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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SCR Delay Circuit (CB14713E)
With the capacitor used, this circuit provides delays of 40 to 60 seconds. Larger capacitors can...
Stepper Motor Control (CB21247E)
Found in an Electronic Design from the 90's, this circuit generates signals for stepper motor...
Tunnel Diode Oscillaor (CB4602E)
The circuit shown in the figure can generate signals up to 1.6 GHz. Coil L1 and capacitor C2 are...