Greg

Most commented posts

  1. MyFitnessPal weight importer — 23 comments
  2. Commodore VIC-20 35K Expansion — 13 comments
  3. Repairing the ZX Spectrum Coil — 6 comments
  4. Netware 3.12 on the Raspberry Pi — 4 comments
  5. Building TZXDuino — 4 comments

Author's posts

Building TZXDuino

To load programs on the AZ Spectrum you need a cassette player…or so I thought.   Came across TZXDuino which lets you play files from the SD card using an Arduino and a amplifier.   Rigged this up in a morning and it works beautifully. I updated the code to use a LCD 16×2 without I2C. …

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Programming the 28C256

Not having a programmer for this chip I decided to  use my Arduino. After trying out various projects on the internet I eventually came across TommyPROM which uses 74LS164 serial to parallel shift registers. Wired up to my Arduino Uno, fired up TerraTerm  and uploaded the diagnostic ROM to the 28C256. The 28C256 is a reflashable  …

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Spectrum RGB DIN to SCART Pinouts

After looking on the internet there seems to be a lot of confusing information on the pinouts for building a DIN to SCART cable. I’ve looked through the harlequin schematic and SCART pinouts and it should be as follows: Spectrum Harlequin RGB DIN to SCART DIN  ———–> SCART PIN – SCART Function Pin 1 ———–> …

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ZX Spectrum Harlequin

After spending a good few hours reading up on retro computers and wanting to relive my childhood I’ve decided to give the ZX Spectrum Harlequin a go. Yes, I know its probably cheaper to buy a complete assembled board or even a ZX Spectrum from eBay, but where is the fun in that! There are many …

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3.5″ TFT Touchscreen for Raspberry Pi

I recently purchased one of these cheap 3.5″ TFT displays for the Raspberry Pi from eBay for £10 and spent many hours trawling the web trying to get it working.       This is a summary of all the steps I needed to follow from various sources. Running the latest Debian Stretch Lite First …

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Temperature sensors using WeMos

Domoticz

After trying for a few months to get mysensors working on a Arduino mini pro with a NRF24L01+ I eventually gave up as the radio was too unstable. Works fine one day and next it loses communication. I tried all the tips and tricks to get these devices stable but had no luck. I now …

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ESP8266 + DS18B20 LUA code completed

This LUA code on the ESP works like a bomb – really simple and really stable. The temperature sensors are connected directly to the ESP’s GPIO0 pin. This eliminates the need for an Arduino as all the work is done by the ESP. https://github.com/StormTrooper/ESP8266-Temperature-Sensor

ESP8266 LUA

After having struggled for many days with the instability of the ESP (I almost got some code going which read the DS18B20 sensors and upload the reads via the wifi, but the ESP kept resetting or returning unpredictable results) I did some more reading up and found these clever guys are now using the microcontroller …

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ESP8266 Wifi Module

Came across this module while looking at how to connect the Arduino to the net. There are the quick and easy and expensive ways to do it, and then there is a ESP8266. This goes for around £3 on eBay so thought I’d get some of these and see if I can get it working …

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Raspberry Pi script to get cpu/memory/uptime/memory

From a few goole sources I put this script together to grab the cpu temperature, utilization, free memory and uptime from my raspberry pi weather station and write the results to my MySQL database. I will use this data at some stage in my Weather Station project. #!/bin/bash # # Script to get Raspberry Pi …

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