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Author Topic: Artwork not working  (Read 1572 times)
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I built an artwork last summer using latching relays and mechanical trip wire switches but it was no very reliable so I have completely redesigned it around an arduino..but having spent hours and ££ I now cannot get it to work and it feels very disheartening.

Basically the scheme is as follows

pir sensor detects movement->
a short voice message is played through speaker 'b' and two leds flash inviting passers by to put a coin through a slot ->

if a coin goes through the slot it triggers a switch ->
a motor is turns on and rotates a wheel anticlockwise ->
another short message plays saying thank you through speaker 'a' ->
a lug on the rotating wheels knocks a switch ->
after 4 second delay the motor stops ->
end of sequence


so I can get the arduino to switch on and off the led lights

I have uploaded the code for the PIR, the output from the PIR seems permantnently on HIGH, unit isn't working!

The SN754410 H bridge is wired up including a separate 12v supply for the motor..but whenever that is plugged in the chip gets extremely hot very quickly.  I tried uploading the code to make the motor turn, activated by the coin through the slot: it doesn't.  Don't know why.  Is the chip now fried because it got hot, or is that normal.  If it should not then what have I done wrong.

I simply cannot get my Arduino on my laptop to accept a sketch to try out the Wave shield..all I get is pages of error messages. 

Right now, I feel like sticking the whole lot in the toaster.  I have searched the forums and tried different things to resolve the various problems and got nowhere.

any advice welcome
Carrie
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Phoenix, Arizona USA
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Schematics and code, please. Also specs on the motor (voltage rating, stall/running current); the SN754410 only has the capability of 1 amp output, and that only with a heatsink (but it should go into thermal shutdown first, if you don't have a heatsink on it).

But before anyone can really help you, we need code, schematics, and specs...
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