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Coin Cell Challenge Entries

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98 projects
2.1k
18
23
Atmel Attiny 85 + 6/4 RGB LEDs + analog sensor + battery 3v
Project Owner Contributor

Reactive Jeweleries

Maxim KrentovskiyMaxim Krentovskiy

620
6
10
Touch controlled light-up PCB business card, no microcontroller required!
Project Owner Contributor

Analog Touch Control Business Card

SunnySunny

1.1k
23
27
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

1.8k
9
23
An annoying, tiny, rickrolling friend
Project Owner Contributor

ATtiny10 rickroller

shlonkinshlonkin

323
5
4
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

422
3
4
Coin Battery Powered Open Fridge Alarm.
Project Owner Contributor

Open Fridge Alarm

mariusz_nowak_engmariusz_nowak_eng

227
1
2
Small electronic cricket using the common CMOS 74HC14N
Project Owner Contributor

Electronic Cricket

AlexisAlexis

7.5k
87
85
A Wordwatch using a 11x10 charlieplex matrix.
Project Owner Contributor

Word Wristwatch

CFCF

1.8k
20
22
A posable micro-spawn of NoodleFeet that beeps and judges you <3
Project Owner Contributor

Noodle Spawnling

Sarah PetkusSarah Petkus

476
3
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

6.8k
14
10
This project describes the use of a coin cell for powering the Esp8266 by building a remote control for Phillips Hue Lights
Project Owner Contributor

Solved: Esp8266 powered by coin cell

GelstronicGelstronic

18.8k
77
101
If you like happy, easy to build projects, this is not for you. This project is only for people who like to be miserable and frustrated.
Project Owner Contributor

An Unfortunate SMD Project

MakersBoxMakersBox

51.8k
336
326
Low power Arduino based (smart)watch
Project Owner Contributor

Chronio

Max.KMax.K

6.9k
29
35
A pranking device to annoy your friends... or perhaps an entire college campus.
Project Owner Contributor

ATTiny Low Power Prank

Joseph PrimmerJoseph Primmer

4.2k
70
70
whowhow. whowhow. - formally known as purple rider
Project Owner Contributor

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

davedarkodavedarko

7.2k
78
93
An Arduino-based watch using 97 LEDs to show the time.
Project Owner Contributor

LiquidWatch

CFCF

3.6k
33
31
Arcade games on the Micro:bit
Project Owner Contributor

Micro:Boy

de∫hipude∫hipu

1.1k
12
12
A drink coaster which changes color based on a cups temperature
Project Owner Contributor

Thermal Coaster

Ray OlsenRay Olsen

138
4
1
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

701
7
6
CR2032 Coin Cell LCD Projector. Digispark Attiny85 module, LCD panel harvested from ebay mp3 player.
Project Owner Contributor

Coin Cell LCD Projector

ChallengingStage888ChallengingStage888

6.3k
35
34
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

301
1
1
1 Bite 4 results using sin in a coin
Project Owner Contributor

Volumetric parametre

Galasso David LeonardoGalasso David Leonardo

274
6
11
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

1k
4
8
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

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