| Products > Test Equipment |
| Sigrok & $10 Logic Analyzer from Ali Express |
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| 2N3055:
--- Quote from: markone on November 28, 2022, 06:09:21 pm --- --- Quote from: JenniferG on November 28, 2022, 12:07:47 pm ---I bought this one from Amazon for $10.99 plus tax. https://www.amazon.com/gp/product/B099WJQV67 --- End quote --- It could be like this one : http://sigrok.org/wiki/VKTECH_saleae_clone Take in consideration that these clones have fixed voltage threshold and do not handle correctly signal over 5V in input, where the stage is a simple series resistor in the order of 100-330 ohms followed by a high value pullup resistor (usually 100Kohms), some models have also a small value capacitor toward ground and /or clamping diodes and sometime is present a logic buffer like HC245 in between inputs and FX2 chip. So, if you detach USB connector from the "dongle" it will absorb current from input digital signal lines trying to supply the LA ... ;) Apart that its worth the money. To be honest Sigrok based Pulseview is a very minimal LA application, it lacks some important features like trigger on serial content, that means a lot for serious debugging. Current Saleae Logic versione does it and I'm afraid that once you've tried it (Logic) you'll never go back (Pulseview), like all the all hobbyists in this forum :D --- End quote --- Sealae does not trigger from protocol in hardware sense. They keep running fast stream and filter in software until they see packet that fits filter. It is very clever but not real triggering. For slow protocols it ends up being same, though. |
| JenniferG:
--- Quote from: 2N3055 on November 28, 2022, 07:07:21 pm ---Sealae does not trigger from protocol in hardware sense. They keep running fast stream and filter in software until they see packet that fits filter. It is very clever but not real triggering. For slow protocols it ends up being same, though. --- End quote --- Perhaps Pulse View will be updated at some point to be able to do this? |
| colorado.rob:
--- Quote from: JenniferG on November 28, 2022, 07:29:33 pm --- --- Quote from: 2N3055 on November 28, 2022, 07:07:21 pm ---Sealae does not trigger from protocol in hardware sense. They keep running fast stream and filter in software until they see packet that fits filter. It is very clever but not real triggering. For slow protocols it ends up being same, though. --- End quote --- Perhaps Pulse View will be updated at some point to be able to do this? --- End quote --- Be the change you wish to see in the world. |
| markone:
--- Quote from: JenniferG on November 28, 2022, 07:29:33 pm --- --- Quote from: 2N3055 on November 28, 2022, 07:07:21 pm ---Sealae does not trigger from protocol in hardware sense. They keep running fast stream and filter in software until they see packet that fits filter. It is very clever but not real triggering. For slow protocols it ends up being same, though. --- End quote --- Perhaps Pulse View will be updated at some point to be able to do this? --- End quote --- Not that i know and I wouldn't hold my breath waiting for them to do it. If this function is a must for you, you have two choices : use your clone with Logic software, up to certain baud rate it will work like a charm if you have a decent PC, otherwise spend some more money in something that has local buffer and implement trigger mechanism at hardware level. I recently put my bet on DSlogic Plus (that now is on its way from China) because its producer "promises" that it works with a multi stage protocol trigger implemented at FPGA level. |
| mwb1100:
--- Quote from: markone on November 28, 2022, 07:51:32 pm ---I recently put my bet on DSlogic Plus (that now is on its way from China) because its producer "promises" that it works with a multi stage protocol trigger implemented at FPGA level. --- End quote --- Please post about how well it works after you've tried it out. |
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