Help with driver

• Feb 27, 2012

• #1

laserpyro

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So I decided to build my own driver...

Ok apart from (probably) awful soldering what is wrong here?

All parts are from Rogs shopping list for a PHR

 

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Last edited: Feb 27, 2012

• Feb 27, 2012

• #2

Cyparagon

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Use your meter to find where you are losing all the voltage. My first guess is that you got the regulator pin-out wrong, but it could be a number of things.

 

• Feb 27, 2012

• #3

bobhaha

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You may also wanna check your diodes are all pointing the same way and are orientated the correct way relative to the driver.

 

• Feb 27, 2012

• #4

laserpyro

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Cyparagon said:

Use your meter to find where you are losing all the voltage. My first guess is that you got the regulator pin-out wrong, but it could be a number of things.

Click to expand...

Well I flipped the lm317... nothing

 

• Feb 27, 2012

• #5

piferal

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If I remember correctly the connection sequence of this component is: adjust - V-out - V-in.

So if I see well the photos, you have connected it in wrong way.

 

• Feb 27, 2012

• #6

laserpyro

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Ok so I've reduced the circuit to the basics but still nothing :S and I have used the test load before and thats fine. Started again with fresh component, tried rotating polarity of each piece but I can't seem to get this

 

• Feb 27, 2012

• #7

Blord

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Sorry but your pictures are not good enough for troubleshooting. We need to see more in details, like individual pins of the LM317.

 

• Feb 27, 2012

• #8

Cyparagon

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You haven't used your meter as I requested. That is the simplest way to show which component is not working as intended. I suggest again you try that. Which regulator are you using?

 

• Feb 28, 2012

• #9

laserpyro

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Cyparagon said:

You haven't used your meter as I requested. That is the simplest way to show which component is not working as intended. I suggest again you try that. Which regulator are you using?

Click to expand...

LM317LZ

Also I just did what you said but it doesn't seem lose voltage anywhere.
But still 0 on the test load.

 

• Feb 28, 2012

• #10

Fretwrecker94

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What amperage do you plan on driving the PHR at, out of curiosity. Because the LM317 you're using only supplies up to 100mA. So try setting it up with a >12.5 ohm resistor to see if you get any results.

 

Last edited: Feb 28, 2012