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Coin Cell Challenge Entries

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99 projects
591
6
9
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

527
4
5
How many screws can you drive with a CR2477?
Project Owner Contributor

Coin Cell Power Screwdriver

Ted YapoTed Yapo

6.3k
74
69
A Wordwatch using a 11x10 charlieplex matrix.
Project Owner Contributor

Word Wristwatch

CFCF

309
141
5
.........Security hacker....... Ethical hacking how to secure my computer
Project Owner Contributor

Computer Hacking

ahmednaseruddinmoizahmednaseruddinmoiz

17.9k
187
143
Multi-year always-on LED replacements for gaseous tritium light sources
Project Owner Contributor

TritiLED

Ted YapoTed Yapo

720
0
1
A Pi Zero and tiny display powered by a coin cell.
Project Owner Contributor

coin2pi

mincepimincepi

1.3k
4
6
This is a 3d printed mini led lamp ran on a 3v coin battery.
Project Owner Contributor

3v coin powered Articulated Mini Lamp

OddDavisOddDavis

455
2
3
ESP8266 + Coin Cell + Match Box = Dash Button
Project Owner Contributor

Match Box ESP Dash Button

Hagen FritschHagen Fritsch

2.9k
11
24
An Arduino powered birthday reminder device that'll wish you happy birthday for 50 years on a single CR2450 coin cell.
Project Owner Contributor

Birthday Alarm That'll Run for 50 Years!

Vishnu M AieaVishnu M Aiea

101.1k
1.2k
576
A family of tiny robots, each with their own way of life.
Project Owner Contributor

Tiny robot family

shlonkinshlonkin

219
95
1
A BCD binary clock that fits inside of a jar
Project Owner Contributor

Binary desk USB jar clock

Marius TaciucMarius Taciuc

1.4k
17
22
Small sized 555 timer based piano.
Project Owner Contributor

555 piano

Alexander RyzhkovAlexander Ryzhkov

619
6
6
Lorentz dreams about metal horses
Project Owner Contributor

pic-o-matic

Robert MatejaRobert Mateja

289
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

5.4k
74
86
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

288
1
1
1 Bite 4 results using sin in a coin
Project Owner Contributor

Volumetric parametre

Galasso David LeonardoGalasso David Leonardo

3.9k
32
38
Just a simple compact tetris clone using an ATTINY85 and a cheap OLED display.
Project Owner Contributor

pockeTETRIS

dombeefdombeef

116
3
0
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

212
1
1
A small circuit inside an enclosure, both optimized to resist a hit to the ground
Project Owner Contributor

Airsoft sonic grenade

EduardEduard

362
3
6
Coin cell powered 555 timer with ultraviolet LED coated with glow in the dark paint to mimic a firefly.
Project Owner Contributor

Fireflies

Jux CrowJux Crow

2.4k
10
5
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

247
1
0
A clock with spiritual messages
Project Owner Contributor

Cronos

Marius TaciucMarius Taciuc

4.7k
32
28
Wait overnight and do your welding job!
Project Owner Contributor

Coin cell battery powered spot welder

jaromir.sukubajaromir.sukuba

824
20
24
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

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