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Simon Merrett

Genesis, analysis, synthesis,

Bristol
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92 Followers
24 Following
8 Projects
142 Likes
simon-merrett
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This user joined on 07/15/2016.

9.8k
356
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Strain wave or harmonic drive gears are cool. As a cheap analog for metal or flex filament splined cup, try using timing belts.
Project Owner Contributor

Strain Wave Gear with Timing Belts

Simon MerrettSimon Merrett

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Much cleverer people hacked the orginal UT390B laser range finder but no-one seems to have published what we know about the UT390+.
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Peek inside UNI-T UT390B+

Simon MerrettSimon Merrett

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Use servos, alu profile, timing belt and 608 bearings to make one.
Project Owner Contributor

Cheap Linear Actuator

Simon MerrettSimon Merrett

500
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Indoor (lawn) bowls wheelchairs can be motorised to make the sport more accessible. We motorised one with steppers for 10% of a kit cost.
Project Owner Contributor

Stepper-motorised wheelchair

Simon MerrettSimon Merrett

2.1k
7
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A proof of concept ultra-low cost jog (and other gcode commands) control pendant for grbl CNCs. Concurrent with PC serial! DIY macros!
Project Owner Contributor

grbl "Man in the middle" CNC jog pendant

Simon MerrettSimon Merrett

1.3k
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Audio feedback for the brain-injured who need help learning to balance again.
Project Owner Contributor

SoleSense

Simon MerrettSimon Merrett

View all 8 projects

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Modular self-reconfigurable robot, focused on all-terrain search and rescue operations using bio-inspired locomotion mechanisms
Project Owner Contributor

Dtto - Explorer Modular Robot

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Building an open source robot arm for makers and small businesses
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5+ Axis Robot Arm

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or "flip dotters" if you want. Let's just talk about flip-dot/flip-disc displays and projects using them :-)
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Dot flippers

Yann Guidon / YGDESYann Guidon / YGDES

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X carve Inspired Laser CNC machine which can help Develop quality PCB at home without using expensive photography films and dusty milling.
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A high speed and high torque robotic actuator using low-cost brushless motors, custom controller, 3D printed parts and bearings.
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3D Printed Robot Actuator

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The WEEDINATOR project continues .... The inevitability of robots working on farms draws ever nearer ....
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WEEDINATOR 2018

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Follow this project to learn how to use FPGAs and incorporate them into your projects.
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The Hobbyists Guide to FPGAs

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Measures wind speed via inertial sensors and rain with capacitive. Maintenance free, LPWAN, 3D printed (Not yet another AWS)
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Weather Pyramid

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Sightless Navigation And Perception (SNAP) translates surroundings into sound, providing continuous binaural feedback about the environment.
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[ an open-access peer-reviewed journal ]
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Hackaday Journal of What You Don't Know

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A credit card size Wireless Temperature & Humidity Node power by CR2032 Coin Cell
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Super-small, ultra-low-power 96 MHz Cortex M4F co-processor manages sensors and processes data allowing the MCU host attend to other things.
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MAX32660 Motion Co-Processor

Kris WinerKris Winer

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60 GHz radar distance sensor for your robot
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Robot Radar Module

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Turn an old servo into a "forever flashlight"
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Servo Generator Light

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A minimalist 1.5V coin cell led tree with all components and power source confined within a mini breadboard.
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The thinnest Magnetic Actuator!
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Flexible PCB Actuator

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A high torque, high precision, Strain Wave Gear (harmonic drive) based 3D printable closed loop servo actuator for use in robotic arms
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Open HD

Sam ArmstrongSam Armstrong

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An open-source, 4-channel differential dynamometer for post-stroke rehabilitation. Includes 4 force sensors, device with display and PC soft
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System which allows individuals to gauge how well they are performing crucial pressure relief exercises in their wheelchairs.
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RiseUp! System: Wheelchair Pressure Relief Monitor

drewmandrewman

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Smart insole for diabetic people
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Ebers

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Easy 3D printer electronics 100% compatible with RAMPS 1.4 / Marlin
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OVM20 Lite

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Interference-resistant sensor for multiple-robot environments
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Spread-Spectrum IR Proximity Sensor Module

Ted YapoTed Yapo

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

Thanks for following my MAX32660 Motion Co-Processor project!

  Are you sure? yes | no

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. 

  Are you sure? yes | no

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

Great to meet you at Maker Faire UK!

  Are you sure? yes | no

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!

  Are you sure? yes | no

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

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

  Are you sure? yes | no

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.

  Are you sure? yes | no

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

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

  Are you sure? yes | no

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

Howdy! Thanks for the follow!

  Are you sure? yes | no

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.

  Are you sure? yes | no

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 :)

  Are you sure? yes | no

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

Thanks for the follow!

  Are you sure? yes | no

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

You're welcome! Very interesting.

  Are you sure? yes | no

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