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Topic: Is L7805 still needed when using an LM2596? (Read 635 times) previous topic - next topic

Daedalus1632

Hi there!
I'm creating my first standalone project that has to be mounted in my motorcycle.
The power supply will be a 12V battery (5Ah 30A), so I need to convert from 12 to 5V.
I bought an LM2596, but since I'm a complete ignorant, does it need the help of an L7805 or it does all the job alone?
Also, on the LM2596 there are IN+, OUT+ and IN-, OUT-, what is the difference?

Thank you guys for your help and time!

Zapro

Unless you bought the LM2596 component alone, you have a board using the LM2596.
In that case you will use that, and ditch the 7805.

The In/Out- are the negative (ground)-terminal.

// Per.

Daedalus1632

#2
Apr 26, 2014, 07:29 pm Last Edit: Apr 26, 2014, 07:33 pm by Daedalus1632 Reason: 1
Ye, sorry, I mean I bought the whole LM2596 module. So I don't need the L7805.

I just didn't understand that thing about IN/OUT +/-. Shouldn't the ground be only out? I'm confused.  :smiley-red:

Thank you.

Zapro

The ground is common, so  it doesn't matter.

// Per.

Daedalus1632

So is this correct?

Battery+  >>  IN+  >>  OUT+  >>  Arduino5v >>  OUT-  >>  IN-  >>  Battery-

thanks

Zapro


raschemmel

Quote
(5Ah 30A)

Batteries are rated by Ah so what does the 30A represent ? (peak current max ?)
Arduino UNOs, Pro-Minis, ATMega328, ATtiny85, LCDs, MCP4162, keypads,<br />DS18B20s,74c922,nRF24L01, RS232, SD card, RC fixed wing, quadcopter

raschemmel

Quote
I bought an LM2596, but since I'm a complete ignorant

You DID buy all the support components right ? (1N5824, 33uH coil,(5A), 230uF cap, 680uF cap)
Arduino UNOs, Pro-Minis, ATMega328, ATtiny85, LCDs, MCP4162, keypads,<br />DS18B20s,74c922,nRF24L01, RS232, SD card, RC fixed wing, quadcopter


raschemmel

Oh , got it, you meant breakout bd. ok. cool.
Can you post the link where you got it ?
Arduino UNOs, Pro-Minis, ATMega328, ATtiny85, LCDs, MCP4162, keypads,<br />DS18B20s,74c922,nRF24L01, RS232, SD card, RC fixed wing, quadcopter


raschemmel

Thanks. That's a very convenient circuit.
Arduino UNOs, Pro-Minis, ATMega328, ATtiny85, LCDs, MCP4162, keypads,<br />DS18B20s,74c922,nRF24L01, RS232, SD card, RC fixed wing, quadcopter

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