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Resources by 3lectrix
Water Level Alarm
2011-12-29
This circuit will produce an audible alarm when the water level reaches a preset level.The circuit
Power Supply Failure Alarm
2011-12-29
Most of the power supply failure indicator circuits need a separate power supply for themselves. Bu
Infrared Proximity Detector
2011-09-10
This proximity detector using an infrared detector (Fig. 1) can be used in various equipment like a
Light Activated Switch
2011-09-04
The circuit is based on National Semiconductors comparator LM311 (IC1) and an LDR. The non invertin
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
Digital Stop Watch
2011-06-18
A digital stop watch built around timer IC LM555 and 4-digit counter IC MM74C926 with multiplexed 7
Digital Code Lock
2011-06-16
This is a simple but effective code lock circuit that has an automatic reset facility. The circuit
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
Dark Detector
2011-06-16
The dark detector circuit shown here can be used to produce an audible alarm when the light inside
