We found this circuit in an American publication from the 90s. It generates pulses that can be modulated in amplitude. The supply can be done by voltages from 5 to 12 V and the frequency depends on C1 and C2.
This circuit can flash for up to 30 months using alkaline batteries as shown in the table next to the...
This circuit accurately monitors a 5 V TTL source. The circuit is from National Semiconductor's Linear...
The purpose of this circuit is to match two operational amplifiers that operate with different...