Did the mod today with an Arduino Uno and the sketch provided by jayjr1105, on reply #550 (pag23)
WARNING: Don't try this at home ![Scared :scared:](https://www.eevblog.com/forum/Smileys/default/scared.gif)
I didn't solder any wires or used a clip. Just poke the pins into the 5 holes (they made good contact) and secured the one for reset, firmly against the capacitor (that goes to pin 55 of the DM1106)
You have been warned.One thing that I've not read anyone talk about is about capacitance measurement (I read all the 26 pages, but sure some of the replies "in diagonal"). I didn't done any thorough test on accuracy. It seem fairly OK, but I was surprised by how fast the big capacitance as measured. An Amprobe AM-530-EUR take ages to measure the mF range. This got the job done for 40mF in few seconds.
Thanks to everyone that has given any kind of contribute for this mod to be at this stage.
I'm still thinking about Joe Smith's hack that stretched this probe up to 100KHz BW. Didn't quite get how it was done, but someone here (sorry I don't recall the nick) suggested a replacement of the quad op-amp OPA4330 for a AD8630. It has much higher BW. Despite the high cost of the op-amp compared to the low cost of the clamp, anyone has tried something like this?