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Coin Cell Challenge Entries

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97 projects
480
3
3
Hateful electrons with fearless mosfets join forces against elements
Project Owner Contributor

picoSTING

robert-matejaRobert Mateja

4.4k
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

6.8k
81
65
Low Power Temperature/Humidity Monitoring
Project Owner Contributor

Gecko Node - Wireless Low Power Sensor

maxkMax.K

468
464
1
A keychain sized gamer based on the attiny85 and a single coin cell battery.
Project Owner Contributor

TinyPong

saulSaul

1.1k
2
3
A Pi Zero and tiny display powered by a coin cell.
Project Owner Contributor

coin2pi

mincepimincepi

63.7k
330
286
Multi-year always-on LED replacements for gaseous tritium light sources
Project Owner Contributor

TritiLED

ted-yapoTed Yapo

531
256
5
A BCD binary clock that fits inside of a jar
Project Owner Contributor

Binary desk USB jar clock

marius-taciucMarius Taciuc

221
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

6.5k
40
45
Just a simple compact tetris clone using an ATTINY85 and a cheap OLED display.
Project Owner Contributor

pockeTETRIS

dombeefdombeef

2.9k
18
28
An annoying, tiny, rickrolling friend
Project Owner Contributor

ATtiny10 rickroller

shlonkinshlonkin

8.6k
48
42
Wait overnight and do your welding job!
Project Owner Contributor

Coin cell battery powered spot welder

jaromirsukubajaromir.sukuba

323
3
3
A wireless node to detect door opening.
Project Owner Contributor

WIRELESS_DOOR_SENSOR

texanetexane

5.4k
40
36
Arcade games on the Micro:bit
Project Owner Contributor

Micro:Boy

dehipudeʃhipu

3.7k
26
37
Display falling tetris blocks on a oled screen made into an ear ring. It's powerded by a coin cell.
Project Owner Contributor

oled earrings

danielDaniel

680
8
7
This tiny low-power wireless module can run on a coin battery for a looong time.
Project Owner Contributor

Cloony wireless module

martin-hubMartin Hub

1.2k
7
7
A quite persistent little blinker
Project Owner Contributor

Blinky_40

robert-matejaRobert Mateja

24k
235
216
A handheld game console programmable with (Micro/Circuit)Python.
Project Owner Contributor

µGame

dehipudeʃhipu

7.2k
5.6k
57
A charlieplexed 20 LED blinker with ATTiny45. Space efficient daisychained LED placing with shared anode/cathode soldering pads.
Project Owner Contributor

LED ring

jens-haukeJens Hauke

142
1
0
My twist on the classic LED Dice kit. Yes, I resort to cheating to beat the kids!
Project Owner Contributor

Cheater Dice

nascoNASCO

9.9k
120
116
A Wordwatch using a 11x10 charlieplex matrix.
Project Owner Contributor

Word Wristwatch

cfCF

1.2k
4
6
How many screws can you drive with a CR2477?
Project Owner Contributor

Coin Cell Power Screwdriver

ted-yapoTed Yapo

8.1k
97
115
An Arduino-based watch using 97 LEDs to show the time.
Project Owner Contributor

LiquidWatch

cfCF

550
5
5
A coin-cell powered ATTiny board with popular peripherals (USB, potmeter, slide/tact switch, piezo buzzer, LED) to jump-start tiny projects.
Project Owner Contributor

Duinothrowie

gregorGregor

8k
41
36
A small railgun , augmented with neodymium magnets and powered from a single LIR2032 rechargeable coin cell battery.
Project Owner Contributor

Coin cell powered railgun

consciousfleshconsciousflesh

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