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Understanding on How Switch Mode Power Supply Works

 
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Understanding on How Switch Mode Power Supply WorksSome of us like technician want to learn more about the Switch Mode Power Supply commonly called SMPS. This is a special type of power that uses a chopper transformer instead of an ordinary metal core transformer. We have to learn how this type of power supply works for us to  have knowledge on how to repair this switch mode power supply  if we will encounters problem related to power supply. According to wikipedia: A switched-mode power... [ Continue reading... ]

Nov
12

Making Our Very Own Isolation Transformer

 
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Making Our Very Own Isolation TransformerAccording to Wikipedia, "An isolation transformer is a transformer used to transfer electrical power from a source of alternating current (AC) power to some equipment or device while isolating the powered device from the power source, usually for safety." [caption id="attachment_145" align="aligncenter" width="498"] Photo Credits to: Mi25[/caption] Circuit Diagram of Isolation Transformer Using Two Transformer Making our very own... [ Continue reading... ]

Nov
12

Maintenance of Sanwa YX-360TR Plus SCHEMATIC Diagram

 
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Maintenance of Sanwa YX-360TR Plus SCHEMATIC DiagramFor those who are looking for a copy of the schematic diagram on this type of Analog Multitester and  other brand using the same circuit diagram, you can download the schematic diagram in here. credits to Deantyne [caption id="attachment_135" align="aligncenter" width="500"] credits also to: Deantyne[/caption] For more information about this topic, you can visit Elab Forum for the discussion about this kind of Analog Multitester and... [ Continue reading... ]

Jul
6

Easy Way of Testing a Laptop Backlight(CCFL) and Inverter

 
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Easy Way of Testing a Laptop Backlight(CCFL) and InverterWe will be concentrating on LCD Inverter and CCFL bulb. Laptop with black screen problem is commonly caused by: 1. a defective backlight, which is the cold cathode fluorescent lamp(CCFL) bulb 2. defective laptop's inverter board 3. no video output going to the LCD Screen It is not an easy job repairing laptops specially if we don't have parts that we can use to replace to the parts we are suspecting to be the culprit. So now, we... [ Continue reading... ]

Jul
5

Assembling a Pisonet Box (Sample Pictures)

 
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Assembling a Pisonet Box (Sample Pictures) Building own Pisonet with pictures to be used as guide and inspiration in building your very own Pisonet Unit. Bill Of Materials Used in the Assembly : 1 set pc - 12000 1 pc flywood - 870 timer - 250 coinslot - 180 paint and wirings - 500 speakers - 450 locks (mga kandado)- 300 glass - 120   And for the Prices and Specs for the Computer : Hdd Internal: wd 500GB (SATA 6Gb/s) PHP 2750.00 Memory: corsair vengeance... [ Continue reading... ]

Oct
29

PISONET Wiring Diagram

 
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PISONET Wiring Diagram   Here is diagram of the wiring of a Piso Net, which is popular here in the Philippines by using a PC with a Timer and Coin Slot to operate an Internet Cafe even without supervision because it is made to operate automatically. The main issue here is what signal or power source that you will cut to switch it using a relay. Some users are freezing the keyboard and mouse while other cut the signal or power line of the... [ Continue reading... ]

Feb
11

Build Your Own Automatic Car Battery Charger

 
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Build Your Own Automatic Car Battery ChargerThis is a project for those who want to build their very own  Automatic Battery Charger. This is a project made by one of  the member of  Elab Forum, duc_tech. But as a reminder, this circuit don't have a current limiter which means this charger is good to use only on a known good battery but not on a battery that have defects like having a short or open plates which will cause the diodes, switching Thyristor and transformer to heat easily.... [ Continue reading... ]

Dec
26

LCD Start Up Circuit

 
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LCD Start Up CircuitThis is an example how an LCD Start Up Circuit looks like. It shows the flow of the supply which switched on the circuit. This is only a very simple example and other start up circuit may looks more complicated than this one. We can make this image as a guide to give us an idea on how do a start up circuit of an LCD may looks like and how does it function. In this way, we now have the idea of the switching circuit of most LCD Monitor and all we... [ Continue reading... ]

Dec
1

Making A Transformerless Power Supply

 
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Making A Transformerless Power SupplyUpon surfing the net, I have found this site: http://electroschematics.com displaying their projects on making a Transformerless Power Supply with a 12 volts output voltage and a current of 100mA. We usually see this kind of power supply on a China made model of rechargeable products like flashlights and mosquito killer. This circuit catches my attention because of its application in our work which needs a power supply and we can also use... [ Continue reading... ]

Nov
20
 
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