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Old 07-27-2011, 09:32 AM #609
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Default Re: FS: Jibs Linear Drivers

They are meant for 6-9v thats why its soo low.
Quote:
Originally Posted by eytyxhs View Post
80mA? Only?
If use 4V on 1.3A and 1.8A Driver?


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Old 07-27-2011, 10:11 AM #610
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Default Re: FS: Jibs Linear Drivers

Quote:
Originally Posted by bhwollen View Post
They are meant for 6-9v thats why its soo low.
Jib did some testing and one of his 429ma drivers ran a LPC-815 at 429ma using 4.2volts

But, thats not the same with the Cattio diodes since they have a higher Vf

a 429ma driver would be excellent for a portable lab build since you could run it using a few 36650 cells in parallel if you want to take it somewhere and you can then just plug it back into your psu at home.

It also wont generate much excess heat since 4.2 volts is just right

(445 DIODES ARE DIFFERENT...) I dont want anyone getting mixed up between the two
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Old 07-27-2011, 11:36 AM #611
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Default Re: FS: Jibs Linear Drivers

I just Brought the 500mA.
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Old 08-02-2011, 08:42 PM #612
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Default Re: FS: Jibs Linear Drivers

I' trying to find which protection diode to use (I mean, which model). I'll set jibs' the drivers at 1.25A with a protected 18650 battery (max. 4.2v). Does anybody knows how to find the correct diode ? I went to the electronic's shop and they had lots of different models and they ask me for the model (for example 1N4001 Rectifier diode 1A 50v or 1N5400 @ 3A 50v).

1N4001
http://www.fairchildsemi.com/ds/1N/1N4007.pdf

1N5400
http://www.fairchildsemi.com/ds/1N/1N5408.pdf

About "50v", it means it can work up to that voltage ? so if it's working at 4v will have no problem or it will not work ?

(b)
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Old 08-04-2011, 02:03 AM #613
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Default Re: FS: Jibs Linear Drivers

Quote:
Originally Posted by megha View Post
I' trying to find which protection diode to use (I mean, which model). I'll set jibs' the drivers at 1.25A with a protected 18650 battery (max. 4.2v). Does anybody knows how to find the correct diode ? I went to the electronic's shop and they had lots of different models and they ask me for the model (for example 1N4001 Rectifier diode 1A 50v or 1N5400 @ 3A 50v).

1N4001
http://www.fairchildsemi.com/ds/1N/1N4007.pdf

1N5400
http://www.fairchildsemi.com/ds/1N/1N5408.pdf

About "50v", it means it can work up to that voltage ? so if it's working at 4v will have no problem or it will not work ?

(b)
You don't need a high amperage diode since its just a drain in the event of reverse voltage so a 1N4001 is fine.
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Old 08-04-2011, 02:08 AM #614
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Default Re: FS: Jibs Linear Drivers

***NEW, just added 100mA and 144mA drivers***

1.25A back in stock.
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Old 08-04-2011, 12:30 PM #615
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Talking Re: FS: Jibs Linear Drivers

Thanks again for your help ! (check your last reply I think is 1.25A instead of 1.25mA). (b)
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Old 08-04-2011, 12:50 PM #616
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Default Re: FS: Jibs Linear Drivers

Whoever tagged "***"... Grow up

How are you progressing on your boost drives Jib?

also, Would it be possible to use two 1.5ohm resistors in parallel so make a 1.65amp driver? I think that would be a good current for people who want high powers without compromising diode life too much...
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Old 08-04-2011, 05:17 PM #617
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Default Re: FS: Jibs Linear Drivers

Quote:
Originally Posted by megha View Post
Thanks again for your help ! (check your last reply I think is 1.25A instead of 1.25mA). (b)
Haha ... thanks, Thats what 3am does to the brain ... fixed.

Quote:
Originally Posted by LaZeRz View Post
How are you progressing on your boost drives Jib?
The last of the parts should be in today. If all goes well I should have the first batch done on Saturday.

Quote:
Originally Posted by LaZeRz View Post
also, Would it be possible to use two 1.5ohm resistors in parallel so make a 1.65amp driver? I think that would be a good current for people who want high powers without compromising diode life too much...
Is 1.63A close enough? If so I have the resistors to do it (1ohm + 3.3ohm).
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Old 08-04-2011, 06:49 PM #618
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Default Re: FS: Jibs Linear Drivers

I just tested the driver that I bought from you.. And it appears the diode is fried. It had 8.4 volts input, and 7.85 volts output going to the diode. A similar thing happened with my last driver. There appeared to be no resistance in either the diode nor the driver. So this is not far from powering the driver when its connected to nothing. Would this break the driver? (I dont want to order another diode, just to fry it with this driver).

Thanks,

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Old 08-04-2011, 07:40 PM #619
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Default Re: FS: Jibs Linear Drivers

Quote:
Originally Posted by AAlasers View Post
I just tested the driver that I bought from you.. And it appears the diode is fried. It had 8.4 volts input, and 7.85 volts output going to the diode. A similar thing happened with my last driver. There appeared to be no resistance in either the diode nor the driver. So this is not far from powering the driver when its connected to nothing. Would this break the driver? (I dont want to order another diode, just to fry it with this driver).

Thanks,

AAlasers
What? The output voltage doesnt mean anything since this is a current regulator. Did you hook it up to a test load and see what kind of current it is putting out?
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Old 08-05-2011, 12:08 AM #620
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Default Re: FS: Jibs Linear Drivers

The last test load I had does not work anymore. At the moment, I dont have a test load; I did not test the current output. But It SHOULD be outputting 1.3-1.6 amps. I connected it to the diode.. and the input voltage to the diode was 7.85 volts. 8.36 volts to the driver, from two 18350 batteries.
Neither the driver nor the diode was getting warm.

Thanks,

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Old 08-05-2011, 03:17 AM #621
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Default Re: FS: Jibs Linear Drivers

As Helios stated earlier, voltage is meaningless in a constant current driver. You are getting 7.85V because that is what the diode is demanding ... you really need to test it with a test load to see what really is going on.

Its cheap to make yourself a high power test load for 445, in fact shipping might cost more than the parts:
Get 4 of >>these<< and one of >>these<<.

Do you have a heatsink on the resistor side? If so, check to make sure they are not shorted by the heatsink.
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Old 08-05-2011, 04:02 AM #622
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Default Re: FS: Jibs Linear Drivers

In case people are looking: 1N5401 3 Amp General Purpose Rectifier ~1n4003 25 pcs | eBay

and 2 Watt 1 ohm 1R Metal Film Resistor R 2W (10) | eBay

Edit: That will allow up to 2A, with 1% tolerance, for under $5

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Old 08-07-2011, 08:08 AM #623
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Default Re: FS: Jibs Linear Drivers

444mA Driver it's ok for LPC-815?

Can you test the 1.3A DRIVER at 4.2V for red?
Which one Gives >400mA at 4.2V for red?
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Old 08-07-2011, 08:57 AM #624
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Default Re: FS: Jibs Linear Drivers

A lpc-815 will run fine with a 4.2volt cell.

When the voltage reaches about 3.8volts you start seeing dramatic current decreases so if your using a large cell like an 18650 your fine
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