This very high voltage generator for photographing the aura was found in the special edition of Radio Electronics Eerimenter magazine from 1990. The circuit uses a car ignition coil.
Suggested by Motorola documentation from the 1980s, this circuit makes use of MOSFETs of the time....
In the figure we have a small general-purpose amplifier with the LM386 integrated circuit and...
This circuit allows you to use a digital multimeter as a thermometer. The sensor is mounted in a...