Screw Shield V2 (HCARDU0074)

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admin
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Screw Shield V2 (HCARDU0074)

Post by admin » Fri Mar 04, 2016 3:57 pm

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This Screw Shield is a terminal expansion board which can be stacked directly on the female pins of an Arduino uno/mega/leonardo and allows easy connection for many sensor parts with no soldering required. This shield set (2 Boards) is fully Arduino compatible.

You can order yours here

ChrisSharp
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Re: Screw Shield V2 (HCARDU0074)

Post by ChrisSharp » Mon Feb 08, 2021 6:35 pm

There are 16 pins on the digital side labelled V, but there is no voltage on them, unlike the six V pins on the analogue side which have 5 volts on them.

I can't work out how 5v could get to the digital side unless AREF can be configured as an 5v output.

Am I missing something? Or is a jumper across from 5v on the analogue side required.

cheers
chris

PS I have the Screw Shield attached to a HC UNO+

andrew
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Re: Screw Shield V2 (HCARDU0074)

Post by andrew » Tue Feb 09, 2021 9:22 am

There are 16 pins on the digital side labelled V, but there is no voltage on them, unlike the six V pins on the analogue side which have 5 volts on them.

I can't work out how 5v could get to the digital side unless AREF can be configured as an 5v output.

Am I missing something? Or is a jumper across from 5v on the analogue side required.

Looking at the layout of those pins I think they are intended for directly connecting servos to them. The problem with servos is they can take a lot of power. Even the little ones can take in excess of 1A and as such you wouldn't want to power them from the 5V source of your Arduino as it would overload it. So the 16 'V' pins on the digital side are instead connected to the VCC terminal block so you can connect your own separate external 5V supply.
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ChrisSharp
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Re: Screw Shield V2 (HCARDU0074)

Post by ChrisSharp » Tue Feb 09, 2021 11:36 am

Thanks. That makes sense.
I'm using it as a substitute for the Arduino Compatible Sensor Shield V4.0 (HCARDU0015) so was thinking of it more from a sensor point of view rather than a servo. Now you have pointed out the servo issue I can see the benefit of those pins no being connected. And it's easy enough to jumper across 5V when I'm using low current devices.

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