Modification of the counter to have HV programmable by IR TV remote

This is a modification of  the DIY Geiger counter to have HV programmable with IR TV remote control. This version assumes two voltages 400V and 500V - for most popular russian and western made Geiger-Müller tubes.

This modification in essence is substitution of the generator on 555CMOS timer chip with a signal generated by the ATMEGA328 timer.