Found in old documentation, this source uses an integrated circuit from that time, which is uncommon nowadays. The power source has a ripple below 1 mV.
This circuit generates a simple guess when you press CH1 and then release. The circuit can be...
This circuit receives, through a coil, audio signals emitted by another coil connected to the...
This circuit is based on the well-known PLL 567 and can operate at 100 kHz. The transformer can be...