Logic Analyser Work in Progress

Sebastian_Oort · July 27, 2021, 8:58pm

I thought it would be cool to have a small 8bit logic analyser as a module. So i’ve grabbed KiCad and i’m currently cloning something like fx2grok - sigrok to a module.

Nowhere near final, and not on a github currently, but i really enjoy thinking about these modules so i had to give it a go! Let me know what you think.

The right-angle headers should be replaced by laying a strip of straight headers flat to save vertical space.

Sebastian_Oort · July 28, 2021, 8:30am

Update! shortened the board and replaced the pinheader. It’s a hack, but it should work

Schematic is complete i think. Board layout will take some more time to place components and then route the traces.

Sebastian_Oort · July 28, 2021, 11:28am

and another update. Did a first attempt at routing, replaced the eeprom with a much smaller package. Not sure if i’ll keep the LED. Also i want to test the option of making this a 16bit LA, or having some extra trigger pins. Not sure yet how, would need to make a mockup with a bit of PCB in the case first.

Sebastian_Oort · July 28, 2021, 12:00pm

And i’m on a roll. Without my testing i just added a second row of pins. It’s now a 16bit logic analyser. Removed the eeprom as it isn’t needed for sigrok.

ImaxinarDM · July 28, 2021, 8:04pm

Great to see you working on this.
My 2 go-to’s are always a logic analyser & communications analyser.

feesh · July 28, 2021, 8:24pm

This looks awesome!!

nrp · July 28, 2021, 9:34pm

This is awesome! We’ve seen these work really well for pin headers as well if you want to avoid having pins sticking out https://www.digikey.com/en/products/detail/preci-dip/8FM-78-0010-02-146/4140634

ImaxinarDM · July 29, 2021, 7:00pm

I like the idea of the pins not sticking out. I may be a good engineer, but I am also a klutz and anything sticking out of an expansion module I would snag at some point. The part @nrp highlighted looks good for that.

hallmar · June 2, 2022, 2:33pm

I agree, I would probably find some way to snag my wool sweater and bend pins.

This project looks soooo cool! Anything that enables me to analyze i2c, i2s and UART directly on my laptop would be great. Even as a standalone device this is cool as heck

Luke_Paulson · June 2, 2022, 3:44pm

You could use a female header whose pins sandwich the boards, I did the same things for a module I’m working on