This optical theremin was found in a 90s Hands-On Electronics. The basic frequency is given by C1 and the output is made in a speaker through a small output transformer.
Found in an old Raytheon transistor manual, this 4-scale voltmeter has an accuracy that depends on the...
This circuit was obtained from a 2005 Linear Technology application manual. The circuit is...
August 2017 - The PIC32MM microcontrollers of the Microchip 32-Bit Family can be obtained from...