This circuit was found in a Popular Electronics documentation from the 90s. It is possible to switch the frequency of an oscillator by voltage. The circuit can act as a shield.
This circuit generates approximately 30 Hz signals from a 3.3 kHz clock. The circuit was found at...
This humidity alarm, rain or leakage was found in a 1992 publication. The sensor consists of a printed...
This circuit converts a range of input voltages to a corresponding logarithmic range. The...