Pulse-triggered 7555 monostable (CB25128E)

We found this circuit in a Radio Electronics magazine from April 1988; The output timing is given by R1 and C1.

Logic Probe with Memory (CB5909E)
This 7400 TTL circuit has a memory, keeping the LED on when a pulse is detected. The circuit must be...
Temperature Dependent Oscillator (CB931E)
The frequency produced by this oscillator depends on the temperatire sensed by a thermistor. The...
Bicycle Horn (CB6488E)
We find this power oscillator circuit in a 90's Popular Electronics. The circuit can be powered by...