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Author Archives: davidcrocker
Repairing a Ridgeflow Conservatory Vent Fan
The Ridgeflow conservatory vent fan is no longer manufactured. Here I describe my experience of repairing one. Continue reading
Piper Autocontrol III Wing Leveller Fault Finding
Recently I had the chance to investigate a Piper Autocontrol III (which is a rebadged Century II) 2-axis autopilot. The unit was installed in a Piper Cherokee and had been placarded “Autopilot inop”. The owner reported that avionics shops considered … Continue reading
Posted in Electronics, Light aircraft avionics
Tagged autocontrol III, avionics, Century II
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Home Energy Management System Part 4: Characterising the Hypervolt Current Transformer
The Hypervolt EV Charge Point is a UK-manufactured 7kW single phase unit. It is one of the smartest looking EV chargers on the market. It has no controls on the unit and can only be controlled via a smartphone or similar via the cloud server. Continue reading
Home Energy Management System Part 3: Planning the hardware
In order to meet my objectives without running wires from one part of my house to another, I will need at least the following WiFi-connected units for control and monitoring. Continue reading
Home Energy Management System Part 2: Hacking the iBoost+ protocol
To monitor and control the iBoost+, one option would be to fake the sender current transformer input, and add a current transformer to measure the power being fed to the immersion heater. But if we can decode the RF protocols, it would be simpler to fake the sender RF transmission, and read the messages sent by the main unit to the Buddy. Continue reading
Home Energy Management System Part 1: Objectives
This series will record my adventures in building a home Energy Management System, to monitor and control solar PV generation, battery storage, EV charging, hot water heating, and grid import/export. Continue reading
Adding filament monitors to the Hemera tools
The imminent 3.2beta release of RepRapFirmware includes support for filament monitors connected to Duet 3 expansion and tool boards. This post describes how I added filament monitors to the two Hemera tools on my E3D Tool Changer.
Improvements to the Hemera Tools
Since building my first Hemera tool controlled by a Duet3D Tool Board, I have built a second one and made some improvements.
Large Kossel update
My large Kossel variant has been running for several years now. It is reliable and produces good prints. I have however replaced the extruder drive and the power supply by different models, and added a filament monitor. I will now … Continue reading
Converting the E3D Tool Changer to Duet 3 with Hemera Tools (Part 2)
Configuring the Duet 3 The Duet 3 configuration and other system files I use are based on the ones that I published for Duet WiFi/Ethernet running RepRapFirmware 3. They are configured so that X0 Y0 is the centre of the … Continue reading
David Crocker's Solutions blog 