We found this circuit in the 1957 Raytheon transistor application manual. The transistor can be a BC558 and the common 6 V relay, just by using this voltage in the supply.
This antenna tuner was found in a 1995 publication in the 1993 Electronics Hobbyists Handbook. The coil...
This circuit is from the 1982 SGS Linear Circuits Manual. The circuit provides currents from 35 mA...
ROHM Semiconductor is featured in a new line of IR LEDs, Proximity Optical Sensors and Ambient...