This small transmitter appeared in the March 1989 issue of Radio Electronics magazine. The two-transistor circuit used an electret microphone and had a range of a few dozen meters.
Author: Newton C. Braga Published:July 5, 2016 Formato:Book and e-Book Pages:...
This circuit can be used in alarms by activating a relay or a current load that depends on the...
This circuit for the 1.5 to 15 V scaled ranges was found in a 1982 documentation, but uses current...