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Simon Merrett

Genesis, analysis, synthesis,

Devon
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134 Followers
23 Following
11 Projects
270 Likes
simon-merrett
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This user joined on 07/15/2016.

14k
393
42
113
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

5k
65
26
71
This PCB footprint allows you to use 3mm x 6mm edge of PCB and a SOIC-8 clip as a cheap and space-efficient connector
Project Owner Contributor

SOICbite Programming/Debug Connector Footprint

Simon MerrettSimon Merrett

10.7k
26
11
16
Much cleverer people hacked the orginal UT390B laser range finder but no-one seems to have published what we know about the UT390+.
Project Owner Contributor

Peek inside UNI-T UT390B+

Simon MerrettSimon Merrett

957
12
1
13
Use servos, alu profile, timing belt and 608 bearings to make one.
Project Owner Contributor

Cheap Linear Actuator

Simon MerrettSimon Merrett

1.6k
307
0
10
Audio feedback for the brain-injured who need help learning to balance again.
Project Owner Contributor

SoleSense

Simon MerrettSimon Merrett

726
9
9
10
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

View all 11 projects

36k
721
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244
Modular self-reconfigurable robot, focused on all-terrain search and rescue operations using bio-inspired locomotion mechanisms
Project Owner Contributor

Dtto - Explorer Modular Robot

AlbertoAlberto

79.5k
2.6k
39
237
Building an open source robot arm for makers and small businesses
Project Owner Contributor

5+ Axis Robot Arm

Dan RoyerDan Royer

8.6k
45
18
30
or "flip dotters" if you want. Let's just talk about flip-dot/flip-disc displays and projects using them :-)
Project Owner Contributor

Dot flippers

Yann Guidon / YGDESYann Guidon / YGDES

2.8k
36
13
16
X carve Inspired Laser CNC machine which can help Develop quality PCB at home without using expensive photography films and dusty milling.
Project Owner Contributor

CNC Laser PCB Maker

manjuprasadmbasangimanjuprasadmbasangi

270
11
1
7
Let's talk about radio.
Project Owner Contributor

RF Chat

Ted YapoTed Yapo

16.7k
213
27
146
We've been waiting a long time for someone to post the plans of a working LiDAR. Is it really going to happen?
Project Owner Contributor

Open Source LiDAR - Unruly

Laser DeveloperLaser Developer

13.5k
270
29
190
A better-than-servo motor for robotics
Project Owner Contributor

Custom motor for robotics

MishaMisha

6.5k
103
54
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The reduction of strain-wave, but using a 'single' stage planetary gearset.
Project Owner Contributor

MPRT - Modified planetary robotics transmission

Daren SchwenkeDaren Schwenke

4.3k
244
20
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A compact modular design of the strain wave gear for general robotic applications.
Project Owner Contributor

Compact Strain Wave Gear Actuator(s)

Leo VuLeo Vu

3.1k
64
3
71
Open hardware, 3D printed, 6 axis robot arm
Project Owner Contributor

Sixi 2

Dan RoyerDan Royer

2.4k
19
3
10
How an Attiny85 self-regulates its cheap power supply.
Project Owner Contributor

A Cheap And Dangerous Garden Light Boost Converter

Randy ElwinRandy Elwin

1.8k
36
4
29
First prototype of an open kit to bring electric drive to any existing wheelchair for cheap (and -hopefully- safe)
Project Owner Contributor

Open electric drive kit for wheelchairs - alpha v

adria.junyent-ferreadria.junyent-ferre

1.6k
204
5
24
A general purpose robot joint using a cycloidal gearbox and an ODrive modified to support active compliance
Project Owner Contributor

3D Printed Robot Joint with Active Compliance

Tim WilkinsonTim Wilkinson

1k
174
5
11
Creating a break-out board for the ATtiny1616 where sketches can be uploaded from Arduino with the Arduino UNO or a modified AVR JTAG ICE
Project Owner Contributor

ATtiny 1-series with Arduino support

Sander van de BorSander van de Bor

990
305
4
16
A high speed, highly sensitive piezoresistive sensor matrix that provides quantitative information related to prosthetic fit.
Project Owner Contributor

Piezoresistive sensor matrix

chris.coulstonchris.coulston

810
15
2
15
Feature-packed over-discharge protection. Set the cell-count (2S to 7S), minimum cell voltage and dip-time below threshold. Fully hackable!
Project Owner Contributor

Universal LiPo/Li-ion UVLO (undervoltage lockout)

JanJan

415
13
6
10
Just want to share the experience of building pick and place machine.
Project Owner Contributor

Details of pick and place machine build.

TeemoTeemo

384
3
3
5
Prototyping Playground for SMD and TH Components
Project Owner Contributor

Blue Board #01

Alan GreenAlan Green

319
5
2
6
Less of a project than a collection of blog posts
Project Owner Contributor

Learning openEMS

Ted YapoTed Yapo

203
1
0
1
Clap-clap, light goes on. Clap-clap, light goes off. This makes me happy.
Project Owner Contributor

Happy Clap Switch

Alan GreenAlan Green

110
3
0
4
All I/O pins on headers, breadboard compatible, with 3V3 voltage regulator on board. KiCAD/Gerber files in the files section!
Project Owner Contributor

ATTINY x61(A) breakout board (SOIC)

JanJan

54
1
6
1
hi res absolute hollow shaft optical encoder
Project Owner Contributor

Encoder project

Dan RoyerDan Royer

1
0
1
An upcoming reference design for energy harvesting
Project Owner Contributor

Tiny voltages

Matthias KochMatthias Koch

View all

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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.

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