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OPEN Power (Prototype 1)

I didn't have enough to buy a Lab Bench PSU... So I made one.

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Prototype 1: Simple Constant voltage Power Supply Variable from 0.6V to 12V.


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Any one with Switching Regulator Experience Please Contact me. Would appreciate any assistance.

This Project is to produce 3 final Prototypes. All Power Supplies will have USB Charging of Lithium Batteries and a Load Sharing. 

Prototype 1: Simple Constant voltage Power Supply Variable from 0.6V to 12V. Will Include 5V and 3V Rails. Voltage indicator will be achieve using Comparators and LED Array 

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Keith Olson wrote 05/03/2019 at 04:34 point

FWIW, Instead of a knob, using 8 jumpers would give you the ability to set 0.1v - 11.9v directly, by using (modified) binary addition.  The major would be set up as 1-2-4-4 (0 - 11) and the minor would be set up as 1-2-2-4 (0 - 9).  For example, a 3.3v setting could be 1100 1100, while a 7.5v could be [1101 1001].  Making one of the major jumpers 8 instead of 4 would allow going up to 16v, and additional major jumpers would allow for even higher voltages.  LED's wouldn't be needed, as the voltage would be visibly displayed.

Does that make sense?

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Aiden Fang wrote 04/23/2019 at 01:19 point

Wow! Great job! The color scheme looks very attractive. What software did you use to make the drawing?

Thanks!

Aiden

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Ubi de Feo wrote 04/21/2019 at 07:06 point

Lots of great work going on here :)

I mostly use breadboards with 6 columns per side, rather than 5, and most of these adapters are useless in this case.

Not long ago I was wondering if there'd be a way to make the power rails adaptable to multiple sizes.

Food for thought, I guess ;)

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John Loeffler wrote 04/21/2019 at 10:10 point

do you have a picture I could use for reference?

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Arsenijs wrote 04/20/2019 at 17:09 point

Consider using 4-resistor arrays, it might allow you to save a bunch of board space and simplify the BOM.

https://p.globalsources.com/IMAGES/PDT/BIG/251/B1064309251.jpg

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John Loeffler wrote 04/20/2019 at 19:33 point

Thank you that is exactly what i need

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Jan wrote 04/18/2019 at 20:21 point

Nice idea. The LED thing is a bit over the top though and occupies much board space! 4x LM339?!?!?!
I wonder how you want to route that thing, there is next to no space for traces in the current design. Using 4 layer boards might work though...

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John Loeffler wrote 04/19/2019 at 01:16 point

It is routed on a 2layer.  I have gotten pretty good at routing manually over the years.  Check out my prototype 3 it uses an 0.96 color Toft display and has loads more features.

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Lukas wrote 04/15/2019 at 08:48 point

Great idea, i need this for my breadboard.

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testsubj wrote 04/11/2019 at 18:56 point

There's already some similar boards on Aliexpress that do this. I didn't look for an adjustable version, but the ones that only output 3.3/5 cost less than $1 shipped.

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John Loeffler wrote 04/11/2019 at 18:59 point

I love those.  This is usb powered with Lipo backup, as well as continuously adjustable and 5v and 3.3v rails

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Dan Maloney wrote 04/11/2019 at 15:12 point

Agreed - great idea. You should really enter this is the Hackaday Prize - this would make a great product!

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John Loeffler wrote 04/11/2019 at 15:15 point

Thanks I will,  Check out my Prototype 3.  It has more bells and whistles.  This version is a simple non Micro controller version. Right now the cost of components is less than $4 in low quantity.

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L W wrote 04/10/2019 at 20:37 point

Great idea!

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