Who is the fast (CB9809E)

This simple TTL circuit indicates which was the first to press one of the four pressure switches. The circuit must be powered with a voltage of 5 V.

| Clique na imagem para ampliar |

Ultrasonic Doppler Receiver (CB8732E)
This is the receiver for the previous circuit, also found in 90s Radio Electronics. The circuit...
Automotive Tachometer with the 555 IC (CB1419E )
This circuit from a 1978 American publication is used on vintage vehicles that still have contact...
Darlington Push Pull Stage (CB6971E)
This circuit was suggested by Popular Elecronics from the 90's. The circuit has high input...