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Coin Cell Challenge Entries

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97 projects
4.3k
51
47
A credit card size Wireless Temperature & Humidity Node power by CR2032 Coin Cell
Project Owner Contributor

Wireless Temperature & Humidity Card

will-whangWill Whang

633
4
2
A small circuit inside an enclosure, both optimized to resist a hit to the ground
Project Owner Contributor

Airsoft sonic grenade

eduardEduard

415
1
1
A clock with spiritual messages
Project Owner Contributor

Cronos

marius-taciucMarius Taciuc

315
6
12
Here I have a Maker Gummi Bear that can be worn as an electronic badge. It contains LEDs and is powered by a single coin cell battery.
Project Owner Contributor

Maker Gummi Bear

rachelRachel

1.3k
5
17
The Blinking Coin Cell Christmas Tree runs entirely off the power of a coin cell with a bit of a gravity assist.
Project Owner Contributor

Gravity Assisted Blinking Coin Cell Christmas Tree

frank-milburnFrank Milburn

4.7k
26
36
Two analog voltage meters, ATtiny85s and some parts from a modern bike computer turned into speed and cadence gauges for a hipster's bicycle
Project Owner Contributor

Utterly Hipster Bicycle Speed & Cadence Gauges

insight-machines-labInsight Machines Lab

2.5k
27
34
Handmade retro taking calculator with QDSP6064 bubble display
Project Owner Contributor

Retro taking calculator with Bubble display

bobriciusbobricius

17.1k
7.8k
69
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

43.2k
195
137
Mesh of sensors, zigbee, custom RF, BT, wifi, all to MQTT Gateways on Raspberry Pi with database, dashboard and webapps.
Project Owner Contributor

Home Smart Mesh

wassimWassim

530
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

1.6k
993
18
7x5 LED Matrix display with 3 parts
Project Owner Contributor

Piggyback LED

morecatlabmorecat_lab

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

Blinky_40

robert-matejaRobert Mateja

126.5k
1.3k
674
A family of tiny robots, each with their own way of life.
Project Owner Contributor

Tiny robot family

shlonkinshlonkin

2.1k
16
13
Small battery for your ESP8266 devices.
Project Owner Contributor

Coin Battery Shield for D1 Mini

dehipudeʃhipu

201
5
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

6.7k
22
31
A clone of National Semiconductor's LM3909 IC using discrete components on a PCB.
Project Owner Contributor

Disintegrated LM3909 - 1.5V LED Flasher

dillon-nicholsDillon Nichols

10.4k
60
56
If you have a lot of time, you can decide your position on Earth just using watches and eyes. Or RTC and LDR.
Project Owner Contributor

Light level geolocator

jaromirsukubajaromir.sukuba

926
10
7
CR2032 Coin Cell LCD Projector. Digispark Attiny85 module, LCD panel harvested from ebay mp3 player.
Project Owner Contributor

Coin Cell LCD Projector

challengingstage888ChallengingStage888

9.4k
99
84
A little UHF transmitter can be located with a directional antenna.
Project Owner Contributor

Tiny Low-Tech tracking transmitter

tomTom

514
7
6
Small electronic cricket using the common CMOS 74HC14N
Project Owner Contributor

Electronic Cricket

alexisAlexis

1.1k
4
6
How many screws can you drive with a CR2477?
Project Owner Contributor

Coin Cell Power Screwdriver

ted-yapoTed Yapo

2.3k
21
25
Atmel Attiny 85 + 6/4 RGB LEDs + analog sensor + battery 3v
Project Owner Contributor

Reactive Jeweleries

maxim-krentovskiyMaxim Krentovskiy

780
7
12
PlexChar it's a mini led matrix board with tiny controller
Project Owner Contributor

PlexChar

alexander-ryzhkovAlexander Ryzhkov

2.2k
9
3
Call me Slow-on-the-Draw if you like, but I think there's a lot to be learned from this project even if it's a me-too.
Project Owner Contributor

Yet Another Fidget POV (YAFPOV)

doctekdoctek

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