| Products > Test Equipment |
| Need "flying wire" probes for small feature PCB probing? |
| (1/4) > >> |
| Faringdon:
Hi, AYK, when you probe a PCB with small chips and res/caps on it, you have to solder a "flying wire" to the 0603 resistor or whatever , and then clip the scope to that flying wire. We do this with a twisted pair of kynar wire, ..but then find the scope cannot be connected to the stripped ends of the kynar as the kynar is too thin.......but we need it thin so we can solder the other end correctly to the small feature PCB......so therefore we solder 2cm pieces of 0.7mm tinned copper wire to the kynar ends, and then connect the scope probe "hat" and gnd clip to these 0.7mm pieces. ..However, the 0.7mm tinned copper wire pieces keep falling off. We have thought of wrapping the kynar round the tinned copper wire, (then soldering it to the 0.7mm) and also wrapping some of the kynar insulation too.....then taping that to the tinned copper wire (or heatshrinking it), but that will mean ages spent making such probes. Is there anything offtheshelf like this? We searched but cant find. |
| alm:
The big scope manufacturers like Lecroy, Keysight and Tektronix have been making active probes with solder down tips for a while. I don't know if the B brands like Rigol have caught up with these yet. These tips provide optimal signal integrity, but you probably won't like the prices. As intermediate, good passive probes will have (optional) adapters to 50 25 mil square pin connectors, which can be connected to small grabbers such as the EZ-Hook XKM series that will grab better to thin wires. |
| tautech:
--- Quote from: alm on December 17, 2022, 11:27:30 pm ---The big scope manufacturers like Lecroy, Keysight and Tektronix have been making active probes with solder down tips for a while. I don't know if the B brands like Rigol have caught up with these yet. These tips provide optimal signal integrity, but you probably won't like the prices. As intermediate, good passive probes will have (optional) adapters to 50 mil square pin connectors, which can be connected to small grabbers such as the EZ-Hook XKM series that will grab better to thin wires. --- End quote --- 25 mil actually is the standard grabber size. ;) |
| alm:
--- Quote from: tautech on December 17, 2022, 11:32:28 pm ---25 mil actually is the standard grabber size. ;) --- End quote --- You're right, fixed. Does Siglent have solutions for solder in probes, or passive probe to 25 mil square pin adapters that have prices not quite as eye-watering as the A brands? |
| Martin72:
Hi, I got these ones : https://warwickts.com/1298/PJP-6800-KIT-Micro-Pincer-SMD-Clip-Kits They are very, very small...Post pics later on. |
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