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Coin Cell Challenge Entries

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97 projects
126.6k
1.3k
674
A family of tiny robots, each with their own way of life.
Project Owner Contributor

Tiny robot family

shlonkinshlonkin

51.7k
190
113
This project using an ESP8266 to find the password of a WiFi access-point with PBC enabled.
Project Owner Contributor

WiFi cracker ESP8266(PBC)

sagar-naikSagar Naik

6.6k
82
66
Low Power Temperature/Humidity Monitoring
Project Owner Contributor

Gecko Node - Wireless Low Power Sensor

maxkMax.K

69.4k
427
416
Low power Arduino based (smart)watch
Project Owner Contributor

Chronio

maxkMax.K

13.5k
130
121
badgy is a rechargeable coin cell powered ePaper display with WiFi connectivity
Project Owner Contributor

badgy

w4ilunw4ilun

9.8k
119
116
A Wordwatch using a 11x10 charlieplex matrix.
Project Owner Contributor

Word Wristwatch

cfCF

661
8
7
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

1.6k
24
28
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

7k
3.8k
57
A charlieplexed 20 LED blinker with ATTiny45. Space efficient daisychained LED placing with shared anode/cathode soldering pads.
Project Owner Contributor

LED ring

jens-haukeJens Hauke

1.1k
2
3
A Pi Zero and tiny display powered by a coin cell.
Project Owner Contributor

coin2pi

mincepimincepi

8k
97
114
An Arduino-based watch using 97 LEDs to show the time.
Project Owner Contributor

LiquidWatch

cfCF

2.2k
10
4
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

5
5
WatchMeter is a low power wrist multimeter. Very portable and intended for quick measurements and unexpected situations.
Project Owner Contributor

WatchMeter

carlos-reverbelCarlos Reverbel

927
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

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

Electronic Cricket

alexisAlexis

3.7k
26
37
Display falling tetris blocks on a oled screen made into an ear ring. It's powerded by a coin cell.
Project Owner Contributor

oled earrings

danielDaniel

1.2k
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: A component tester

patel-darshilPatel Darshil

857
4
7
The business card of a common singing bird.
Project Owner Contributor

Chiffchaff Card

adam-antokAdam Antok

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

Blinky_40

robert-matejaRobert Mateja

636
4
2
A small circuit inside an enclosure, both optimized to resist a hit to the ground
Project Owner Contributor

Airsoft sonic grenade

eduardEduard

250
4
4
I'll be sharing with you my experience of how i started from a simple idea to a finished product
Project Owner Contributor

VibClock

foxmjayFoxmjay

503
256
5
A BCD binary clock that fits inside of a jar
Project Owner Contributor

Binary desk USB jar clock

marius-taciucMarius Taciuc

420
1
1
A clock with spiritual messages
Project Owner Contributor

Cronos

marius-taciucMarius Taciuc

7.9k
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

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