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

Tom Wiltshire tom at electricdruid.net
Mon Feb 25 17:52:05 CET 2013

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.


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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