This circuit for cars of the time was found in a Popular Electronics magazine from the 90s. The circuit is based on CMOS logic that is common even today.
The capacitor connected to the diode delays the start of operation of the oscillator, whose...
This circuit can be used as a receiver for the CIR10534 transmitter or others described in this...
By pressing and releasing PB1, only one LED is lit, drawing a number from 1 to 6, as in a die. The...