This narrowband data receiver is from the Philips Databook of 1990. The circuit is powered by 5 V and N1 has 3.21 turns, N2 1 turns with Q = 16.
Found in a PE Hobbyst Handbook from 1991, this circuit uses a common photocell as a sensor. The...
This circuit is from a publication from the 50's. Inductive components are critical, and...
This simple multivibrator circuit generates a 1 kHz signal rich in harmonics. The circuit is from...