Recent content by mww

  1. M

    convert Battery powered alarm to mains with battery backup?

    Start with the basics, are you using rechargeable NiMH batteries, or alkaline LR6 ? If NiMH, then yes you keep them on charge by feeding about the voltage you get at 80% charge. That means the cells stay at 80% but you are not actually charging them unless mains has been off and you need to...
  2. M

    Testing mAh of a battery?

    I use these: http://modelshopleeds.co.uk/catalog/product_info.php?products_id=19601 Also a linear regulator into a resistor is a constant current load, saves messing around with a spreadsheet, with the advantage of not overdischarging at the bottom end if you set it up right. Bill...
  3. M

    Thermal Imaging Camera Recommendations?

    Another option is a civil fire service imager from the likes of eBay, then refocus the lens to close in. That would be a 320x240 pixel image which is better for PCB than the 80x60 pixels in the likes of the Flir TG165. OK they add in a visible image to help, but close in the parallax will kill it.
  4. M

    E2V Argus thermal imaging camera battery/charger help

    A bit late but some background... The 'AA' option needs a different battery carrier (red labels) which does have springs etc for AA cells (LR6 or as suggested FR6 are OK) The 3rd pin is not a thermistor feed, it is a voltage to drive the battery indicator. In the 'AA' carrier it is a resistor...
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