Spike Guard. Simple Design 25


This Tiny circuit can protect your LCD TV from Voltage surge at power on. It takes 2 minutes delay before connecting power to the TV. Within that time, mains power will become stable. Heavy inrush current at power on or when power resumes after a power failure can damage the TV permanently. If few minutes delay is provided, the AC will become stable. This is the delay technique used in Stabilizers.
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Telephone Guard. Simple Design 24

This simple add on circuit prevents misuse of Land Phone and also indicates whether the Phone lines are Ok or not .It is an ideal tool to test the Telephone lines. It lights LEDs to confirm the signals coming in the Telephone lines. It can also be used as a simple Telephone lock to block outgoing calls.
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