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Coin Cell Challenge Entries

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97 projects
1.9k
14
13
Tracker using ATmega with added EEPROM Storage capabilities
Project Owner Contributor

TRACKER

madivakmadivak

1k
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

10k
100
85
A little UHF transmitter can be located with a directional antenna.
Project Owner Contributor

Tiny Low-Tech tracking transmitter

tomTom

6.6k
75
76
whowhow. whowhow. - formally known as purple rider
Project Owner Contributor

K.I.T.T. - KNIGHT RIDER badge/brooch

davedarkodavedarko

1.1k
4
7
The business card of a common singing bird.
Project Owner Contributor

Chiffchaff Card

adam-antokAdam Antok

6.2k
40
36
Arcade games on the Micro:bit
Project Owner Contributor

Micro:Boy

dehipudeʃhipu

1.8k
995
19
7x5 LED Matrix display with 3 parts
Project Owner Contributor

Piggyback LED

morecatlabmorecat_lab

17.9k
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

8.3k
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

9.2k
48
42
Wait overnight and do your welding job!
Project Owner Contributor

Coin cell battery powered spot welder

jaromirsukubajaromir.sukuba

313
4
2
Silicon Laboratories inc. sell MCU named Busy Bee, I decided to give it a try by transforming one in desperate firefly.
Project Owner Contributor

desperate firefly

jacquesJacques

2.2k
22
31
Small sized 555 timer based piano.
Project Owner Contributor

555 piano

alexander-ryzhkovAlexander Ryzhkov

2.3k
24
29
I guess I can't stop doing badges. Really love the @pimoroni #bearables - but they don't have sloths :(
Project Owner Contributor

sloth badge

davedarkodavedarko

72.2k
428
416
Low power Arduino based (smart)watch
Project Owner Contributor

Chronio

maxkMax.K

5.2k
27
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

13.8k
130
121
badgy is a rechargeable coin cell powered ePaper display with WiFi connectivity
Project Owner Contributor

badgy

w4ilunw4ilun

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

466
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

679
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

902
791
24
.........Security hacker....... Ethical hacking how to secure my computer
Project Owner Contributor

Computer Hacking

ahmednaseruddinmoizahmednaseruddinmoiz

512
6
6
A gift tag for the holiday season including a 7x10 LED matrix, which can show a personal text message.
Project Owner Contributor

Happy Holidays gift tag

cfCF

1.4k
6
10
A small quiz game that reads questions from web and shows them on a small oled dispay, using a 3.6V battery, an ESP8266-01 and two buttons
Project Owner Contributor

ESP8266 Oled Mini Quiz

giulio-ponsGiulio Pons

70.7k
337
294
Multi-year always-on LED replacements for gaseous tritium light sources
Project Owner Contributor

TritiLED

ted-yapoTed Yapo

2.9k
27
34
Handmade retro taking calculator with QDSP6064 bubble display
Project Owner Contributor

Retro taking calculator with Bubble display

bobriciusbobricius

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