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Low-cost card-sized musical instrument with touch keys

Canta-Cart

A business card-sized calculator for developers

HexCalc

tyler-klein Tyler Klein

Who said only electronic signals can flow through circuits? I used water instead.

Microfluidic Business Card

saren-tasciyan Saren Tasciyan

MidiCard is a USB-C Midi Keyboard with 18 keys, sustain, modulation, octave buttons, and volume buttons, available at makerproducts.art.

MidiCard USB C Tiny Keyboard

alana-b Alana B

wifi/ble and nfc connected business card.

dynamic nfc business card

Type with only one hand without complications

PS-OHK

dylan-turner Dylan Turner

Use this to distract your customers. This one will stay on top of their desks instead of getting lost in a drawer.

Integrated Game Business Card

dan-schnur Dan Schnur

A tool for network scanning and ARP spoofing using the Atmega32u4 and W5500

ARPoLAN: Network Monitoring and Security Tool

I have made a simple but feature-rich business card. it has a tic-tac-toe game. let's see how I made this

PCB Bussiness Card With 4*4 Tic Tac Toe Game

Simple VU Meter in a business card form factor

VU Meter Business Card

Build a General MIDI YM3812 OPL2 Synthesizer the size of a business card using the SynthCard format. Great for Video Game music!

YM3812 Synth Card

tyler-klein Tyler Klein

Portable Li-Ion Battery Powered FM Radio Receiver

CH32V003 FM Radio Receiver

stefan-wagner Stefan Wagner

because paper is too easy

PCB Business Card

wardriving, a practice involving the search for Wi-Fi networks while on the move. Through a customized device, we capture existing Wi-Fi

Your Secret Weapon for Wireless Networks-Wardriver

Small USB 2FA authenticator for up to 32 profiles

Hardware 2FA TOTP authenticator