Lord of the Relays

Six-relay team performing for you "Lord of the Dance" style.

These are six large, loud 12V relays driven by ULN2003 darlingtons and programmed using a Basic Stamp 2. The relays are plugged into sockets screwed into wood planks. Under each relay is a 12V dashboard illumination bulb switched by the relay contacts.

The program is amazingly simple: Repeatedly count from 0 to 63, XOR a random number with most of the bits, and switch the relays using the 6 LSB bits. The timing between each beat is varied randomly to make it sound more human. (Full program at bottom.)

Other Tid-Bits:
- When everything's on, it draws 1.8A. Just the relays alone draw 600mA.
- Now and then one of the Darlington channels of the ULN 2003 burns out and has to be replaced.

Basic Stamp 2 Program ---------------------

' {$STAMP BS2}
' {$PBASIC 2.5}

DIRS = %1111111111111111
OUTS = %0000000000000000

speed VAR Byte
r VAR Word
i VAR Byte

speed = 119

main:

FOR i = 0 TO 63
RANDOM r
OUTL = i ^ (r.LOWBYTE & %11111101)
PAUSE speed + (r.HIGHBYTE & %00000110)
NEXT

GOTO main

Category:

Science & Technology

Tags:

• lordofthedance
• relays
• basicstamp2
• basicstamp
• parallax
• clanking
• tapdance
• metallic

[jhogsett]

I think I just connected a clip lead however I do own one :-)

[DeanMrack]

heh, not bad :)

[2253benjamin]

spoon man!

[macrilege]

Wow I was hoping for the intro of Van Halen "Hot for Teacher" to start. :)

[Ger3lyn]

Its cool... :)

[ercost60]

Fantastic rhythm, sounds like tap dancing!

[stephmc111]

cool

[anothatech]

sounds like tap dancing

[TroniPhile]

@jhogsett Ah. Nice video by the way. Looks like a lot of hard work. Keep it up!

[cabrahamrv]

man thats very impresive...I biuld thise kind of devices myself.. and I've got to a point where i wanna make something big and need somebody smart to team up and do it together. please contact me if interested..

[madshusted]

You have the circuits please?

[MrStemkilla]

haha pretty cool

[thewii552]

@TroniPhile I think so