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MIDIGEN – A (belated) LEMS postscript

This short article discusses an add-on to the following:

The Brute: A 3-channel Audio Amplifier For Leslie Speaker Emulation.
Treslie: 3-Phase Leslie Speaker System.
LEM: Leslie Emulation Control System using PIC Microcontroller (18F26K20) based on Pequeno board, (Arduino-alike) and 3 DACs.

Shortly after completing LEMS, The Brute and Treslie, (see links above) it became apparent to me, that [...]

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Patch Tuesday – Microsoft’s Latest Bag Of Shite

I’ve just spent most of the morning recovering one of my machines that I had foolishly allowed Microsoft to automatically update.

It’s an XP machine, and after the ‘upgrade’ yesterday was almost unusable this morning, with huge delays in accessing Explorer, and much, much worse, hanging when any attempt was made to shut down.

This successfully prevented [...]

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PCB Milling Diary – April 12th 2012

Updated @ 16:28 13th April 2012
(see supplemental)

I’m playing catch-up here. The contents of this post refer to work over two days old, delay in writing it up is due to other, more pressing matters.
The good news is that after using LineGrinder to generate the G-Code from my little PCB, the two mysteriously-missing areas on the [...]

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PCB Milling Diary – April 8th 2012

A great deal of what we see on the Web, project-wise, is the ‘finished’ product. Every questionable decision has been ‘revisioned’, and what warts remain are carefully hidden, or presented as ‘features’. Yeah, I know this is a pretty cynical view, but unfortunately, nearer the truth, than even I would like to admit.
One of the [...]

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Converting a Proxxon MF70 Milling Machine To CNC – 4

A Simple Thumb Drive G-Code Delivery System

Updated with File System Source-Code & example of logging 15th April 2012

This post in one in a series. Other posts you may be interested in are as follows:

Converting a Proxxon MF70 Milling Machine To CNC – 1: Introduction.
Converting a Proxxon MF70 Milling Machine To CNC – 2: The User [...]

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Converting a Proxxon MF70 Milling Machine To CNC – 3

Controlling the MF70 Spindle Speed

Updated 28th April 2012 with Eagle Schematic and Printed Circuit Board Design.

This post in one in a series. Other posts you may be interested in are as follows:

Converting a Proxxon MF70 Milling Machine To CNC – 1: Introduction.
Converting a Proxxon MF70 Milling Machine To CNC – 2: The User Interface.
Converting a [...]

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Converting a Proxxon MF70 Milling Machine To CNC – 2

The User Interface

This post in one in a series. Other posts you may be interested in are as follows:

Converting a Proxxon MF70 Milling Machine To CNC – 1: Introduction.
Converting a Proxxon MF70 Milling Machine To CNC – 3: Controlling the MF70 Spindle Speed.
Converting a Proxxon MF70 Milling Machine To CNC – 4: A Simple Thumb [...]

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Converting a Proxxon MF70 Milling Machine To CNC – 1

Overview

This post in one in a series. Other posts you may be interested in are as follows:

Converting a Proxxon MF70 Milling Machine To CNC – 2: The User Interface.
Converting a Proxxon MF70 Milling Machine To CNC – 3: Controlling the MF70 Spindle Speed.
Converting a Proxxon MF70 Milling Machine To CNC – 4: A Simple Thumb [...]

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Microchip’s MRF24J40MA SDO Buffer Hell

I am annoyed. So much so, that I’ve downed tools to scribble this.

I recently spent some considerable time attempting to get a non-documented SGN6210 radio module to work. In the end I decided there were too many unknowns, and it was better to go for a more ‘mainline’ product, so I bought two MRF24J40MA modules [...]

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Pimping an Op-Amp for wide voltage swings

A wide-voltage swing op-amp for less than £1.00?

As promised in an earlier post, I describe here my experience in turning a common-or-garden TL081 PDIP op-amp into a wide-voltage swinging monster, with a minimal sprinkling of SMD and a small circuit board made from scraps.

Prototype 72 volt op-amp

I wanted to augment my current heavy-duty power-supply [...]

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