Found in an Electronic Design from the 90's, this circuit simulates a 100 W resistor. The power transistor must match the desired current in the load under test.
We obtained this oscillator in a publication for radio amateurs in 1978. The circuit operates on...
Binary Indicator (CB6700E) This circuit was obtained from old documentation but can be used as a...
The LM339 is a voltage comparator, but it can be used as a low frequency amplifier, as shown in...