Blown Fuse Alarm (CB6109E)

We found this circuit in a 1967 Electronic design. However, it can be easily implemented even today as it uses only common diodes.

| Clique na imagem para ampliar |

DC Motor Control (CB5376E)
This PWM control circuit was found in an old documentation, but appears elsewhere on this site...
Sensitive Comparator CA3080 (CB25137E)
Found in the May 1988 issue of Radio Electronics magazine, this circuit is sensitive to small...
Morse Automatic Generator (CB4134E)
This circuit is intended to manipulate a transmitter (CW) from coded audio signals recorded on a...