Found in Philips' 1967 documentation, this circuit makes use of period components. The SCR can be of any type, depending on the power of the controlled load.
Found in British documentation two years 70, this circuit generates two beats, being one of 800 Hz...
We found this circuit on Motorola's 1993 Linear Interface ICs. Equivalent operational amplifiers can be...
The battery is charged by the photocell that keeps the low consumption beacon in the dark. The...