The circuit is from an Electronics Hobbyst Handbook from the 90s, being valid for panels of the time, with lower performance. The circuit supplies 2.4V with 125mA current.
This VHF receiver with three transistors and loudspeaker listening was found in European...
This sensor was published in Radio Electronics magazine in April 1962. The two-transistor circuit...
This circuit consists of a monostable multivibrator using the LM3900 transconductance operational...