This circuit of old medical documentation generates pulses in a ratio of 20 to 300 and duration of 3 ms. The circuit has biomedical applications and can use modern equivalent components.
The A3906 integrated circuit from Allegro Microsystems (www.allegromicro.com) consists of a PWM...
This analog TV circuit can be used on a small transmitter. The circuit is from an 80's American...
This circuit is from an Electronics Now from the 90s. It applies to almost any operational...