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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Resources by 3lectrix

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Water Level Alarm 2011-12-29
This circuit will produce an audible alarm when the water level reaches a preset level.The circuit
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Power Supply Failure Alarm 2011-12-29
Most of the power supply failure indicator circuits need a separate power supply for themselves. Bu
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Infrared Proximity Detector 2011-09-10
This proximity detector using an infrared detector (Fig. 1) can be used in various equipment like a
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Light Activated Switch 2011-09-04
The circuit is based on National Semiconductors comparator LM311 (IC1) and an LDR. The non invertin
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How To: Test A Uni Junction Transistor 2011-07-03
You can easily test the health of a UJT (Uni junction transistor) by using a digital multimeter. Do
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Digital Stop Watch 2011-06-18
A digital stop watch built around timer IC LM555 and 4-digit counter IC MM74C926 with multiplexed 7
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Digital Code Lock 2011-06-16
This is a simple but effective code lock circuit that has an automatic reset facility. The circuit
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Police Siren (NE555) 2011-06-16
Here is the circuit diagram of a police siren based on NE55 timer IC. The circuit uses two NE555 ti
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Dark Detector 2011-06-16
The dark detector circuit shown here can be used to produce an audible alarm when the light inside
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