120W Power inverter

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120W Power inverter

Post by ultrasonic™ on Thu Aug 19, 2010 11:18 pm

This Circuit Design is one of the most cheapest inverter i ever had. its containing a square wave design using a 555 as a timer, and a 7404 to provide alternating pulses for the transformer windings. The 2SD880s and 2N3055s work as a Darlington pair to amplify the signals coming from the logic chip, and the 2N3055 do the hard work of switching the current. They are rated at 15A max, 10A is a safe operating value, that gives around 120W of power at 12V. They should be mounted on proper heatsinks with proper electrical isolation (the collector is the transistor's body).



Take Note:


naay kulang sa diagram nga two protection diodes. kng wla na xang duha ka diode it can cause na madaot ang emng power transistor after a few seconds of operation. kanang two diodes kay itaod ninyo between sa ground ug sa collector terminal sa 2N3055's both side, in reverse, so they normally won't conduct.



PARTLIST:

Transformer 12V center Tap (approx. 12Amps)
2pcs. 2N3055 NPN Power Transistor
2pcs. 2SD880 NPN Transistor
2pcs. AN4662/1N4007 Rectifier Diode
1pc. LM555 timer IC
1pc. 7404 inverter ic (Logic)
1pc. KA7805 regulator (5V)
1pc. 1000uf/25V or 470uf/16V e. caps
1pc. 10uf/16V or 100uf/16V e.caps
1pc. 150kilo ohm resistor 1/4w
1pc. 1kilo ohm resistor 1/4w
2pcs 100ohm or 400 ohms 1/4W


Construction:

testing for the 7404's output using two pairing of LED






testing the power transistor using two automotive 12V 20W bago itaod ang Transformer


Final Testing Before Finishing (^_^)


Final Output:

kayo na bahala sa Box Enclosure













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Re: 120W Power inverter

Post by zandertech on Tue Nov 15, 2011 1:54 am

nice to ah ,..thanks sa sharing boss ,. kaso dili ko gyud maintindihan ung bisayan word na iba hehehe,..pano po pla ung koneksyon ng ic 7407?

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Re: 120W Power inverter

Post by Digitap on Wed Nov 16, 2011 6:51 pm

ganito po yata waiting


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Re: 120W Power inverter

Post by zandertech on Wed Nov 16, 2011 8:36 pm

ai ganun pla ,...thanks miss ganda Very Happy

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Re: 120W Power inverter

Post by mars_828 on Thu Aug 09, 2012 12:58 pm

pano po pla ung koneksyon ng ic 7404 ung pin assignment?. at anong value ng resistor na nakakabit sa 555 timer?

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Re: 120W Power inverter

Post by mars_828 on Thu Aug 09, 2012 7:56 pm

mars_828 wrote:pano po pla ung koneksyon ng ic 555 ung pin assignment?. at anong value ng resistor na nakakabit sa 555 timer?

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Re: 120W Power inverter

Post by ultrasonic™ on Thu Aug 16, 2012 10:50 am


sori ngyon ko lng ito napansin... my kulang sa diagram at my mali rin.. redit ko muna

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Re: 120W Power inverter

Post by danny on Thu Aug 16, 2012 4:26 pm

ultrasonic™ wrote:
sori ngyon ko lng ito napansin... my kulang sa diagram at my mali rin.. redit ko muna

meron kang modified sine wave?

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Re: 120W Power inverter

Post by Digitap on Sat Aug 18, 2012 2:15 pm

sir ito ang kulang diba?

connect pin6 and pin2
connect pin8 and pin4
resistor 150k on pin8 and pin7
resistor 1K on pin7 and pin6

Razz

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Re: 120W Power inverter

Post by ultrasonic™ on Sat Aug 25, 2012 3:09 pm


sapol mu princess (^_^

danny wrote:
ultrasonic™ wrote:
sori ngyon ko lng ito napansin... my kulang sa diagram at my mali rin.. redit ko muna

meron kang modified sine wave?

nku wla akng modified ~ wave sir

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Re: 120W Power inverter

Post by DJFEL on Tue Jul 30, 2013 7:48 pm

eto yong 120 watts inverter ko...2nd yr collage pa to..binohay ko ngayon..
 

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Re: 120W Power inverter

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