James Stanley

Posts tagged 'electronics'

Tagged: all | 3dprinting | bitcoin | electronics | smsprivacy | puzzle | chess | pikon | tor | cryptography | ipfs | lawnmower | science | steganography | rc2014 | ricochet

Design and Implementation of a Z80 Computer Front Panel »

Tue 12 November 2019

I designed and built a front panel for my RC2014. It allows you to view and alter the contents of memory, read and write to IO devices, and single-step through instructions. The RC2014 backplane basically just puts the Z80 CPU pins directly on the bus, so the same panel would work unmodified against almost any Z80-based computer, as long as you broke out the bus onto the 60-pin ribbon cable. Read more »

The RC2014 Z80 Microcomputer »

Mon 21 October 2019

I recently came across the RC2014. It is a simple computer sold in kit form, and using a Zilog Z80 CPU. Read more »

My Arduino-based industrial process controller »

Sun 1 September 2019

For my 3d metal printing project, I need the sintering furnace to stick to a pre-defined temperature profile. Unfortunately, the controller that my furnace came with only allows you to set a constant temperature. It maintains a constant temperature very well, but the operator frequently has to manually update the temperature in order to stick to the defined profile. Read more »

How to make a rev limiter with an Arduino »

Mon 22 July 2019

My racing mower has a tendency to over-rev on long straights. To avoid damaging the engine, we have been lifting off the throttle, but a more reliable solution would be an electronic rev limiter. I did buy a commercial rev limiter made by AccuSpark, but was unable to fit it to my mower because the AccuSpark unit needs access to both sides of the ignition coil, and my ignition coil is inaccessible, inside a black box with all the other ignition electronics. So my solution was to make a rev limiter with an Arduino. Read more »

My PiKon telescope hardware »

Mon 3 December 2018

Since the last post I've been working on the hardware of my telescope. I think the hardware is basically done, I just have a bit more software to write, and then need to wait for a convenient and cloud-free night in which to try it out. Read more »

What's inside an HSBC SecureKey? »

Thu 12 July 2018

You've probably seen an HSBC SecureKey. It's a 2-factor authentication device for online banking. I was given one because the previous owner had started using the bank's smartphone app and no longer needed the SecureKey. It looks like this: Read more »

My homemade ebike control panel »

Fri 1 June 2018

I wrote before about dismantling the control panel from my ebike to find out how it works, and had some ideas for an improved design. Read more »

Reverse engineering an ebike 3-mode PAS LED panel »

Fri 11 May 2018

I bought an electric bicycle recently. It is an incredible machine, and I think everyone should get one. The thing I never liked about cycling is how tired you get going up hills, and the electric bicycle solves this problem without taking away any of the fun parts of cycling. A truly incredible machine. Read more »

How to control a digital speedometer »

Tue 12 December 2017

As part of my YX140 scooter project (now finished) I discovered that the scooter's speedometer is controlled digitally. There was a sensor in the original engine which generated pulses to signal the speed of rotation of the gearbox output shaft. The new engine has no such sensor, so I had to do a little electronics to make the speedo work. Read more »

Secrets of the Medtronic MyCareLink Patient Monitor »

Sun 4 December 2016

I have acquired a "Medtronic MyCareLink Patient Monitor 24950" and have been playing with it a little this weekend. It looks like this: Read more »


James Stanley - james@incoherency.co.uk | ricochet:it2j3z6t6ksumpzd | jesblogfnk2boep4.onion | @jes@mastodon.jes.xxx | [rss]