Lego automatic LED flashlight
Today my son wants to build the simple automatic flasher circuit. It is special that it will be light on dark. This circuit uses 5 parts only and cheap. He…
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January 13, 2016
Daylight sensor switch circuit,control artificial waterfall
This is daylight sensor switch circuit, for control load turn on when have sunlight. use simple circuit LDR,transistor,relay and can use with 12V supply [...]
June 9, 2015
Here is Automatic night light circuit using SCR and LDR without Relay!
Automatic night light circuit using SCR
This automatic night light circuit to controls power on-off in home. If daytime stop working circuit. But at night will working electrical AC 220 volts. [...]
February 7, 2013
2 Electronic mailbox circuit for front door
This circuit is integrated electronic mailbox,A front door open.And when people open. Cabinet photo detector attached to the light, it will work. The Simple circuit using SCR and transistors Operation…
October 6, 2010
Light Actuated Relay Circuit using Photo Transistor
The Sun - Up Relay Switch can be used to provide a audible switch for when the sun comes up. It can also be used to detect a light beam,…
August 23, 2008
Simple Light Activated Relay Circuit
If you are looking for circuit that turns on relay when light comes. It is a simple light activated relay circuit. It will control load on-off with light.
May 22, 2007
Opto-Thermo Control Relay Switch with IC 741
This is 741 Opto-Thermo Control Relay switch circuit. It is a simple electronic circuit using 741. I love a 741 op-amp. Though very ancient, it still has many uses. This can use for…
May 18, 2007