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Coin Cell Challenge Entries

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99 projects
15.3k
99
76
Starting a car with a CR2477 coin cell
Project Owner Contributor

Coin Cell Jump Starter

Ted YapoTed Yapo

259
1
0
A clock with spiritual messages
Project Owner Contributor

Cronos

Marius TaciucMarius Taciuc

1.1k
10
9
TESTERA is the exclusive handy tool that allows you to test components like LED, Capacitor, Transistors, IR LED, LDR, etc.
Project Owner Contributor

TESTERA: New ERA of testing

Patel DarshilPatel Darshil

788
1
2
A Pi Zero and tiny display powered by a coin cell.
Project Owner Contributor

coin2pi

mincepimincepi

259
2
1
A small circuit inside an enclosure, both optimized to resist a hit to the ground
Project Owner Contributor

Airsoft sonic grenade

EduardEduard

579
13
13
Reversing Engineering
Project Owner Contributor

Coin Cell Challenge (1) Shower Battery Charger

Vije MillerVije Miller

12.5k
619
81
wearable UV Index & weather sensor
Project Owner Contributor

UV-badge

x-labzx-labz

430
6
6
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

7.2k
59
55
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

jaromir.sukubajaromir.sukuba

1.5k
8
21
An annoying, tiny, rickrolling friend
Project Owner Contributor

ATtiny10 rickroller

shlonkinshlonkin

502
3
3
WatchMeter is a low power wrist multimeter. Very portable and intended for quick measurements and unexpected situations.
Project Owner Contributor

WatchMeter

Carlos ReverbelCarlos Reverbel

3.3k
26
34
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

651
7
6
Lorentz dreams about metal horses
Project Owner Contributor

pic-o-matic

Robert MatejaRobert Mateja

984
22
26
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

1k
11
12
A drink coaster which changes color based on a cups temperature
Project Owner Contributor

Thermal Coaster

Ray OlsenRay Olsen

264
2
2
A wireless node to detect door opening.
Project Owner Contributor

WIRELESS_DOOR_SENSOR

texanetexane

199
1
2
Small electronic cricket using the common CMOS 74HC14N
Project Owner Contributor

Electronic Cricket

AlexisAlexis

589
4
5
How many screws can you drive with a CR2477?
Project Owner Contributor

Coin Cell Power Screwdriver

Ted YapoTed Yapo

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

Noodle Spawnling

Sarah PetkusSarah Petkus

136
2
3
Busy Bee playing music
Project Owner Contributor

BBsynth

JacquesJacques

4.2k
12
7
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

2.5k
15
18
A clone of National Semiconductor's LM3909 IC using discrete components on a PCB.
Project Owner Contributor

Disintegrated LM3909 - 1.5V LED Flasher

DillonDillon

13.5k
155
142
A handheld game console programmable with (Micro/Circuit)Python.
Project Owner Contributor

µGame

ꝺeshipuꝺeshipu

2.7k
16
15
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

MEGA DASMEGA DAS

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