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Author's posts
Sep 04 2007
Parallel port interface – Update
I received the missing parts and finished the pcb
Circuit diagram can be found here: Link.
Sep 20 2007
CNC drill/mill machine V2 – Mechanical Part – Update
I made some progress on the Z-axis. First I mounted the spindle on the stepper, then I mounted a junction box on the stepper and made a nut from plastic
I also mounted the inductive sensors:
Detail of the coupling between the spindle and the stepper:
The plate to mount a Dremel or equivalent on:
Oct 13 2007
Kite Light-effects
Someone asked me if I could design a light-effect controller for on his kite.
Example (From another site):
The light program can be made on a pc and then programmed in a eeprom. The eeprom then gets read by a microcontroller that controls the leds.
2 screenshots of the program (written in vb.net):
Eeprom progger:
The circuit:
Oct 21 2007
Symmetric Power Supply 0-70V @ 5A – Update
This update is not from today but from the past year. I have done a couple of small changes and didn’t post them on the site at that time. Now it is time to finely do that.
The first change was that I mounted the transformers in the other direction. This way I’m saving space and I have wound some extra coils at 2 transformers to power the logic.
A picture of how the power supply looks like at the moment
I also decided that I’m going to use rotary encoders instead of touch ic’s. Therefore I ordered some rotary encoders at Sure Electronics. I’m going to use 4 of them in this power supply.
Nov 11 2007
Kite Light-effects – Update
The previous eeprom programmer wouldn’t work. Therefore I made a new version that uses a pic with an USART.
The circuit:
Nov 11 2007
PIC Controlled Robotcar – Update
A few weeks ago I got this programmable robotcar from my neighbour. I decided I’m going to use it for this project.
Some pictures:
The sensors I want to use to detect objects (I have 4 of them)
With thanks to Jens for the optocouplers and Ludo for the robot car!!
Dec 16 2007
TDA2030 Amplifier – Update
There has been a changes off plans, I no longer need a portable amplifier so this project was trown in a corner. When my pc speakers broke I decided to build this amplifier in them.
Dutch 