipation and excitement among our guests as they await the wedding day. The ideal candidate for this project would have: - Extensive experience in ...

I require a professional with expertise in Electrical Engineering or more fields to design schematic and PCB layout for a mini videoprojector, and a sferic case which I can print.   What I need for this PCB:
- Must be round
- Must have max 15 milimeters diameter (1,5 centimeters)
- The components used should be good quality
- Must have minimum memory capacity of 10 MB (I think 16MB it's more than sufficient)
- The memory must support pdf or text (pdf preferably, but text is also ok or worst case images)
- This minimalistic videoprojector must have an option to project this pdf/text/img in any way (like a normal projector on walls, it's ok if will be smaller projecting final image; or like kids toys, where you are looking into a magnifier and see images)
...

As someone passionate about electronics, I am looking to create a PCB layout specifically for large, rectangular, tri-color LED display panels - a design that goes from scratch. Here’s exactly what I am looking for: Requirements: - PCB Design expertise with a keen eye for detail. - Handle the complete PCB layout design process, starting from scratch. - Apply knowledge of tri-color LED panel technology in PCB design. - Assist in producing a PCB layout tailored for large, rectangular shaped LED panels. Skills & Experience: - Experience in PCB design & layout. - Hands-on experience with LED technology, specifically tri-color panels. - Proven track record of designing PCB layouts from scratch. - Excellent understanding of var...

I'm seeking a professional with expert knowledge in precision analog design. Goal of the project is a small prototype board to measure K type thermocouple elements - with two different approaches. Additionaly obvisouly a MCU will take place - as well as RS485 communication. Absolut main aspect is an accurate (in sense of stability, low noise and absolute value representation) K thermocouple element measurement. Two approaches are forseen - using the high precision MAX31856 as well as the AD8495 in conjunction with a 20-bit SAR and 24-bit SigDelt ADC. Apart from the ADC proposition the project comprisis of a full circuit and PCB creation. Additionaly also the needed firmware for the respective communication (over SPI) shall be properly implemented (well structur...

I'm in need of a PCB design for prototyping purposes. The board's complexity is a double-layer one, and its dimensions are very small, up to 2 inches. The PCB design must be suitable for prototyping, so it should be well-structured, compact and efficient. Key details: - MCU: ESP32 - Interface: Wifi/Bluetooth - Number of sensors to be interfaced: 4 - Type: Prototyping - Complexity: Double-layer - Size: 40mm dia Ideal skills for this project: - PCB design experience, specifically in prototyping - Proficiency in designing double-layer boards - Ability to create compact and efficient designs - Familiarity with small form factor PCBs.

...electronics engineer to develop a circuit board with a microcontroller with ethernet connectivity, POE power and addressable LEDs, with the design done using EasyEDA software to be fully manufactured by JLCPCB (or equivalent). The core functionality of this project focuses on power management. Your skills and expertise should include: - Comprehensive understanding of EasyEDA software (can take other suggestions) - Proven experience in multi-layer circuit board design - Extensive knowledge in PCB design for power management This project requires intricate knowledge of these areas, so please only bid if you're confident in your ability to deliver. Looking forward to working with experienced and dedicated specialists. Proven portfolio related to power manage...

I am looking for a specialized electronics engineer with a proven track record in printed circuit board (PCB) design, specifically tailored to handle sensor signals. In particular, the PCB should receive WiFi-based signals from sensors monitoring temperature, pressure, and vibrations. The scope of the project is as follows: 1. **Sensor-PCB Communication:** The maximum distance between the sensors and the PCB would be less than 10 meters. A strong understanding of short-range wireless communication is essential. 2. **Durability:** The PCB design needs to prioritize durability. Please demonstrate past work in creating robust and long-lasting PCB designs. 3. **Equipment Performance Tracking:** The primary purpose of the sensor signals is ...

100 Tons Weighbridge controller PCB design with RFID

100 Tons Weighbridge controller PCB design with RFID

I'm looking to upgrade my current ESP8266 controller to an ESP32 C3 Mini controlle...Mini controller. I am primarily interested in freelancers with specific experience in this upgrade. Here's what I need: Requirement -1 : 1. Update existing Master Controller board based of ESP8266 to support ESP32 C3 IPEX/ (EasyEDA PCB design) 2. Retain GPIO connections and other circuits and components. 3. Ensure the position of LEDs, buttons and interfaces are as in current design 4. Ensure that the device supports handling loads upto 3A total without any heat with each port support upto 1 A Requirement -2 : 1. Redesign existing Zone Expander PCB board from Eagle to EasyEDA 2. Add LED Power indicator option 3. Ensure that the Expander handle upto 3A without any heating and ea...

I'm in need of a talented PCB designer who can assist in creating a simple but effective PCB for a power supply. Key Responsibilities: Need a Small PCB which will contain NodeMCU, 4 Relay, AC to DC 5v. This board is for home automation project which will connect through WIFI, RF and control all home appliances. Ideal Skills: - Proven experience in PCB design. - Understanding of basic power supply principles. - Proficiency in PCB layout softwares, like Altium or Eagle. This is a straightforward project suitable for a skilled PCB designer looking to take on a quick gig.

I'm in need of a PCB design. The primary purpose of this project is for prototyping a simple layout. Key Requirements: - Design a single-sided PCB layout - The size of the PCB should fit in the small area you see in the attached photo, so it’s a unique shape. - There will be two automotive LEDs that connect to the PCB, so 4 wires, however, the 2x ground works be best connected and then the positive for each light. I’m considering using a magnetic Pogo connector for the output and it would need 4 connections. You’ll see in the second image, the wiring is for an indicator/brake/running led. So the brake/running are connected and it works as such. The running light is a dimmed red LED, then when the brake is pressed the red light br...

I am looking for a skilled PCB designer to create a prototype that fits within a medium-sized, 2 to 4 inch space. This PCB should be tailored to contain an Arduino Mini and a 12V to 5V buck converter, with 3 pin and 2 pin JST GH connectors. The configuration of components on the PCB should follow a clustered arrangement to maximize space efficiency. This job does not require mass production capability at this time, with the primary focus being on creating a single prototype. Ideal candidates should have experience with Arduino components and compact PCB design.

I'm seeking an experienced hardware engineer to design a robust PCB which will fully support my Raspberry Pi 3 Model B+. This PCB is planned to be a part of a control system. The main requirements for the project are as follows: • Full Raspberry Pi 3 Model B+ compatibility support - Your design should take full advantage of all the features of this model. • Control system orientation - The PCB down the line will be used as a control system, all design decisions should keep this in mind. This project requires that the PCB has a 110/240 V input and have a 5V Output and 8 Relay Out of 10V. Some basic requirements for candidates: • Strong knowledge in Raspberry Pi and PCB design is preferred. • Prior experience with ne...

Im a prop builder and I'm in need of a skilled Arduino programmer to assist with a stepper motor project. I have an Arduino Uno and a CNC shield, and need help in programming them to make my stepper motor move back and forth at different times. Im building the opening scene can opener in Back to the Future. marker 2:20 This is for my cat Daisy, I want to make an automated can opener because Back to the Future is my all-time favorite movie and it would be so fun to make and have. I started 3d modeling it back in college for a project but COVID ruined my class and never got to learn Arduino... I have pretty much all the pieces and mostly figured out how everything should work. The key requirements are: - Configuring Arduino Uno and CNC shield to

I hope you are good. I have read your description carefully and understand everything. I’m Electronics engineer who have 25 year experience on analog design, renewable energy, power electronics, motor control, microcontroller coding and PCB design. I have used Arduino, PIC, MSP430, C2000 and STM32 for 8 years. I have developed several codes by using their IDE and compilers. I know all principles of them. And I can do microcontroller simulation by using Proteus. Proteus have microcontroller model and peripheral components to simulate the code. The code can be debugged by using COF file also. Simulation result is same with real time application.

...with speedcubing, rubiks cubes and/or stopwatch. It will be used as an icon, so it should be self explanatory without any text below/above logo. I'm looking for an amazing designer who understands aesthetics. The project is to create a stunning logo for a mobile app that will be used on Android and iOS devices. It should have strong connection to rubiks cube App is focused around Rubiks Cube and speedcubing in general. Key things to know: - app name is Cube Rivals - focused on Rubiks Cubes, algorithms, - key selling point is that it is going to be a speedcubing timer/stopwatch - second key feature is "rivalry" mode, where users can compete with each other In attachments you can find a video of whole app and one screen that will help you see the col...

I need a single-layer PCB designed for a consumer electronics product. It involves the integration of sensors and a timer. Basically,, a very small circular pcb board that has 12 micro led lights. And all lights turn on when double tapping was detected, then last about 10 seconds then lights turned off. Using two 1.5v coin batteries. Just that, nothing less and nothing more. Oh, but it has to be very small. Approximately 30mmx30mm. Thank you Regards