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barryforever
Joined: 15 Aug 2007
Posts: 43
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 17 May 2008 13:22 power supply 24 volt,12 volt,5volt diagram |
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Helloo..
Im new to the field of microcontrollers..
Im interested in developing a ECU and i have planned to use microchip PIC Midrange controllers ... I did connect the chip to my rectified dc 12 v ..
Before connecting i should have checked the amps but i dint it showed 1.2 amps
i fried the chip..
can some one post a power supply circuit for the microcontroller..
I think the microcontroller needs 5v and 100ma ..
can some one post a diagram
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blueroomelectronics
Joined: 17 Sep 2006
Posts: 1681
Helped: 99
Location: Toronto, Canada
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18 May 2008 16:25 power pic24 5 volt |
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A simple LM7805 will work fine.
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18 May 2008 16:25 Ads |
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Sayem Ahmed
Joined: 07 Apr 2008
Posts: 47
Helped: 3
Location: Dhaka,Bangladesh
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19 May 2008 4:23 5v 100ma power supply circuit diagram |
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You will need some power for your circuit, preferably a stable +5 Volt. If you don't have a real power supply I recommend using a wall-wart (a big line plug with a transformer) plus an 7805. The circuit is dead simple (see attach image) and will work for all wall-warts that provide either 8 .. 24 Volt AC or 12 .. 32 Volt DC. A 7805 is both short-circuit and thermally protected, so it is difficult to damage. If you want to draw substantial current from this circuit you should use a wall wart with a lower output voltage, and put a big heat sink on the 7805.
Other options to obtain power are:
1. a PC game port or USB port (your PC might be damaged when you draw too much current!)
2. a 9 Volt battery + an 7805 (be sure to disconnect the battery between experiments, otherwise the 7805 will drain the battery quickly)
3. a 4.5 Volt battery (not for the 16F84 - the one without A -, and at most at 10 MHz, preferably at 4 MHz or lower)
4. Finally you can use a pc power supply as your LAB power supply(Now I am using it & it is a great idea.).You may find -5V,5V,3.3V,12V,-12V,17V(using -5V & 12V),10V(using-5V,5V),24V(using-12V&12V)and many more you need.You may also have 400W or more power for your big project.Just a simple modification needed for it. If you interested I will help you.
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barryforever
Joined: 15 Aug 2007
Posts: 43
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19 May 2008 4:56 power supply diagram |
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i do have a supply which gives me only 12 v and 1.3amps of supply
how can i bring it down 5v 100ma
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randell_xtian
Joined: 25 Mar 2008
Posts: 158
Helped: 9
Location: Philippines
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19 May 2008 4:56 pic power supply circuit 7805 |
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the 78L05 is the right power supply for IC's. please check this document and see the application for added information:
http://www.edaboard.com/viewtopic.php?p=938103#938103
regards,
randell_xtian:D
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