Found in an Electronic Design from the 90s, this circuit generates a mathematical function given by the formulas next to the diagram. The basic component is from the period.
This simple two-transistor capacitance meter uses a 50 uA microammeter as an indicator instrument. The...
In this alarm R1 and R2 can be 10k. The SCR is any 106 Series SCR and V1 is an oscillator buzzer....
This circuit, which was common at the time, was found in the February 1973 issue of Radio...