This circuit was found in a 70s documentation. The transistor is from that time. L1 has 4 turns of wire 20 in the form of 3/32 inches and L1 has 10 turns of the same wire,
This circuit can be used in alarms, data links or áudio links using IR radiation. The circuit is...
This amplifier can amplify signals from 10 Hz to 17 MHz with more than 30 dB of gain. The circuit is...
This circuit, found in a publication from the 1970s, produces a 1 Hz sinusoidal signal....