Firstly, I’d better start by saying I’m a complete newbie to all things Arduino so taking my 1st steps into a larger world!
… add to that, I’ve never really done anything much with electronics either, so I’m trying to learn lots fast.
I’m happy to learn and figure stuff out, but please just bear with me whilst I do as I’ll inevitably ask a few silly/newbie questions along the way.
Right, now that’s out the way …
I’m working on a project for my daughter where I need to make something that has a “snapping” motion (like a dinosaur gnashing)
I’ve tried adapting a few kids toys but they havent been powerful enough for what I need so I’ve decided to have a go at doing it with Arduino.
My thinking (and I could be wrong so feel free to correct me!), is that I’m going to need a minimum of:
a) an Arduino board
b) a battery pack
c) a switch (it needs to be tiny and easy to push as there will be another part of a seperate system pressing this to trigger the snapping, so I’m thinking 1 of these should do the trick: http://www.ebay.co.uk/itm/30-Pcs-Tactile-Touch-Push-Button-Key-Tact-Cooker-Switch-6-X-6-X-4-3mm-4-pin-DIP-/350931988353?pt=LH_DefaultDomain_3&hash=item51b52d2f81)
d) a high speed servo (After a bit of research I’m thinking this should do the trick as I need something capable of moving approx 1kg at 3cm at high speed: http://www.hobbyking.com/hobbyking/store/__13422__HKS_9257_High_Speed_Servo_4_5kg_25g_0_07sec.html?gclid=CLzwiNqR1cQCFWjlwgodQkMAVw)
e) potentially, I’d like to be able to add a soundboard at a later date so we can add a noise to co-incide with the snapping motion. To keep things simple I thought I’d try to focus on ‘a-d’ first, but thought I’d better flag ‘e’ now in case it impacts on the questions below.
Now for the questions!
1)Type of board:
Initially I was looking at a Arduino Uno, but space is limited so I’m wondering if a Micro or Nano would be a better option.
I’m anticipating that all should cope with what I want to achieve, but I’m unsure if there’s anything I may not be aware of as to why 1 would be a better option over the others?
(Also, can Micro & Nano be used as standalone starter boards? My reason for asking is some places seem to imply you need to hook them up to a larger UNO board (or equivalent) in order to transfer the data, but I’ve seen they have a USB on so unsure why this would be necessary if you can simply hook plugin to the board itself. Perhaps the threads/articles I’ve read elsewhere as just out of date now?)
Do I need to use a breadboard, or can I simply connect the switch, batteryholder, and servo directly into the inputs/outputs on the board to save space?
Again, this is my lack of electrical knowledge coming through
I was thinking of using a 9v battery. However, if I understand it right, the Arduino board needs 5v and the servo needs between 4.6v-6v, so would I be better providing each with it’s own power supply?
Also, I’ve seen threads about avoiding using 9v batteries and instead use a bank of AA’s, so given the above, what do you think would be the best solution?