[sdiy] My new M200 Dual Supply Voltage Monitor module...

[Jean-Pierre Desrochers]

Hi Tom,
Your replies are always appreciated..

I chose not to check for over-voltages.. specially for the
digital +5vdc since if it goes too high the uP won't like that
long enough to show a High voltage malfunction on its LED.. ;-(
As you stated I could have chosen +2.5vdc as a ref for the A/D.
Again I was more interested in the instantaneous values around the 
normal
DC line voltages and down to 0.10v below them.
I use that uP A/D bits much around these values (A/D +ref=+5vdc  
-ref=+4.80vdc).
But, for example, I could have check for too high values and blink
the associated LEDS accordingly.

I just hope this circuit could help
start more elaborated Voltage Monitor projects..
I didn't find anything about this synth oriented
purpose on the web.
JP




Le 2013-02-25 11:52, Tom Wiltshire a écrit :
> Hi JP,
>
> One thing struck me about your design. I see you're measuring the
> "correct" voltage around +5.00V, but this point is fairly arbitrary
> since you've scaled the voltage down from +15V or scaled and inverted
> in the case of -15V. Given that it is arbitrary, why use 5V as the
> reference point? - it's right at the end of the DACs range, and you
> won't be able to detect over voltage conditions (since you'll just 
> max
> the DAC out). If you used 2.5V as the reference level instead, you'd
> be able to see if it went too high too.
>
> Aside from that, I thought it looked good. It's an easy design to
> understand, and the flexibility of doing the detection with a uP 
> gives
> you a lot of options.
>
> Regards,
> Tom
>
>
>
>
> On 25 Feb 2013, at 13:30, Jean-Pierre Desrochers <jpdesroc at oricom.ca> 
> wrote:
>
>>
>> Here are the module specs:
>> 
>> http://www.arcenson.com/projects/Modular/M200-201-202-203_Power_Supply_Modules/M200_Voltage_Monitor/Specifications/M200_Voltage_Monitor_specs.pdf
>>
>> Here is the schematic for one of the M200 voltage monitors:
>> 
>> http://www.arcenson.com/projects/Modular/M200-201-202-203_Power_Supply_Modules/M200_Voltage_Monitor/Specifications/M200_Voltage_Monitor_Top_Cabinets_Schematic.pdf
>>
>> PCB Details:
>> 
>> http://www.arcenson.com/projects/Modular/M200-201-202-203_Power_Supply_Modules/M200_Voltage_Monitor/Specifications/
>>
>> Your comments are SO WELCOMED !!!
>> J-Pierre
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