Close

Coin Cell Challenge Entries

Learn more
97 projects
8.1k
63
54
A low cost ultra-low-power small-sized high accuracy temperature logger for use in scientific research.
Project Owner Contributor

Low-cost/power/size temperature logger

nikosNikos

1.7k
12
16
why stick to CR2032 when you can have a CR200320!! Powering your Anet A8 3D printer with a coincell
Project Owner Contributor

MegaCoinCell

megacellmegaCell

10.9k
34
39
A pranking device to annoy your friends... or perhaps an entire college campus.
Project Owner Contributor

ATTiny Low Power Prank

joseph-primmerJoseph Primmer

17.7k
10.6k
70
A smart sensor Node to trigger an action on a smartphone each time a physical change is detected (temperature, displacement, click...)
Project Owner Contributor

Triggy - Sensor Node for Life Automation

vinchVinch

998
7
4
ESP8266 + Coin Cell + Match Box = Dash Button
Project Owner Contributor

Match Box ESP Dash Button

hagen-fritschHagen Fritsch

1.4k
15
20
Touch controlled light-up PCB business card, no microcontroller required!
Project Owner Contributor

Analog Touch Control Business Card

sunnySunny

1.3k
5
9
Using a CR2477 coin cell and two 350 farad capacitors, I manage to get a loaded Lionel train to make one circuit around the Christmas tree.
Project Owner Contributor

Coin Cell Train

mike-rigsbyMike Rigsby

15.9k
644
113
wearable UV Index & weather sensor
Project Owner Contributor

UV-badge

x-labzx-labz

4.5k
22
22
In this project I will make an indoor gardening system to take care of my sweet plant and its beautiful flowers
Project Owner Contributor

Arduino Indoor Garden

diy-guy-chrisDIY GUY Chris

2.5k
21
25
Atmel Attiny 85 + 6/4 RGB LEDs + analog sensor + battery 3v
Project Owner Contributor

Reactive Jeweleries

maxim-krentovskiyMaxim Krentovskiy

3k
18
28
An annoying, tiny, rickrolling friend
Project Owner Contributor

ATtiny10 rickroller

shlonkinshlonkin

7.2k
81
65
Low Power Temperature/Humidity Monitoring
Project Owner Contributor

Gecko Node - Wireless Low Power Sensor

maxkMax.K

1.2k
6
6
A battery powered, periodic infrared beacon for a geocaching puzzle
Project Owner Contributor

Low power IR beacon

piotrb5e3piotrb5e3

324
6
3
The goal of this project is to design sensor, actuator & alert circuits that can be woven into clothing and be powered by coin cells.
Project Owner Contributor

WeavCoin - coin cell powered clothing

natalia-mykhaylovaNatalia Mykhaylova

8.2k
95
110
Ever since I have my own company I wanted to have a PCB business card. What not add an OLED display to it?
Project Owner Contributor

Electrocard

michael-teeuwMichael Teeuw

4.9k
43
42
The Micro TV-B-Gone is based off of Adafruit's original TV-B-Gone kit, except made to be as small as possible, using an LIR-2032 coin cell.
Project Owner Contributor

Micro TV-B-Gone

nicholas-junkerNicholas Junker

26k
235
216
A handheld game console programmable with (Micro/Circuit)Python.
Project Owner Contributor

µGame

dehipudeʃhipu

618
3
3
Hateful electrons with fearless mosfets join forces against elements
Project Owner Contributor

picoSTING

robert-matejaRobert Mateja

1.1k
18
28
Collection of blink SMD soldering kits
Project Owner Contributor

Blink Coin cell toys collection

bobriciusbobricius

353
3
3
A wireless node to detect door opening.
Project Owner Contributor

WIRELESS_DOOR_SENSOR

texanetexane

322
4
4
I'll be sharing with you my experience of how i started from a simple idea to a finished product
Project Owner Contributor

VibClock

foxmjayFoxmjay

292
2
4
Busy Bee playing music
Project Owner Contributor

BBsynth

jacquesJacques

190
1
1
Really simple light-up pop up card, using 2 LEDs, copper tape and a CR2032 coincell battery.
Project Owner Contributor

Quick LED Birthday Card

amandarAmandar

1.9k
14
12
Tracker using ATmega with added EEPROM Storage capabilities
Project Owner Contributor

TRACKER

madivakmadivak

failed to load.

By using our website and services, you expressly agree to the placement of our performance, functionality, and advertising cookies. Learn More