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Simon Merrett

Genesis, analysis, synthesis,

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Bristol
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35 Followers
26 Following
7 Projects
84 Likes
simon-merrett
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eye
4.4k
users
306
comment
34
skull
49
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 Merrett

eye
4.5k
users
16
comment
9
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10
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 Merrett

eye
437
users
8
comment
1
skull
8
Use servos, alu profile, timing belt and 608 bearings to make one.
Project Owner Contributor

Cheap Linear Actuator

Simon Merrett

eye
268
users
4
comment
9
skull
6
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 Merrett

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99
users
1
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0
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5
If you want to post project logs with strikethrough text and don't know where to start, try following this project..
Project Owner Contributor

Strikethrough on HaD's <del>Redactor</del> editor

Simon Merrett

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880
users
9
comment
6
skull
3
An experimental torch/flashlight intended to be safer for eyes, completely inspired by and built upon the TritiLED project
Project Owner Contributor

Yapolamp

Simon Merrett

View all 7 projects

eye
23.2k
users
655
comment
25
skull
190
Modular self-reconfigurable robot, focused on all-terrain search and rescue operations using bio-inspired locomotion mechanisms
Project Owner Contributor

Dtto - Explorer Modular Robot

Alberto

eye
1.4k
users
28
comment
13
skull
14
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

manjuprasadmbasangi

eye
1.9k
users
23
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5
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14
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 / YGDES

eye
11.5k
users
115
comment
7
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78
An outside pole mounted aerial picks up RF signals which are then filtered, amplified and re-transmitted through a second inside aerial.
Project Owner Contributor

Cell Phone 4G LTE Repeater / Booster / Femtocell

TegwynTwmffat

eye
10.7k
users
87
comment
15
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61
An axial compressor that is designed to be produced inexpensively by the daily hobbyist
Project Owner Contributor

3D Printed Axial Compressor

noob_sauce

eye
9.6k
users
133
comment
25
skull
121
A vintage robot arm.
Project Owner Contributor

Walter

Jochen Alt

eye
8.7k
users
58
comment
11
skull
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A device that monitors the statistics of the magnitude and the 3-D direction of seismic noise might detect earthquakes before they happen.
Project Owner Contributor

Device for Seismic Noise Analysis

michael d.

eye
7.6k
users
101
comment
12
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64
Customizable linear actuators made easy....and cheaper.
Project Owner Contributor

Open Actuator System: Maker Muscle

Deezmaker

eye
4.7k
users
197
comment
13
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95
3D printed MakerWheels integrate with standard threaded rods and screws to create low cost linear and rotary motion systems.
Project Owner Contributor

MakerWheel

Scott Winroth

eye
4.4k
users
205
comment
9
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33
An open source HW & SW motor controller for fine-grained control of brushless DC motors for robotics.
Project Owner Contributor

SmoothControl

Matthew Moore

eye
4k
users
42
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6
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24
The most general purpose hobby vise.
Project Owner Contributor

Maker's Vise

Greg Stephens

eye
1.8k
users
39
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1
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20
Open Hardware scanning laser rangefinder
Project Owner Contributor

Open Simple LIDAR

iliasam

eye
1.8k
users
42
comment
0
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56
An open design robotic arm, made with dc motors, 5 degrees of freedom, can pick up 5 Kg at 1.50 m and with the lowest cost posible
Project Owner Contributor

DIMER MKII, Large open robotic arm

Antonio Regueira

eye
1.5k
users
30
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12
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23
Develop user tracking technology and demo it using a rover robot to follow its user.
Project Owner Contributor

Robo-Dog

Radu Motisan

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935
users
20
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7
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13
This cell balancer will transfer electrical charges from a strong cell to a weak cell. Ideal for electric vehicles.
Project Owner Contributor

Low-Cost Non-Dissipative Active Battery Balancer

Afdhal Atiff Tan

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910
users
40
comment
5
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17
An open-source, 4-channel differential dynamometer for post-stroke rehabilitation. Includes 4 force sensors, device with display and PC soft
Project Owner Contributor

Dynamometer for Post Stroke Rehabilitation

Sergei V. Bogdanov

eye
400
users
5
comment
0
skull
7
A new kind of gearbox. Holonomic transmission, direct-drive and continuously-variable. From reverse to full-forward, and in any direction.
Project Owner Contributor

The Robot with Balls Experiment

RoGeorge

eye
391
users
7
comment
0
skull
7
Create gear boxes with a laser cutter
Project Owner Contributor

GearBoxes.py

Florian Festi

eye
213
users
7
comment
1
skull
7
The reverse engineering and rebuilding of a classic flip-dot display.
Project Owner Contributor

Flip'n Dots

Shaun

eye
148
users
9
comment
3
skull
14
It seems like motion-algorithms could be significantly simpler than the explanations I've seen... So here I ponder.
Project Owner Contributor

Iterative Motion

esot.eric

eye
135
users
4
comment
0
skull
0
Couldn't fit another laser into the name
Project Owner Contributor

Lasercut, UV laser PCB printer

JLAM

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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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