Let's Make Robots! | RobotShop


Spherical Pendulum Robot Ball From Scratch


This will be a page where I'll share progress on developing a pendulum robot ball. At the moment I don't now much more than an hour of research. 

My plan is to 
Do a CAD drawing in Inventor 
3D print a prototype.

Solar powered motors

Test with solar panels and motors!
3 solar panels give enough current to move a couple of these popular 3-6v motors, with 6 470uF capacitors as buffer.

I will test soon with an arduino nano and a driver:)


Parametric Printable Meccano

Here a link to a parametric meccano model.

If you know really little about OpenSCAD you can easily configure this file to make meccano-like pieces.
I modeled it because i need often to whip up a mechanical prototype, for hackatons, demo or just playing around :)
At the moment there are the plain piece, the 90° and 45° bent pieces and the C shaped piece, like in the image.

Making robots

Just joined the site after reading the entry on six-wheel robot suspension by Oddbot and seeing Titan in action.

My next mini project - Self balancing bot

Almost done with my boom/gripper build and wanted to make another quick bot (well quick to build) Going to do a self balancer. Need to find an IMU or accelerometer, I have some somewhere in a box....  Only found a compass and just mounted it to look for a good place. May place it lower and the battery higher.  Going to make a tuning python GUI to set the balance variables via bluetooth.

a new day

Today i made some changes to my motor shieldboard.

I found some errors in It :

- the power supply of the motors was connected to the logics powersupply.
- the sensing output was directly connected to gnd. Now i have a resistor between.

I also made a new prototype shield for testing purpose. 

Playing around a some with Actobotics bits-n-bobs - Mobile boom and claw

Playing around a some with Actobotics bits-n-bobs last night and tonight a bit.  Marked-up a claw and boom bot with some parts.  Not sure if this will be the final design, but it works ok this way just moving the arm up an down. I may make or buy a gear box for it, unsure now as of yet. I may even use a tentioning spring. Just something to do to pass the time! :)

First steps again

My first steps in restarting my project was :

- Installing the Arduino IDE and trying to connect to my arduino board.
- Trying to figure out how the hell I connected the L298N driver to the arduino board :)
- offcourse writing everything down in a notebook

Next step is figuring out how I did the PWM on the L298N driver.
After that trying to reprogram my robot, since I lost the original source code, luckely for my it wasn't that big 

Pi Droid Alpha: New robot controller for the Raspberry Pi designed for education & makers

Pi Droid Alpha

Pi Droid Alpha is the best educational Robot Controller for the Raspberry Pi

I had a lot of great feedback from teachers on my RoboPi advanced robot controller for the Raspberry Pi, however most asked for a less powerful - and lower priced - alternative for simpler Robots. I listened :)

Wifi/Web controlled rover

I consolidated all of my Wifi/Web rover playing onto another chassis. I have the code mostly prettied up and should port easily to any Linux SBC. The code started on a Yun, touched-up and re-tooled on a PCDuino, then finally at home on an RPI!

I may post this bot here on LMR, but figured if anyone wanted to look at the code etc, they could.

Here is it on Instructables.

Gooseneck chassis wired for webing:

Building Scatolot MK IV

With 3d printed BaasWheels!
For offroad conquer!
Or awful slippage on flat surfaces

Needs to be fixed to the base somehow.

The Actobotics Warden

I have been sent a chassis to do a review on and will post one in the next few weeks. It comes from Robotzone/ServoCity and is called the Warden.

Motor ramping up and down

As of late, I had added some ramping to my motor driving code. I started with just ramping up but have added ramping down to stop as well now. Most hi-end motor controllers like the Sabertooth and RoboClaw do this for you, but it's nice to have on cheaper controllers to.

Greetings from Spain

Hi @all,

My name is Jose Luis "Josele" Perez. I live in Mijas, a village in Costa del Sol, Malaga, Spain. Mijas is close to Fuengirola and Marbella, the south of the sunny Spain

I got my degree in Physics, electronics, but I've been dealing with solders and electronic devices since I was a teenager... a few years ago haha! I still remember the old AC188K transistors ... a romantic dream nowadays !!

And my robot starts.

I have converted a Parallax BOE-Bot to run with an Arduino Pro Mini. It is my first step to converting an old electric wheelchair over to being a fully autonomous robot.

Found out that you have to modify the Board Of Education to program the Pro board in circuit.



project tracked byped

I'm working with a poppy robot platform as its complete parts list was easy to download and 3D print. I've decided not to use the dynamixel servos and instead made an adapter housing for standard hobby servos to be used. This is great for cost but it may bite me in the butt later as I now have limited support with my robot from the poppyrobot project group and must learn everything on my own. Blah blah Wha Wha. 


I became a member of Let's Make Robots a couple days ago.  That didn't last long.  I had been told what a helpful and friendly site this is.  That isn't the impression I got.  I replied to a post that I felt was giving bad advice.  I won't link to it.  It is easy enough to find if you like.I asked the poster, who is apparently a fourteen year old, to clarify their answer because I was afraid someone might damage their equipment following that advice.  the repsonse to that was basically that it was only a nine dollar board so who cared if they blew it up.

Real Life or Something Like It

i may have mentioned this in passing, but I'm divorcing my wife. I will file in the next couple of weeks. I could divorce her for cause but I'd rather do the simpler no-fault divorce because it will mean I can put this behind me much more quickly.

Unfortunately this means that I have to pack up all my stuff and anything I don't want gets sold or given away. I'm assuming it will take about three months to get the house in order before I can find a new place and unpack again.

Cheap 40W Laser Engraver from China

I have wanted a laser engraver for quite some time but the price has always been prohibitive for me. Recently though, I found some engravers from china on Amazon for about $500.00 USD and free shipping. Plus, I contacted the vendor and found that the unit would ship from California. I read all the reviews and they all agreed that the machine is great. However, the downside of these machines was the software that is included. After carefully considering all the relevant information I decided to purchase one.

It priiints!

Finally my 3drag prints after a whole brain operation, which involves using RAMPS, rewriting parts of the firmware, resoldering part of the arduino shield and drawing with a 3d pen missing and weak parts. Started october building it o.o

Little Back PI wagon reborn!

Well after a few starts, stops and redo's on the chassis, I have a new iteration of my Pi wagon. I have skipped publishing anything about the last two of three :)

MAKE: Skill Builder - Hydraultics for Robots

I wrote a quick tutorial covering some of the basic concepts of hydraulic systems, and how that applies to a simple robotic arm project. Read more on MAKE... 


Swarm Robots w/ extras

I'm thinking of trying a swarm robot project for sometime in the future. However, I want to do something different.

I'm thinking that individual swarm-bots might not be too intelligent, but what if each of them had a neural network, and with communication between bots, parts of the neural networks can combine (Holy Mighty Morphing Power Bots, Batman!) via radio.

Ridicule Page

Hi all,


I'm still working on my robot, however the mechanical side is almost complete, the electronics are almost complete, but the coding still remains to be finished.


Ready for the Zombie robot (or processes) Apocalypses

Had several laptop battery packs with 18650 in them. Opened the first two up and found 2.2mah Samsung and Sanyos. I have two more to open.  I'm sure the older one has lower rated batteries in it, but the other should be about the same as these. I plan to make one more 7.4v pack and one 11.1v and leave the rest for 18650 holders I have.