Feb 15, 2016 · I have used a scope probe connected as shown to trigger on an ESD test pulse (connecting directly to the DUT is risky, as the ESD could damage the scope). Additionally, you can use the probe to find an area of a circuit that that is radiating excessively (set scope to show FFT, wave the probe around over the circuit).

Aug 23, 2021 · A probe built around: 2-3 feet of PVC (I want to say 1/4" but it isn't particularly crucial) A sacrificial voltmeter probe (CRT anodes are under a rubber "cap" so you need something narrow enough to get in under that) A 2MΩ 20W resistor (about the size of my pinky finger, and the hardest part to find by far)

For 30V at 1000 uF energy = 0.5CV^2 = 0.5 x E-3 x 900 ~= 0.5 Joule . A Joule is ~ the energy dissipated in dropping a 100 gram mass 1 metre so 0.5J = 100 gram x 500 mm. Just as a drop of something like that MIGHT eject a small particle so shorting a cap with that energy JUST MIGHT do the same. \$\endgroup\$ –

The moment it leaves your vision your hand positioning gets much worse. If you can hold a probe to a 0.1mm spot when seen. Your probably closer to 2mm unseen if you cannot stab the board for some feedback. Use something similar to varnish or heatshrink to make sure only the very end of the probe is conductive.

Oct 28, 2014 · If you want a more reliable way to generate these "ad hoc" scope probe ground jacks, check your local hardware store for some wooden dowel stock in the nearest size smaller than the probe body. Then, when you wind the wire around the dowel stock, the resulting "spring" will be smaller than the probe body.

Jun 26, 2023 · Solution: Using the auto set feature on the FNIRSI 1013D oscilloscope without a voltage across the probe leads (i.e., shorting gnd lead to signal on the probe) will brick the scope. I was recently playing with an Arduino Nano and testing someone's code with a scope probe (FNIRSI 1013D). The scope probe's ground was set to ground on the Nano.

The ground clip on your o-scope is actually tied to ground. it is a hard short and rather low resistance. This means that you are shorting the 3.3 rail to ground with your ground probe. To fix this there are two options, Put the resistor in the return path so that one side of it is ground. That way the ground probe does not hurt it.

Aug 2, 2016 · We all know what happens when we ground a regular oscilloscope probe at the wrong place: a short. There are two main points to consider: 1) All channels share the same ground plane, so we can't take 2 or more simultaneous measurements referenced …

This approach connects the scope probes such that the arbitrarily chosen point (point P4 in the diagram) in the circuit to connect the scope grounds to should be some point that is NOT also connected to any of the scope probe signals, or to any of the scope probe grounds. This does connect mains ground (scope ground) to that same point.

Apr 22, 2013 · Can't count the number of times I've accidentally put one probe a bit too close to both Vcc and Gnd! - it never stopped the circuit from working though \$\endgroup\$ – Matt Taylor Commented Apr 22, 2013 at 9:33