Institute Newton C. Braga

Circuit Bench

Liquid Level Alarm (CB5310E)
This circuit was found in a 1980s documentation. It triggers a relay when liquid from a reservoir...
High Pass Filter (CB20930E)
Found in Radio Electronics, this filter is suitable for attenuating up to 40 dB for AM radio...
Sound Effects Generator (CB25050E)
Found in the June 1987 issue of Radio Electronics magazine, this circuit uses well-known CMOS...