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Simon Merrett

Genesis, analysis, synthesis,

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simon-merrett

This user joined on 07/15/2016.

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Alan Green wrote 11/23/2019 at 09:55 point

Thank you for following Laser Galvo Clock!

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Simon Merrett wrote 11/23/2019 at 21:11 point

@Alan Green de rien! 

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Kris Winer wrote 11/20/2019 at 23:52 point

Thanks for following my People Counter project SImon!

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Simon Merrett wrote 11/23/2019 at 21:11 point

@Kris Winer thanks for the rundown of different sensors. I'm interested in how the window / FOV blocking affects the speed of response on the calipile unit. Did it take much trial and error to get the aperture diameter and offset right? 

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Kris Winer wrote 11/23/2019 at 22:50 point

Not sure we have it right yet. The aperture doesn't affect the read rate of the sensor, at least not that I can tell but I haven't specifically looked at this. The aperture affects the change in temperature detected due to a human passing by. There is just one pixel, and the large field of view means the temperature rise is going to be averaged over a large area. For this application, it is better to narrow the field of view to obtain a larger (and I suppose faster) temperature rise rather than have the human heat island swamped by a sea of ambient background. Best will be slightly-angled but short tubes, probably designed into a 3D container. We are presently working to optimize this device, and the constriction is one of the design parameters.

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Kris Winer wrote 08/19/2018 at 15:26 point

Thanks for following my MAX32660 Motion Co-Processor project!

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Simon Merrett wrote 08/20/2018 at 09:09 point

Thank you for educating us on the implementation of these systems. Such a need for that, compared to the resources covering the theory, which are relatively easily available. 

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Jasmine Brackett wrote 05/14/2018 at 18:07 point

Great to meet you at Maker Faire UK!

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Simon Merrett wrote 05/16/2018 at 21:36 point

Great to meet you too! Still got that supercap tindie badge idea rolling round my head. Made one of the normal ones with my four year old last weekend https://i.imgur.com/TXERFAG.jpg

Sadly the pin and switch seemed to be missing from the other one you gave me (for my daughter) but I've ordered spare parts.

Still hasn't stopped us from shutting ourselves in our wardrobe for a disco using the one badge!

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Afdhal Atiff Tan wrote 04/03/2017 at 07:22 point

Hi Simon, thanks for following my battery balancer project! :)

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Simon Merrett wrote 04/03/2017 at 08:41 point

You're welcome. Julian Ilett would be very interested in this project and his YouTube channel has at least a couple of videos that discuss potential methods for efficient cell balancing.

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Afdhal Atiff Tan wrote 04/03/2017 at 16:47 point

Yup, I've seen his videos. Very interesting indeed.

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esot.eric wrote 03/29/2017 at 09:18 point

Howdy! Thanks for the follow!

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Simon Merrett wrote 03/29/2017 at 11:37 point

Eric(?), you're very welcome! I'm interested in this project because I am interested in robot arms and closed loop control (not experienced). I'm looking forward to reading more about the potential simplicity of your concept. So far, I'm not clear how it would work without resulting in a more complex need to know the states of the other degrees of freedom before working out each element's next move. But as I said, I have no experience of this area so I'm optimistic about the findings.

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esot.eric wrote 03/30/2017 at 06:25 point

Great thoughts, I'll address them in the next log-update! Prepare to be underwhelmed :)

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ottoragam wrote 09/26/2016 at 05:54 point

Thanks for the follow!

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Simon Merrett wrote 09/26/2016 at 06:56 point

You're welcome! Very interesting.

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