Blog Archives

Exporting from Proteus ARES to OSH Park

I have recently started to use Proteus ARES for PCB layout. I regularly order boards from OSH Park but there is a fixed file naming convention for uploaded ZIP files. Exporting from ARES is easy, the image below shows the

Posted in Uncategorized Tagged with: , , ,

Video 1 - Hand SMD assembly and frying pan reflow

People often ask how I assemble SMD boards, the video below is sped up to 20x and demonstrates the process. It takes a few minutes to dab some solder paste on each pad, then parts are placed using anti-magnetic tweezers.

Posted in Electronics Tagged with: , , ,

Right angle corners for PCB traces

There is a lot of myth and misconception about whether right angle (90°), chamfered (45°) or curved PCB traces are "better".  One of the often quoted "facts" is that right angles are bad for signal propagation or radiated RF emissions. I

Posted in Electronics Tagged with: ,


I have previously raved about BatchPCB, a low cost prototyping service run by SparkFun out of the USA. However, it seems that you now can't select shipping to the UK (and perhaps other parts of Europe) and they don't seem

Posted in Main menu bar Tagged with: ,

Updated Eagle library posted

I have just uploaded the latest version of my Eagle library, containing a bunch of new parts.  These include: Maxim DS1337 RTC RFM12 radio module (with pins) Keystone CR123A battery holder Memsic MXC6202 I2C accelerometer ON Semi CAT6219 500mA LDO

Posted in Electronics Tagged with: ,

PCB antenna design

One of the circuit boards I'm developing would benefit from an onboard antenna, so I started hunting for design tips.  The following three PDF documents do a great job of explaining the basics: Freescale "Compact Integrated Antennas" Kent Smith "Antennas

Posted in Main menu bar Tagged with: , ,

PCB0002 - LED matrix

It has been ages since I have updated this site. I have started to document some of the PCBs I have created The first is an 8x8 LED matrix, with code for some whizzy effects. More information and downloads on

Posted in Main menu bar Tagged with: ,

Cooking with gas, my first SMD board

My first bunch of boards arrived back from BatchPCB and I'm really impressed.  Great printing for the silkscreen and a really professional looking product.  One of the boards I ordered was a breakout board for the SMD PIC 18F2321, the

Posted in Main menu bar Tagged with: ,

Eagle components library added

A very short note to say that I have (finally) published my Eagle components library on this site. Right now it doesn't contain many parts, but I will add to it as I make more boards.

Posted in Main menu bar Tagged with: ,

DIY pcb making - my first board

After getting back into electronics recently, I decided to have a go at making a PCB.  A friend pointed me to Pulsar Pro FX, a special toner release paper. I learned a few things along the way

Posted in Main menu bar Tagged with: ,