Extracting Fuses (IP050E)

The figure bellow show the correct procedure to extract a fuse. Use a small piece of tissue to pull the fuse without risk.

Programmable input amplifier (CB7443E)
This circuit was found in American documentation from the 90's. The circuit applies to any...
Transistor Gain Test (CB12265E)
We found this circuit in an English publication from 1980, but it can be assembled with BC548...
Light Activated Alarm (CB26164E)
This circuit was found in the 1991 Electronics Experimenter's Handbook. It activates a relay when...