This circuit was found in a 1964 Electronic Design. The circuit makes use of transistors of the time. Current equivalent transistors may be experienced.
This two-phase stepper motor circuit was found in an old documentation using an operational amplifier...
The frequency of this oscillator depends on the amount of light incident on the LDR. The circuit,...
We found this circuit in a 1980s American publication from Motorola. Modern equivalent transistors...