diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Power Supplies (http://www.diyaudio.com/forums/power-supplies/)
-   -   Schematics help, what component is this? (http://www.diyaudio.com/forums/power-supplies/162479-schematics-help-what-component.html)

hyperion007 3rd March 2010 12:13 PM

Schematics help, what component is this?
 
1 Attachment(s)
Hi,

I am planning on building this power supply but there is one component that I don't have a clue as to what it is. I think it might be a zener diode but I'm not sure, and I don't have a clue as to what it's value should be.

I have marked it in red and would really appreciate your inputs on this.

Thanks
/Daniel

east electronics 3rd March 2010 01:00 PM

its a zener diode

hyperion007 3rd March 2010 01:45 PM

Great! But then there was the question of what values these zener diodes should be?

hyperion007 3rd March 2010 02:17 PM

I found out that they are LM326-5.0 Voltage reference or LM329DZ/6.9V

gfiandy 4th March 2010 09:43 PM

Of those two I would think the 6.9V option would work better. As the amp is set up with a gain of 2 +/- the trim adjustment. 6.9 x 2 = 13.8 so you would need to trim the gain up only a small amount to reach 15V. If you use a 5V ref then the gain needs to be three which I think is outside the range of the circuit.

Regards,
Andrew

hyperion007 5th March 2010 03:49 AM

Thanks gfiandy! As you might have noticed, I am quite new to this. If you don't mind, I'm assuming that the trimming I need to be doing is only at the VR1 and VR2 to get the desired 15V output. As it happens, I did get the 6.9V options :) Thanks again Andrew!

gfiandy 5th March 2010 04:35 PM

Yes the trim I was refering to is that of the variable resistors VR1 and 2.

Best of luck with your build.
Andrew

hyperion007 5th March 2010 07:34 PM

Thanks a lot Andrew!


All times are GMT. The time now is 03:13 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2