This circuit was found in a Electronics World of 1968. The integrated circuit is the MC1320P from Motorola, uncommon today.
Presence Detector (CB18741E) The original name of this project found in documentation from the 90s...
The circuit shown is the receiver for the CIR5645S, also suggested by National Semiconductor. The...
E) We found this circuit in a PE Hobbyst Handbook from the 90s. The components are common, except...