the invention is a digital radiation detector utilizing the stable timing functions of a microcontroller or plurality of microcontrolling devices to perform three independent functions . a first timer generates a continuous square wave output that is fed through a class b amplifier to yield a stable , drift - free power supply for a connected radiation sensor . a second timer is used as an event counter for counting the processed pulses coming from the radiation sensor . a third timer acts as a real time clock generating a one - second interrupt for quantifying the number of counts per second . the number of counts per second can be communicated as raw data through a communication interface or presented as a number of audible or visual displays .