I have written an electronics www site - 4qdtec.com. I have designed electronic products and industrial control systems. I have specified software, including user interfaces and I have dabbled in programming in several languages. My www site, which I still add to, contains much writing on many subjects. Including a mini-autobiography/CV. From 1991 I ran my own electronics businsess - 4QD with my wife, which we sold in late 2015.
Use the Contact button above if you are interested: a chat wil cost you nothing and may be useful to you.
Most of the manuals I wrote (and illustrated) for 4QD are reproduced here, A good one to show the level of skill I can offer is Pro-150 instructions, see below. the most are in two formats:
You will need Adobe's Acrobat to read them. If this is not already installed on your computer, it is freely available via the www.
Those for printing are designed to end up as an A5 booklet (approx 4" by 6") by printing double sided on A4 and folding on the centre line.
| Controller | Description | For printing | To read on screen |
|---|---|---|---|
| PRO-150 | Pro(grammable) 150 Mk 2 | PDF for printing | PDF on screen |
| 4QD-200 | 4QD-200-48 current version | PDF for printing | |
| 4QD-300 | 4QD 300 (09 base, 17 top) | PDF for printing | |
| BCM | Battery condition meters | PDF for printing | PDF on screen |
| DNO | DNO-5 and DNO-10 | PDF for printing | PDF on screen |
| PTR | Porter 40 issue 3 | PDF for printing | |
| PTR-5 and PTR-10 | Porter 5 and 10 | PDF for printing | PDF on screen |
| PRO-120 | Pro series - Mark 2 | PDF for printing | PDF on screen |
| Uni | Uni series | PDF for printing |
| DCI-111 instruction | PDF for printing | |
| Joystick Interface (Single axis, standard) | PDF for printing | |
| Joystick Interface (Single axis, daughter) | PDF for printing | |
| DMR-203 Radio Control Interface | PDF for printing | PDF on screen |
| BCM | Battery condition meters | PDF for printing | |
| BNL & BNR | Bell throttle, assembly and pot | PDF for printing | |
| GTH | Magura twist-grip throttle | PDF for printing | |
| PLP | Plunger Pot | PDF for printing | |
| HRB and RBT | Hand control and Relay board for locos | PDF for printing | PDF on screen |
| 1QD series controllers | PDF for printing | |
| 2QD series controllers | PDF for printing | |
| 4QD 150 and 200 controllers, issue 11 | PDF for printing | |
| 4QD 150 and 200 controllers (13/14 base, 15/16 top) | PDF for printing | |
| 4QD 150 and 200 controllers (base 13, top 13) | PDF for printing | |
| 4QD 150 and 200 controllers (base 13, top 14) | PDF for printing | |
| 4QD 150 and 200 controllers (13/14 base, 17 top) | PDF for printing | |
| 4QD 150 and 200 controllers (17 base, 17 top) | PDF for printing | |
| 4QD 300 controller early (08 control board) | PDF for printing | |
| 4QD 300 controller (04 base, 15 top) | PDF for printing | |
| 4QD 300 controller (05 base, 15 top) | PDF for printing | |
| 4QD 300 controller (05 base, 17 top) | PDF for printing | |
| Eagle controllers | PDF for printing | |
| Egret controller | PDF for printing | |
| Eagle - standard version | PDF for printing | |
| Eagle - Jack version | PDF for printing | |
| NCC series: Mark 1 | PDF for printing | |
| NCC series: Mark 2 | PDF for printing | |
| Mk 1 Pro 120 (issue 8 and later) | PDF for printing | |
| Mk 1 Pro 120 (issue 5) | PDF for printing | |
| Porter Issue 2 | PDF for printing | |
| DMR-202 Radio Control Interface | PDF for printing | |
| Scoota series | PDF for printing | |
| VTX 40 and VTX 75 | PDF for printing | PDF on screen |
| DMR-201 Radio Control Interface | PDF for printing | |
| DCI-111 instruction, issue 4 | PDF for printing | |
| SMR-102 Radio Control Interface | PDF for printing |