Found in a Popular Electronics from the 90s, this circuit can act as a transmitter for an audio link. The output transistor admits a higher power equivalent, depending on the LED.
The circuit shown is from National Semiconductor's Linear Applications Handbook. The LM3900 is a...
I found this circuit in a 1992 Electronics Experimenter Handbook. The circuit can be easily...
ABB drives the energy revolution with newly emerging use of solar power in Singapore Land scarcity has...