This is a simple 2 WAY radio chat device built from Digispark (ATTINY85) + FS1000A + MX-PM-5V modules. Allows "IRC" like radio communication between several PC connected to 433MHz/315MHz frequency.

This is simple LED BANNER constructed of Arduino Digispark and daisy-chained set of MAX7219 LED 8x8 matrix. Displays up to 500 characters long text message that is stored in non-volatile EEPROM memory of the chip and uploaded via USB from the PC ( Putty terminal ) - natively from USB or via FTDI232 USB-to-Serial converter