Archive for the 'Electronics' Category

From Hobby to Living

Monday, May 5th, 2014

Here’s a video of my talk to a local geek meeting about how I went from DIY Synths to Full time Synth design.

SPI problems, fixed

Saturday, May 25th, 2013

After a bit of digging and quite a bit of suggestions and advice from people (thanks guys it was all helpful stuff), I found the problem. Basically the chip I use (an Atmel AVR) has a number of interrupts, and they have a ‘priority’, what was happening is that the timer interrupt would sometimes start […]

SPI problems

Monday, May 20th, 2013

I’m having a small problem with receiving SPI. this is the comms between two AVRs, identical settings for the SPI bus with the exception that one is set as a slave and one as a master. I send four bytes, 90% of the time it works perfectly and the timing looks like this, the “LED1″ […]

Zira Update

Wednesday, August 10th, 2011

It’s been an interesting couple of weeks. I built a second Zira to test the remainder of the chips I have and start sending units to beta testers. But the one I built wouldn’t work, it lit up, you could edit values, save patches, load patches but would not respond to MIDI! I checked the […]

GorF Build guide

Thursday, July 21st, 2011

A few people have asked about some elements of how to build their GorF kits, so I’ve revamped the tron build guide to make a little more generic and updated the links. The new build guide can be found here and whilst it’s still about how to build a Tron the important parts (order to […]

Synth DIY UK pictures up

Monday, July 11th, 2011

I’ve uploaded a stack of pictures from Synth DIY UK 2011 to the events page on It was a great event, well attended and we raised over 180 pounds for charity! I would like to thank Neil Johnson for making all the arrangements at Cambridge and in particular Terry Shultz for the donation of […]

Tron Kits available

Sunday, November 21st, 2010

I’m pleased to announce that the kits for Tron are available. The first few kits went to people on the mail-list, so there remains 15 full kits (kit 2) and a few PCB+Micro (kit 1). Kit 1, is a PCB + Programmed Micro for 21.50 GBP. Kit 2, is a Full kit, with PCB, programmed […]

Tron Kit Update

Wednesday, November 10th, 2010

It’s time for an update for the Tron Kits. I now have all the parts, excluding 2. The memory chips haven’t arrived but are due any day, I ordered more direct from Microchip as the original supplier quoted me a delivery date sometime in December. I also only have half of the CPU chips that […]

Zira (PicoWave) Update

Sunday, October 24th, 2010

Well, I’ve had a few problems with this one. A few timing issues which I can fix in software, the biggest problem has been the display. The DLR1414 is incredibly noisy. So noisy you can here a high pitched whine over the sound you’re playing and also it puts so much noise on the ADC […]

Tron Progress

Wednesday, October 13th, 2010

Well, I’ve got the boot loader fully working and debugged. I’ve found one last bug in the main code and have upped the version to version 1.00. I’ll be uploading the Bill of Materials, hex files and so on over the next few days. The kit pricing is coming along, I’m waiting on one final […]