A 10 bit scanning voltmeter with a Minimum Mass Wireless Coupler, based on the ATMega8.Range to the Minimum Mass Base Unit is 10 to 15 cm. If the voltmeter is battery operated, it can be floated from ground. The basic Minimum Mass Wireless Coupler technology is described and links to other projects on this site
Minimum Mass Wireless Coupled Scanning Voltmeter using ATmega8 microcontroller is a post from: ATMega32 AVR