Sparkle Output issues?

[Dave]

Hi, I’ve just got a crumble with a couple of sparkles. The battery pack is linked to the crumble correctly, sparkles to the crumble + – and the output lead to D. Just like the picture on page 1 of getting started (for the sparkles)

I can get the sparkles to operate correctly, but only with the green lead from D on the crumble. Not A, B, or C

A,B,C,D all work as inputs (for example wait until A is high) to do the sparkle routine. But the sparkles only work with D as output.

The motor outputs are both working correctly.

why can’t I get the sparkles going from A B or C? ‘Set sparkle’ only works with D

On my Crumble Robotic Vehicle, A B C work the sparkles

Attachments:

1. pulse-motors-and-sparkles.crm

[Simon]

The sparkles are only designed to work on the D output.

I’ve no idea how on earth they could be working from A B or C on the Crumble Robotic Vehicle!

Simon

[Dave]

Lol!
Sorry Simon, must have been tired and mistaken about ABC.

Is there a detailed documentation sheet we can get please?
Like how much power do the motor outputs provide? Also ABCD as outputs?

Thanks for clearing that up about sparkles.

[Joseph]

I think I’ve just replied to your contact form submission, so sorry if I’m repeating myself!

I have updated the getting started guide with a little more information on analogue inputs. I also hope to put together a datasheet containing the technical information soon.

The DRV8835 (motor driver IC) can handle up to 1.5A per output. It also has over-current protection and thermal shutdown so will easily survive short circuits etc.

You do need to watch the start-up current draw though, this can cause a voltage drop which can reset the Crumble (but not damage it).

All the best,

Joseph

[Author]

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