which arduino board to buy

e14 Contributor over 12 years ago

need to build a timer control board for a coffee machine

it needs to be able to activate 3 240v solenoid valves with 4 programmable time periods before shut off

and also turn on a 240volt motorpump

Any suggestions would be helpful

Thanks

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mcb1 over 12 years ago in reply to e14 Contributor +1

You might wanna check if the Arduino you pre-choose can do that stuff Can you enlighten me as to what the above means?. The Arduino is more than capable of providing 4 independant timed outputs to a suitable…

0 mcb1 over 12 years ago

Any of the Arduino will be suitable.
Size may be your limiting factor, and somewhere to put the 4 relays needed to do the 230v switching.

I suggest looking at the Arduino IDE example titled 'BlinkwithoutDelay' which uses the 'millis()' time to do the timing rather than 'delay'.

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0 e14 Contributor over 12 years ago in reply to mcb1

Ok thanks

So a mega or an uno will suffice then
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0 mcb1 over 12 years ago in reply to e14 Contributor

Even a nano or some of the other 'chip only' type boards will work.

You could also use a Digispark

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0 e14 Contributor over 12 years ago

Hmm... Size depends. You might wanna check if the Arduino you pre-choose can do that stuff. Maybe another type board might work.
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0 mcb1 over 12 years ago in reply to e14 Contributor

You might wanna check if the Arduino you pre-choose can do that stuff
Can you enlighten me as to what the above means?.

The Arduino is more than capable of providing 4 independant timed outputs to a suitable relay.

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0 gadget.iom over 12 years ago

It might also be worth looking into the ATTiny85 or similar. They can be programmed using an Arduino board through the Arduino IDE. Ideal for a simple project requiring a small footprint.

PS...
2nd the suggestion from mcb1 regarding the use of millis() from the BlinkWithoutDelay example.
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0 mcb1 over 12 years ago in reply to gadget.iom

It might also be worth looking into the ATTiny85 or similar. They can be programmed using an Arduino board through the Arduino IDE. Ideal for a simple project requiring a small footprint.

Thats what the Digispark is http://digistump.com/category/1

cheers
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0 gadget.iom over 12 years ago in reply to mcb1

Thats a nice looking bit of kit!
Surprised I haven't noticed it before. Thanks for the link.
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