Despite being from a 1969 publication, the transistors used have current equivalents such as BC548 and BC558. The circuit generates signals from 1 500 to 20 000 Hz and 4 scales.
This circuit consists of a Step-Down converter (voltage reducer) that can provide a 5 A output with...
This circuit produces a IR beam with a frequency adjusted by the 100k pot. The circuit can be used in...
This simple current control setup was found in documentation from the 60's. The low current...