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.
This ultra-low consumption circuit was found in old European documentation. The frequency depends on...
This circuit was found in a National Semiconductor manual from the 1980s. The circuit uses a FET...
This circuit can provide both positive and negative voltage outputs from 2 to 12 V with current up to...