This interesting circuit for SMD assembly appeared in the November 1987 issue of Radio Electronics magazine. The phonons are generated by selected resistors that are fitted to the assembly.
In this circuit found in a Texas Instruments 2016 documentation we have an adjustment for the...
This circuit is ideal for creating a source that allows the use of automotive power devices on a...
This circuit is from an English publication of 1982. The bipolar transistor can be a BC548 and the...