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 Daylight sensor switch circuit.

Wednesday, February 5th, 2014

My wife would like to control an Air pump (looked like this projects), to works only daylight hours. To save electricity and help extend the use of the air pump. I so select a light switch controller Because there are less devices and easily build. Which is circuit diagram below: Figure 1 the daylight sensor […]


 Drive relay by digital circuit

Sunday, February 2nd, 2014

Use an output pulse from a digital circuit to controls transistor ON and drive the relay as switch ON-OFF to any circuits or external devices. The Controlling electronic circuits, Electrical devices in homes or factories. We often use the relay It is a first, though very ancient, relay still have many uses. A general Relay […]


 DIY Circular Saw table

Friday, January 31st, 2014

Woodworking is an activity that I enjoy very much. The secondary from the electronics. But I did not study directly. So View from youtube mainly. Wood cutting is very important. If it does not cut straight or 90 degrees. When assembly is a piece of work, a lot of problems. Cutting by hand, though, to […]


 Cheap Rechargeable 12V 7AH Battery

Friday, January 31st, 2014

Today I login my affiliate-program.amazon.com see some order good for everyone. “Rechargeable 12V 7AH Sealed Battery” List Price: $54.90 Now Price: $9.81 You Save: $45.09 (82%) It very cheap battery for make many projects. Normally battery life for 2-3 years. It is a pity, I do not live in the USA. Hoped that This story […]


 The logic gate without IC

Thursday, January 30th, 2014

The past, we’ve used only a digital logic circuit by IC. But, in truth. We do not need any Ics, may use Switch or Diode or transistors connected as a logic circuit. Try to see Figure 1 which use switch and diode connected as AND and OR gate , To make us understand the meaning […]



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