Geiger Counter Kit - Radiation Sensor _MAKE_DISPLAY_SEG LED matrices like these are

LED matrices like these are 'multiplexed' - so to control all the seven-segment LEDs you need 14 pins

We suggest using this board in conjunction with a USBtinyISP programmer (not included)

Stack multiple Pixy2 sensors on a single microcontroller

These modules are typically used in safes - there's a high powered DSP chip that does the image rendering

Geiger Counter Kit - Radiation Sensor _MAKE_DISPLAY_SEG LED matrices like these areDetect particles and or make a cool random number generator with this handsome Geiger counter kit. This easy to make pack of parts turns a simple Geiger Muller tube (included) into a portable blink, beeping radiation detector. You can also connect an FTDI friend to the header, to get serial output for datalogging on your computer. We put this kit together in a couple of hours and hand lots of fun bringing it around and listening for ticking sounds