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.
This simple metronome, from 1985 documentation uses only transistors and has two settings. For...
This circuit is from a1970 documentation. R1 may have 10k and P1 47k. The transistors can be BC558...
This circuit consists of a variation of the previous one being activated when the switch is...