Pages: [1]   Go Down
Author Topic: Is L7805 still needed when using an LM2596?  (Read 465 times)
0 Members and 1 Guest are viewing this topic.
Venezia
Offline Offline
Jr. Member
**
Karma: 1
Posts: 56
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

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!
Logged

Denmark
Offline Offline
God Member
*****
Karma: 15
Posts: 748
Please don't send questions as PM!
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

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.
Logged

Venezia
Offline Offline
Jr. Member
**
Karma: 1
Posts: 56
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

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.
« Last Edit: April 26, 2014, 12:33:27 pm by Daedalus1632 » Logged

Denmark
Offline Offline
God Member
*****
Karma: 15
Posts: 748
Please don't send questions as PM!
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

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

// Per.
Logged

Venezia
Offline Offline
Jr. Member
**
Karma: 1
Posts: 56
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

So is this correct?

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

thanks
Logged

Denmark
Offline Offline
God Member
*****
Karma: 15
Posts: 748
Please don't send questions as PM!
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Yes

// Per.
Logged

Offline Offline
Faraday Member
**
Karma: 100
Posts: 6014
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
(5Ah 30A)
Batteries are rated by Ah so what does the 30A represent ? (peak current max ?)
Logged

Arduino UNOs, Pro-Minis, ATMega328, ATtiny85, LCDs, MCP4162, keypads,
DS18B20s,74c922,nRF24L01, RS232, SD card, RC fixed wing, quadcopter

Offline Offline
Faraday Member
**
Karma: 100
Posts: 6014
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

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)
Logged

Arduino UNOs, Pro-Minis, ATMega328, ATtiny85, LCDs, MCP4162, keypads,
DS18B20s,74c922,nRF24L01, RS232, SD card, RC fixed wing, quadcopter

Venezia
Offline Offline
Jr. Member
**
Karma: 1
Posts: 56
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

This is the battery and this is the module
Logged

Offline Offline
Faraday Member
**
Karma: 100
Posts: 6014
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Oh , got it, you meant breakout bd. ok. cool.
Can you post the link where you got it ?
Logged

Arduino UNOs, Pro-Minis, ATMega328, ATtiny85, LCDs, MCP4162, keypads,
DS18B20s,74c922,nRF24L01, RS232, SD card, RC fixed wing, quadcopter

Venezia
Offline Offline
Jr. Member
**
Karma: 1
Posts: 56
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I bought it on Ebay =)
Logged

Offline Offline
Faraday Member
**
Karma: 100
Posts: 6014
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Thanks. That's a very convenient circuit.
Logged

Arduino UNOs, Pro-Minis, ATMega328, ATtiny85, LCDs, MCP4162, keypads,
DS18B20s,74c922,nRF24L01, RS232, SD card, RC fixed wing, quadcopter

Pages: [1]   Go Up
Jump to: