Relay Computer power supply requirements

[Paul Schmidt]

I am starting to assemble the parts to build the Relay Computer, and would like to know in advance what the power supply specifications are (or need to be). I already know that I need a supply at 12VDC regulated, with a 5.5mm barrel plug, but I don't know the current requirements. I don't see this mentioned anywhere in the documentation. Once I built the PCB, I can empirically learn the required current by testign with my bench supply, but I would prefer to buy a suitable supply now while I am ordering parts. Any info is welcome!

[Joe Allen]

I recommend a 2A supply. It uses around 1.25 A, but you want some headroom
in case you use 12 V for external I/O (there are terminals for this).

Thanks,
Joe

On Sun, Mar 3, 2019 at 11:15 AM Paul Schmidt paulschmidt@users.sourceforge.net wrote:

I am starting to assemble the parts to build the Relay Computer, and would
like to know in advance what the power supply specifications are (or need
to be). I already know that I need a supply at 12VDC regulated, with a
5.5mm barrel plug, but I don't know the current requirements. I don't see
this mentioned anywhere in the documentation. Once I built the PCB, I can
empirically learn the required current by testign with my bench supply, but
I would prefer to buy a suitable supply now while I am ordering parts. Any
info is welcome!

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Relay Computer power supply requirements

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[Paul Schmidt]

Thanks Joe

I have 'conformed' the BOM to my tastes, and also to an all-Digikey
sourcing.

I also added the power supply, changed the LED display to red, and added a
red Lexan filter(s) for them.

I will be happy to send the Excel file if you would like to have it.

Paul

From: Joe Allen [mailto:jhallen@users.sourceforge.net]
Sent: Sunday, March 03, 2019 11:01 AM
To: [relaysbc:discussion]
Subject: [relaysbc:discussion] Re: Relay Computer power supply requirements

I recommend a 2A supply. It uses around 1.25 A, but you want some headroom
in case you use 12 V for external I/O (there are terminals for this).

Thanks,
Joe

On Sun, Mar 3, 2019 at 11:15 AM Paul Schmidt
paulschmidt@users.sourceforge.net wrote:

I am starting to assemble the parts to build the Relay Computer, and would
like to know in advance what the power supply specifications are (or need
to be). I already know that I need a supply at 12VDC regulated, with a
5.5mm barrel plug, but I don't know the current requirements. I don't see
this mentioned anywhere in the documentation. Once I built the PCB, I can
empirically learn the required current by testign with my bench supply, but
I would prefer to buy a suitable supply now while I am ordering parts. Any
info is welcome!

---

Relay Computer power supply requirements
https://sourceforge.net/p/relaysbc/discussion/general/thread/5e2c0b033b/?li mit=25#5904

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Relay Computer power supply requirements
https://sourceforge.net/p/relaysbc/discussion/general/thread/5e2c0b033b/?li mit=25#5904/c8d4

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