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043

KITT Scanner

R1

330 Ω

+5V

D1

D2

8

D3

IC1

1

2

3

7

RESET

PB2

D4

6

5

PB3

PB4

PB1

PB0

ATiny22

D5

4

D6

R2

330 Ω

014038 - 11

COMPONENTS LIST

R1

R2

014038-1

IC1

Resistors:

R1,R2 = 330 Ω

D3

D2

D1

D6

D5

D4

Semiconductors:

D1-D5 = LED,

high-efficiency

IC1 = Atiny22 (Atmel)

(C) ELEKTOR

014038

R. van Arum

Among all the designs for running and flashing light dis-

plays we have published over the years — and that’s a

respectable number — there is one that can be said to have

generated truly phenomenal interest: the ‘KITT scanner’.

Although it appeared quite a while back (16 years ago

already!), we still receive requests for it. Was it such a won-

derful design? Not at all; it was just a simple light pattern

that continuously ran from left to right and back again – but

as luck would have it, the hero of a TV series that was very

popular at the time drove around in a car with exactly the

same type of display mounted in the grille. Naturally, all of

his enthusiastic fans wanted to have exactly the same thing.

Since, as we have mentioned, the interest in this display has

not completely died out, we think that the mini version

described here will be appreciated by many of our

(younger) readers. It is based on a small Atmel microcon-

troller (the Atiny22), and if you use the printed circuit board

layout shown here, you can work it into an extremely origi-

nal brooch or earring for the disco. As can be seen from the

schematic diagram, the circuit contains only two resistors

and six high-efficiency LEDs in addition to the controller.

Although the control program is very simple, it is still too

big to be printed here. However, if you are interested you

can download it (free of charge) from our website at

www.elektor-electronics. co.uk . Look for file number

014038-11 , Free Downloads section.

(014038-1)

12/2001

Elektor Electronics

81

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