This circuit was found in a Signetics documentation from the 1980s. The integrated is a PLL and the SCR is a general purpose type The pitch frequency is given by R1 and C1 as formula next to the diagram.
To use the instrument for AC measurement, the tips are A and B. For CC use tips A or B for...
This power supply was originally designed to power our next circuit (CB18672E) which consists of a...
This circuit was obtained in a 1990 English magazine. The circuit can be assembled with equivalent power...