This is a typical circuit of a PROM programmer from the 70s. It appeared in the magazine Radio Electronics in 1979. Note that the programming was done manually byte by byte using switches.
This 2-CK722 oscillator was found in a march 1961 Radio Electronics Magazine. The circuits need...
The two circuits we suggest are from the book Optoeletronics - Theory and Practice by Texas...
This interesting configuration of optical triggering using an oscillator was found in a 90s...