The KITT scanner

We all know KITT, don't we?

For all the nerds: KITT was the car of Michael Knight. And Michael Knight was David Hasselhof before he played a part in 'Baywatch'.

Anyway, KITT was the Knight Industries Twothousand T-something. It was the car that could turboboost itself over its opponents. It drove up to its master when he called it with his wristwatch.
The most appealing aspect of KITT was the scanner in its nose. It went left, right, left. Never ending. It was the trade mark of KITT and of Night Rider.

Roll your own KITT scanner with some cheap chips (no programming involved)

For all those guys (girls too?) that would love to own a KITT scanner but are too stubborn, stupid or lazy to program a microcontroller I have a nice circuit. Just download the KITTSCAN.ZIP file and unzip the files. In the ZIP file are:

KITSCAN.LPR Laserjet ready circuit drawing
KITSCAN.MPR Same for matrixprinter
KITSCAN.SCH Circuitdrawing in PADS LOGIC file format
KITSCAN.LST Bill of materials
KITSCAN.ASC Netlist output file for PADS PCB.

The LPR and MPR files are for easy printing. Just copy it to the appropriate printer and you have a schematic drawing:

Copy KittScan.mpr PRN

if you have a dot matrix printer. Or, if you have a laserprinter:

Copy KittScan.LPR PRN

Help! My schematics don't print!

If you are playing from within Windows (anything later than 3.11) you will run into problems when printing many of my ready-made files. This is done because Willy Gates wanted to discourage the use of other operating systems. If this happens to you, just reset the computer, and while rebooting press F8 to enter "Command prompt only" mode. From that moment on, there is no Windows to "help" you anymore and the diagrams will not be corrected anymore.

If you belong to the real men who have installed PADS on your system, then the KITSCAN.SCH file is ideal. Just load it onto your software and process it as you always do.

About the schematic.

One warning: I should have drawn 32 LED's but I only showed it for 2 LED's. Both 74LS154 chips have 16 LED's each on their outputs. They're all connected like the two I drew in. So you should be able to get the picture.

The circuit is a little nifty. Try to work out how it functions and what it does. Then build the circuitry (point to point wiring will do perfectly well!) and see if your predictions match its operation.
If you want to change the scan rate, just change the resistor between +5V and pin 7 of the 555 into a potmeter and you're done.

Page created in 1996 for Jasper,