dim bulb tester

[manicdoc]

Just a dim bulb tester I put together, there was an earlier version but the bulbs were on top, so it wasn't stackable, plus I couldn't see what the power draw was easily and if it was stable/as expected.



The meter is a unit I got off aliexpress, measures voltage, current, power factor, frequency, power, etc - plus sums over time. The two small switches cut in the bulbs, so I have a choice of 40w,100w or 140w before it cuts in and saves the DUT.  The banana socket is to Earth via a 100k resistor, so can be used for static suppression if needed (although never been a problem). The box is one I put together out of offcuts I had lying around, so its ended up built a bit like a brick dunny!

The device stacked atop is a Keithley 2000 that I fixed (someone had a go at it before and their soldering and diagnosis wasn't up to it). To the right is a HP func gen and a Agilent DC source/battery simulator in effect, both I fixed as well (bad contacts on the HP and a bolt in the wrong place on the Agilent...). To the right is a dual rail bench power supply (built from a kit) and a Rigol 4 channel oscilloscope.

[MarkF]

See what others have done:

  https://www.eevblog.com/forum/beginners/dim-bulb-current-limiter-prototype/

[manicdoc]

Thanks for that, I see some people have really gone to town on it. In my case I wanted something that fitted in, dimension & stack-ability wise, with the other kit.