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Micro-Professor MPF-1
Apple-1
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I've built this project back in 1993 when it was used for a variety of experiments.
This project shows you the most basic microprocessor system you can find, built around the Motorola 6802 processor.
It has a total of 128 bytes of RAM and up to 4k of ROM.
About 20 general purpose I/O lines complete the system.
I've also included 2 simple programs, but that doesn't mean the circuit can't be used for many more applications.
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Before I started the SB-6668 project I needed to know how the original program of the PM-6668 worked.
Therefore I needed a way to read the contents of its microcontroller.
This simple circuit, together with the Nano computer reveals the programs from any 8048 and 8049 controllers.
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This is not really a project of mine because it is designed by Atmel and it is used to program their AVR processors.
I only include it here for my own reference and to show you how I've built mine.
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If only I had received 1 Euro for every I²C or IM bus EEPROM that was programmed using this project I could have gone on a nice holiday with the wife by now.
It is rather an old project, and at first it was run on the Apple ][ computer at work.
Later I wrote a program for the IBM PC and it still functions today, even on Windows XP machines!
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Fluke 8010/8012 Interface
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A very old dream of mine came true when I finished this project.
It enables a standard Fluke 8010 or 8012 to be connected to a computer using the SB-Bus.
Now you can collect the measured values on any type of computer.
And as a bonus I've managed to throw in a few extra goodies.
Be sure to read about this project if you own such a meter!
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This is not just a single project.
It is a collection of several more or less complicated projects which are all related to IR remote control applications.
For instance I've explained in detail how various IR remote protocols are decoded using a PIC processors.
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Nikon ML-L1 / ML-L2 IR Remote Control Replacement
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One of the visitors of my web site notified me about the Nikon IR protocol used by the ML-L1 / ML-L3 remote controls for Nikon (D)SLR cameras.
I simply had to build one for myself.
All Nikon cameras which can be controlled by the original ML-L1 / ML-L3 remotes should work with this little project.
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I managed to get hold of some of these display modules.
I'm using them for a variety of experiments.
Soon I'm going to use one in at least one of my projects.
The module is built around an SAA1064 I²C display driver and drives four 7 segment displays.
If you don't have a ready made module like I do you can easily build one yourself.
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Here's another long cherished dream of mine that finally came true.
Philips used to build very nice and accurate frequency counters back in the eighties.
I was very fortunate to be able to buy one from a former colleague of mine.
I gave the counter a new and smarter brain and now it can be connected to the SB-Bus and has some extra ordinary new features.
Some of them can only be found on the more expensive counters.
A must-see project if you own a PM-6667 or PM-6668 counter!
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You may have noticed that I tend to build some intelligence into my projects.
Most of them are controllable through the SB-Bus which enables you to connect up to 125 devices to one serial port on your computer.
The only thing you'll need is a suitable SB-Bus driver.
Here you'll find some examples.
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If you like creating programs for microprocessor you can not do without an easy to use EPROM Simulator like this one, especially if you combine it with my SB-Assembler.
You simply connect it to the SB-Bus and the new program is sent to the Tiny EPROM Simulator every time you assemble your source code.
When the assembler finishes the new program will run instantly, without the need of erasing, programming and re-inserting EPROMs with every trial.
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This simple UTP cable tester can track down cut, shorted and switched wires in UTP cables.
Actually it is rather a universal cable tester because with different connectors you can test the connections of just about any type cable you like.
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