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Random musings and maybe some useful information

Faulty Chinese PowerBank PCBs

Majenko Technologies, Matt Jenkins

Faulty Chinese PowerBank PCBs

I have just taken delivery of a batch of USB C 2A powerbank charger + boost circuits from a seller on AliExpress. China churns out millions of these circuits every year, so you'd think they'd be good ...

Sep 22, 2021

OS X: Why X?

Majenko Technologies, Matt Jenkins

OS X: Why X?

*Ok, let me start out by saying this is going to be a page filled with supposition, guess work and, above all, plenty of cynicism. Don't believe anything you read here, it is only the biased and cynic...

Jul 5, 2021

New Website

Majenko Technologies, Matt Jenkins

New Website

So... This is our new website. Whaddayathink? Isn't it spangly and posh? There's quite a few things from the old website that aren't here now, but to be honest who really needed them? If you had an ac...

Jun 28, 2021

Reprogramming a new uPR v4 board (with sound) using PICkit2 in Windows

Majenko Technologies, Matt Jenkins

Reprogramming a new uPR v4 board (with sound) using PICkit2 in Windows

Reprogramming one of the newer redesigned Pulse Rifle boards (with sound version only, mind) with a new firmware is pretty simple in Windows. Step one is to install the right software. You need to fi...

Jun 28, 2021

Going Virtual

Majenko Technologies, Matt Jenkins

Going Virtual

I recently decided to rebuild my entire computer system and go to a fully virtualized arrangement, including GPU passthrough, etc.. And what a fight it was. After a lot of googling and finding out dif...

May 30, 2021

It lives! The new pulse rifle design is alive!

Majenko Technologies, Matt Jenkins

It lives! The new pulse rifle design is alive!

We have success! The new design works, and works /perfectly/. Now it's all hands to the pump fulfilling the back-orders....

May 14, 2021

Pulse Rifle: One step closer

Majenko Technologies, Matt Jenkins

Pulse Rifle: One step closer

Great news: the new test boards for my even smaller pulse rifle boards have now arrived. I'm just waiting on a couple of components to arrive (should be here in the next day or so), and then I can bui...

May 10, 2021

New pulse rifle design update 1

Majenko Technologies, Matt Jenkins

New pulse rifle design update 1

So the new boards have been made, and are on their way over from China. They should be with me within about a week, at which point it'll be a case of building one, then creating new firmware for it, t...

Apr 29, 2021

Pesky supply chains

Majenko Technologies, Matt Jenkins

Pesky supply chains

So one of the main chips that I use all the time on many of my products has suddenly vanished off the shelves. Last week I bought some and there were plenty around. This week I go to buy some and /bam...

Apr 21, 2021

Hacking the Tenma 72-14110 Function/Arbitrary Waveform Generator USB Protocol

Majenko Technologies, Matt Jenkins

Hacking the Tenma 72-14110 Function/Arbitrary Waveform Generator USB Protocol

I recently added a Tenma 72-14110 signal generator to my array of lab equipment. This handy waveform generator has quite a nice array of functions, such as the normal waveform generators, up to 5MHz, ...

Feb 6, 2021

How I cross-compile a fat binary cross-compiler for OS X Big Sur

Majenko Technologies, Matt Jenkins

How I cross-compile a fat binary cross-compiler for OS X Big Sur

I have been tasked with creating a new compiler for chipKIT. One of the big things this compiler must do is work on new versions of OS X. That means Big Sur. And that means supporting both /x86_64/ an...

Jan 8, 2021

Power LED Driver Board

Majenko Technologies, Matt Jenkins

Power LED Driver Board

To add to the new Pulse Rifle ecosystem I have designed (and ordered from China) a tiny Power LED driver board. This will take the firing pulse output from the pulse rifle or smart gun boards (EX conn...

Jun 9, 2020

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