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31 Projects tagged with "coin cell"

 
2.8k
20
20
A minimalist 1.5V coin cell led tree with all components and power source confined within a mini breadboard.
Project Owner Contributor

Joule Thief Mini Christmas Tree

chris-chungChris Chung

1.3k
1.3k
8
Uses Bluetooth 4.0 and a coin cell battery to detect when you leave your sunglasses somewhere other than your car or home.
Project Owner Contributor

BLE Proximity Alarm for Sunglasses

daniel-youngDaniel Young

964
12
10
One breakout board to fit 6, 11, 16 and 20mm sized coin cells.
Project Owner Contributor

Coin Cell Maestro

analog-twoAnalog Two

7k
5.6k
87
Neopixel watch with accelerometer.
Project Owner Contributor

Arduino Neopixel Watch

marcello-gravesMarcello Graves

485
255
4
A BCD binary clock that fits inside of a jar
Project Owner Contributor

Binary desk USB jar clock

marius-taciucMarius Taciuc

6.9k
61
52
A low cost ultra-low-power small-sized high accuracy temperature logger for use in scientific research.
Project Owner Contributor

Low-cost/power/size temperature logger

nikosNikos

400
1
1
A clock with spiritual messages
Project Owner Contributor

Cronos

marius-taciucMarius Taciuc

935
935
1
Using the built-in reed switch on the mcMod120, we'll show you how to setup a super easy way to be alerted and track opening doors!
Project Owner Contributor

Wireless IoT Door Open/Closed Sensor

mcthingsmcThings

195
1
0
While some choose to make smartwatches filled to the brim with bells and whistles, I want to do the job with as little as possible.
Project Owner Contributor

The Lazy Watch

skye-rutan-bedardSkye Rutan-bedard

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

1.5k
1.5k
6
Coin-cell operated, wireless IoT soil moisture sensor using mcThings! Alerts, status levels, temperature!
Project Owner Contributor

Wireless IoT Soil Moisture Sensor Using mcThings!

mcthingsmcThings

286
1
0
An RFID Wallet is a minimalist's dream. A slim 3D printed wallet with an embedded configurable RFID tag
Project Owner Contributor

RFID Wallet

brandon-pinerBrandon Piner

13.2k
25
15
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

9.9k
33
37
A pranking device to annoy your friends... or perhaps an entire college campus.
Project Owner Contributor

ATTiny Low Power Prank

joseph-primmerJoseph Primmer

528
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

1.3k
5
17
The Blinking Coin Cell Christmas Tree runs entirely off the power of a coin cell with a bit of a gravity assist.
Project Owner Contributor

Gravity Assisted Blinking Coin Cell Christmas Tree

frank-milburnFrank Milburn

845
3
6
The business card of a common singing bird.
Project Owner Contributor

Chiffchaff Card

adam-antokAdam Antok

49.7k
184
110
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

1.2k
433
4
My entry to the Hackaday coin cell challenge: A circuit that turns LEDs into miniature supernovas that light up and explode.
Project Owner Contributor

LED Supernova

cls-02cls-02

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

coin2pi

mincepimincepi

8.2k
53
51
A small, cheap ($2 BOM), open source charger for LIR2032 and 20mm rechargeable coin cells built from an MCP73831.
Project Owner Contributor

LIR2032 Coin Cell Charger

jon-thomassonJon Thomasson

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