Circuit, Components, Design, Electronics, Home, Techniques, Television

Long range uPD6121 IR Transmitter


Here is a long range Digital IR transmitter. It is a precision IR transmitter suitable for TSOP 1738 IR receiver module. Unlike other IR transmitters, this circuit is highly reliable and gives fail proof operation.

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Circuit, Components, Design, Electronics, Hobby Circuits, Personal, Techniques

Personal Alarm


If you feel threatened or need an urgent support in a crowd, use this alarm to catch the attention of others. It generates a loud siren simulating that of the Fire brigade which is enough to get support from others. A single press on the switch can activate the siren for 2 minutes and then it automatically stops. It is too small enough to keep in the pocket or hand bag.

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