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Old 01-26-2008, 01:27 AM #1
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Default 1st driver

hi this is my first driver i ever made i was woundering would this work for a blu-ray my 9 voilt batt is at 8.54 voilts and at the wires its reading 7.12 would this work if i get newer batt
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Old 01-26-2008, 01:50 AM #2
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Default Re: 1st driver

It should work with that battery for a while. Are you using a 33 ohm resistor? The voltage on the output doesn't mean anything unless you have a load across it.
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Old 01-26-2008, 01:59 AM #3
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Default Re: 1st driver

yes it a 33 ohm resistor
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Old 01-26-2008, 06:00 AM #4
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Default Re: 1st driver

Have a look here
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Old 01-26-2008, 09:14 AM #5
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Default Re: 1st driver

On the thread, linked to above by A-P-I, take special note of Post 7 from chimo, he suggests replacing the 4 diodes with 100ohm resistor when testing the circuit for blue ray LD's.

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Old 01-26-2008, 08:01 PM #6
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Default Re: 1st driver

i put a 100ohm resistor on my two wires where i would hook up the diode for a dummy load and im getting 3.67 voilts and my batt is 8.31 voilts what do i need to do to make it higher for a br ?
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Old 01-26-2008, 08:27 PM #7
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Default Re: 1st driver

Quote:
Originally Posted by jake21
i put a 100ohm resistor on my two wires where i would hook up the diode for a dummy load and im getting 3.67 voilts and my batt is 8.31 voilts what do i need to do to make it higher for a br ?
Jake, remember we are more interested in the current. I have calculated it using your voltage measurement and resistor.

3.67 divided by 100 ohms = .0367 ma's. This is perfect, your driver is ok. Try doing this with different value resistors and see what you come up with.

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Old 01-26-2008, 10:10 PM #8
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Default Re: 1st driver

i tryed it on a 150 ohm resistor it was 5.28v divided by 150 = 0.0352
and 10 ohm resistor was 0.38v divided by 10 = 0.038
and 15 ohm resistor was 0.58 v divided by 15=0.386
and 47 ohm resistor was 1.80 v

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Old 01-27-2008, 12:50 AM #9
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Default Re: 1st driver

Yup, your driver is working. I am guessing the resistors you are using have a 5% tolerance which would explain the slight differences.
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Old 01-27-2008, 12:56 AM #10
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Default Re: 1st driver

yea i think so could i use any 9v batt or is there a special kind every one uses
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Old 01-27-2008, 01:35 AM #11
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Default Re: 1st driver

You can use any 9 to 12 volt battery. I honestly do not know how much higher than 12 volts you can go before the regulator begins to get too hot.
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