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.

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Cascading the 4510 (CB181E)
Figure bellow shows how the 4510 can be cascaded for counts higher than 10. The circuit shows the...
Graphic Equalizer 741 (CB25841
E) In this circuit we have the details of a section with the others repeating with the values...
Sharp Cut Filter (CB6732E)
Found in American documentation from 1968, this circuit has an acute cut-off of the frequency to...