Institute Newton C. Braga

Circuit Bench

M204 Audio Preamplifier (CB849E)
This is a general purpose pramplifier launched in Brazil by Philips in the years 70. The BC549 is...
Long period integrator (CB6843E)
Suggested by National Semiconductor in documentation from the 90s, this circuit makes use of an...
Self-disconnecting battery charger (CB4975E)
This 12V battery charging circuit automatically shuts off at the end of the charge. The disconnect...