John's blog

Talking about technology (mostly)

I got two of these Resistance Box 0-9999.9Ω Adjustable Lab Resistor Substitution Box Precision 1W Variable Knob Switch Boxes from AliExpress, but they kind of suck a bit. The resistors are only 1/4 Watt, the precision only 5% or 10%, and I had to mod it myself to replace the terminals with banana sockets.

Today I came across Build a Pro Decade Resistor Box for Cheap! PCB & 3D Print Files Included which includes all the plans necessary to make my own resistor box and with 1 Watt resistors.

I might take this on some time.

I plan to binge watch all of these videos: @OpenTechLab. I hope I can find the time!

I want to learn more about sigrok and OpenTechLab seems like a good place to start…

I found this old series of videos from OpenTechLab which starts here: [001] Sigrok and Logic Analyzers.

There is more about sigrok over here:

In Build – gusmanb’s 24 Channel 100MHz Logic Analyser from Happy Little Diodes I learned about this Logic Analyzer project. I would like to try building one of these for myself one day too.

This is a reminder for Future John. Check out ZNC for IRC bouncing: https://wiki.znc.in/ZNC

This is on my agenda (but not with priority, I will circle back for this one): Learn KiCad.

Today I’m going to try and fix this mess.

I’m reading some stuff, but I’m exhausted, so off to bed, and hopefully finish this reading tomorrow:

There are some notes from the manufacturer over here: DSLogic Series USB-based Logic Analyzer.

It’s a logic analyzer which can operate at 1GHz that’s within my price range. I’m not rushing off to buy this thing, but it is certainly on my list.

The only other thing I have seen that compares to this logic analyzer is this RIGOL DS70304/DS70504– Digital Oscilloscope 3GHz/5GHz 4 Channel 20GSa/s 2Gpts 1000000 wfms/s which is roughly two orders of magnitude more expensive.