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Author's posts
Jan 01 2002
UV-Exposure box V1
This project was my first UV-Exposure box. But it didn’t work as it should. Therefore I made a new version that works better.
Schematic:
Pictures:
The glass plate with the lamps beneath it.
The timer (Black box with the grey knob on the outside).
Working
Feb 04 2003
Parallel port interface
This is a project I made in 2003. It is a box with 8 leds in it that can be controlled by the parallel port of a pc.
Pictures:
Nov 20 2004
CNC drill/mill machine V1
This is the first version of my cnc.
The parts are recycled from old printers.
A few of the steppers from the printers:
Temperature sensor:
I wanted to know how hot it gets inside the stepper driver case. Therefore I build a 4digit 7-segment temperature meter. (From Conrad, order nr 192147 – 8B)
The stepper driver:
Power supply:
I used an old 150W AT pc power supply. The light bulb is to provide a minimum load (the power supply doesn’t start otherwise)
Case
The plan:
Pictures:
As you can see I had it partially build, but I had to take it back apart because the base plate was crooked. Therefore I started a second version.
Jan 10 2005
Safety transformer V1
I received 2 140VA transformers and decided I’m going to build a safety transformer with them.
Circuit:
Oct 01 2005
Lathe speed controller
I have an old lathe that only turned at 1 speed. I wanted a adjustable speed so I connected it to a frequency controller.
A couple of pictures:
The frequency controller:
The lathe:
The control box with “emergency stop”, right/off/left switch and a potmeter to control the speed.
Jan 01 2006
Etching Tank Heating
When the weather is too cold I can’t etch because the etching fluid freezes. So I made a heated etching tank, the heating element is recycled from an old washing machine. It consisted of 2 heating elements, a large 2Kw and a smaller 1Kw, I cut the 2Kw off so it would fit in my tank (and 3Kw would be too much). 1Kw is still a lot off power so I put a dimmer on it. To regulate the temperature I made a temperature controller with a pic16f676. The temperature sensor is a LM35 with heat shrink around it. The display is a 2x7segment display (Datasheet).
The hex file for the pic can be found here: Link.
The circuit:
The pcb (PDF):
Mar 01 2006
CNC drill/mill machine V2 – Mechanical Part
Because the first attempt failed I started a second version. Here is a drawing of how I want to make it:
Mar 31 2006
CNC drill/mill machine V2 – Mechanical Part – Update
I’ve gotten 2 pieces of guide rail from my internship company. Unfortunately I didn’t got the bearings, but I can make them myself.
Thanks to Jan, Roger and internship company.
Dutch 
