[sdiy] Logic Analyzer Advice

[grant musictechnologiesgroup.com]

I too have an Intronix, but I find their use of USB A Male to USB A Male to be not endearing.  These days I just grab the $10 to $15 logic analyzer clone I got off eBay or Amazon and use the Saleae Logic PC application with it. I'm using it right now with some I2C slave stuff and it has been super useful (but truth be told, my Rigol scope can decode I2C as well).

GB


------ Original Message ------
From "Andy Lambert via Synth-diy" <synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>>
To "charlie" <charlie at finitemonkeys.com<mailto:charlie at finitemonkeys.com>>
Cc "SDIY" <synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>>
Date 5/16/2025 10:53:19 AM
Subject Re: [sdiy] Logic Analyzer Advice

I really like the Intronix Logic Port PC based system. The hardware can often be found to cheap on eBay.

https://www.pctestinstruments.com/

On Fri, May 16, 2025, 1:41 PM charlie <charlie at finitemonkeys.com<mailto:charlie at finitemonkeys.com>> wrote:
sigrok is a great resource. https://sigrok.org/wiki/Main_Page the protocol decoders page will give you a lot of examples of what can be done and lots of hardware on there to choose from.

https://sigrok.org/wiki/Supported_hardware#Logic_analyzers

you can get them super cheap since its basically a usb  gpio gateway i've seen them as cheap as 10-1$ usd on amazon

On Fri, 16 May 2025 at 10:26, Terry Bowman via Synth-diy <synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>> wrote:
I need to repair some old frequency counters and whatnot. It sounds like a job for a logic analyzer but I've never actually used one.  What would be wonderful is the ability to put a clip on the counter DIP, tell it what chip it is and then watch it count away in hexadecimal. Someone told me that this is "decoding" the data which makes sense. Anything that doesn't require me to do any mental gymnastics is ESSENTIAL. I'm not rich but I'll pay for what I need. Anything less is a waste of time.

What would be best for this? I'm sure there are factors that I'm not even aware of. PC based is an option as I'm going to put a 32" monitor on my bench. I have a line on a beautiful old HP DSO that's a dream to use and has one built in but there's no "decoding".

The counters in question have Nixie tubes in them. Some go down to 1Hz so they're not bad for fooling around with trans-AF. I have an LED model that I'll practice on first.


Terry Bowman, KA4HJH
"The Mac Doctor"

https://www.astarcloseup.com

#1: There is no substitute for good tools;

#2: Always use the right tool for the job.

Linn Westcott

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