Simplest Continuity Tester

0 comments Thursday, July 28, 2011

This is probably the simplest continuity tester in the world. Used for emergency circuit test when no AVO meter is available. R 100 ohm can be replaced (or even omitted) with any resistance size depend on your convenience.

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Baby Urinate Detector

0 comments Tuesday, July 19, 2011

This device will sound when the sensor plate is poured by water or high moisture condition.
Applicable for baby urinate detector. The sensor plate can be replaced with a piece of sheet sewed by conductive wire. Sewing lane should not follow the  pattern/format as shown in the picture. Just make sure that the wires are not connected each other.
No power consumes when no water on the sensor.

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Voltage Doubler


This simple 555 application will double the input voltage. It's created by "charge-pump" circuit with a 555, diodes, and capacitors.
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One lamp operated by four and more switches

0 comments Thursday, June 9, 2011

This circuit is for controling one lamp through one and many different places.
You need to provide two SPDT switches (for two locations) and additional DPDT switches for additional location for controling the lamp. 
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Satellite Yamal 202 ~ Batam's Blog

0 comments Monday, May 16, 2011
Satellite Yamal 202 ~ Batam's Blog

Click here to view this post in English

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