We found this circuit in 1964 General Electric documentation. The circuit works with mechanical drive and can be adapted to operate as a didactic shield sensor.
This low-frequency circuit for alternating signals is from an early American 1980s documentation. The...
This 2003 circuit does not transport any passengers, it only synthesizes a sound almost identical to...
This treble and bass control drains some milliamperes from a 12 V supply and can be used with any...