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.
This simple circuit allows testing of general-purpose diodes and rectifiers and also general...
This circuit not only indicates when the battery is on but also when it is low. The circuit is...
This circuit shows how to add a 1st regulator to a source that already has a step for this...