Artwork not working
Topic: Artwork not working
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Artwork not working
Nov 28, 2011, 01:00 am
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
Location: Phoenix, Arizona USA
Where's the beer?
Re: Artwork not working
Nov 28, 2011, 06:11 am
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...
I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread.