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PostPosted: Thu Jan 04, 2018 8:06 am 
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I've used both. As I recall the 3.3 has less current draw. The Arduino Pro mini also has a low current draw.

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PostPosted: Fri Jan 05, 2018 5:55 am 
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Gartooth wrote:
I've used both. As I recall the 3.3 has less current draw. The Arduino Pro mini also has a low current draw.


Great, just had the 3.3v delivered. I can see why you use it, so small!

Will hopefully get it running this weekend.

Harry


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PostPosted: Sat Jan 06, 2018 1:09 pm 
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Gartooth, have you had any problems trying to code the trinket? Finally got it to be recognised in Arduino IDE software by using an older laptop with usb 2.0 but still getting error codes when uploading. The trouble shooting pages aren't helping much!

Tempted to try the picaxe route, can anyone post some details on this system? A diagram would be great and parts list.


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PostPosted: Sat Jan 06, 2018 1:12 pm 
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ghoot wrote:
PICAXE would be a good option too. I haven't used the Arduino's, but I know there's a ton of stuff that you can do with them, and looks like Gartooth already has you set with those. The PICAXE would use less power though, and all you would need is the PICAXE and a few resistors, and maybe a voltage regulator, but you could probably get by without it. The PICAXE chips come from the UK, so you can probably get one there for around $3 and wouldn't have to pay much for shipping.


Cheers for the ideas Ghoot,
Could you provide a simple diagram/ parts list? I'm new to this, so the simpler the less chance I break something, or set something on fire.
The adafruit is causing issues when trying to code, so a simpler system using a picaxe chip seems a better option, as all I want is to programme it to take three pics per shutter event and recharge flash before sleeping (if possible)

Harry


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PostPosted: Sat Jan 06, 2018 8:19 pm 
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Harry,

What issues are you having with Adafruit? I might be able to help troubleshoot if it will help.

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PostPosted: Sun Jan 07, 2018 3:19 pm 
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Gartooth wrote:
Harry,

What issues are you having with Adafruit? I might be able to help troubleshoot if it will help.


I finally managed to get it working, changed cable and downloaded a set of drivers for the usb.
Programme uploaded succcesffult according to Arduino IDE.

I think I may have wired it wrong though ha!

On your diagram, what is the “n” in which the shutter cable connects to (and the output from Adafruit)?
I used an optocoupler (4n26) I had lying around instead but it’s not working and I think this at be the issue!

Harry


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PostPosted: Sun Jan 07, 2018 11:18 pm 
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The N is an NPN transistor.

You can use an opto in the same spot. Just check the pinout for the opto you have.

I think this tutorial shows what you’re looking for.

http://www.martyncurrey.com/activating- ... r-release/

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PostPosted: Mon Jan 08, 2018 4:40 am 
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Gartooth wrote:
The N is an NPN transistor.

You can use an opto in the same spot. Just check the pinout for the opto you have.

I think this tutorial shows what you’re looking for.

http://www.martyncurrey.com/activating- ... r-release/


Im glad my assumption about using an optocoupler was correct, and i seem to have wired it all correctly.

i think i need to double check the adafruit board is programmed correctly, as it isnt doing anything at the moment.

thanks for your continued help on this!


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PostPosted: Mon Jan 08, 2018 5:12 am 
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Gartooth wrote:
The N is an NPN transistor.

You can use an opto in the same spot. Just check the pinout for the opto you have.

I think this tutorial shows what you’re looking for.

http://www.martyncurrey.com/activating- ... r-release/


Got it working!
i think the sensitivity on the PIR sensor was very low, adjusted them and bingo.

regarding pulse length adjustment on the PIR is this pretty irrelevant now that the Adafruit is controlling the trigger number? or should i set it at the lowest, as once the adafruit gets one signal it will still signal how ever many shots its programmed to?

Harry


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PostPosted: Tue Jan 09, 2018 10:56 am 
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What PIR sensors do people use? the one i have seems to be a bit hit and miss, and is missing triggers (had it set up on a bird feeder).
The one i have is a HC-SR502 from amazon, is there a better one i can buy?


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