Can I wire a SG90 servo directly to a crumble board? I am using connector blocks

[mavis.taylor]

We are using crumble boards fitted with connector blocks to drive ‘Mars Rovers’ vehicles. We want to use micro servos to operate levers but trying to keep cost down. I changed a SG92R for a cheaper SG90. As it does not have a Crumble connector I tried wiring it directly to the power and the D inputs. A SG92R had been working there but this does not. Can anyone tell me, is this wiring wrong or do I have a faulty servo?

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[Joseph]

Hi Mavis,

You can use SG90 servos with the Crumble. We settled on SG92 servos because they seemed to perform better (no twitching and so on).

It’s worth checking the power connections. I can quite make out the wiring from the photo, but red should be +ve and brown -ve.

Hope this helps, but let me know if you are still having problems.

Thanks,

Joseph

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