Reminder (CB9548E)

This circuit maintains on a flashing LED at a frequency determined by the capacitor. The unijunction transistor can be 2N2646.

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12 V Flasher 4001 (CB15441E)
In the figure we show another interesting application for integrated circuit 4001. This circuit...
Long-Range Wiretapping (CB19321E)
We found this wiretapping circuit in a publication from the 90s. The circuit allows the cable...
Current Sensor Shield (CB5231E)
This circuit includes an AD converter for interfacing with a microprocessor and can be used as a...