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 receiver can be used to receive signals from the previous circuit transmitter. The circuit is...
This simple voltage regulator or stabilizer uses only two component and can source up to 100 mA to a...
This 80's circuit uses a light-sensitive SCR or LASCR and a one-sided silicon switch SUS, uncommon...