A team from Sidmouth Science Festival went to Dorchester to help them out on Sunday 12th March.
The penalty shootout was very popular, with dads as well as kids
This is actually two systems. The shooter is a robot car with a servo to operate the footballer.
This is controlled by a radio remote control transmitter but it is a real robot because it does some
autonomous things (such as not driving off the table no matter what the operator does)
The goalie is just a servo to move the footballer back and forth. Is this a robot?
The knob controlling the movement is interpreted by the Raspberry Pico so that
you can't overstress the servo or go outside programmed limits, but it doesn't
really think enough to be classed as a robot
PicoBotD
The latest LegoBot is TOW TRUCK. This is another Pico-based robot using the Kitronik motor and servo board.
It has 4 wheel drive and a quite powerful arm servo. Distance measurement is done with the trusty old HC-SR04.
Power is from 4 rechargeable AA batteries. The superstructure is mostly standard Lego
but the servo bracket is a 3D printed Lego-compatible. The robot first scans taking distance measurements.
It then works out the angle of the nearest object
(hopefully its trailer) then spins to that angle, goes the measured distance, picks up the trailer and tows it a short distance.
PicoBotF
This LegoBot is DOZER. This is a Pico-based robot using the Kitronik motor and servo board.
It has 4 wheel drive and a quite powerful arm servo. Distance measurement is done with the trusty old HC-SR04.
Power is from 4 rechargeable AA batteries. The superstructure is mostly standard Lego
but the servo brackets are 3D printed Lego-compatibles.
Robot Workshop 2022
A Great Success!
Nearly 200 visitors enjoyed a huge range of robot-related activities and
demonstrations.
NeoPixels
The new TONKER beer delivery robot is beginning to take shape. Now with posh lighting.
3D Strength
So how strong are 3D prints anyway? I am making a few Ukraine Solidarity Belts
with 3D printed buckles (made in PETG)
Robot Workshop 2021
Kennaway House, Cellar Bar, Sidmouth,
Saturday 16th October 2021
The workshop was a great success. Over a hundred people came through the door.
Some of them came for 5 minutes and stayed for 2 hours!
The Mercy Dash, run by Team PiDrogen attracted a lot of attention, and competition.
Interested in a regular Sidmouth Coder Dojo / Code Club / Robot Workshop?
Contact us on
pandaAATTsidmouthrobotsDDOOTTcoDDOOTTuk Do you think it would work best in the Library? at the Youth Centre?
Weekly, monthly?
Let us know
MERCY DASH LIFTER 2
Latest video of the Mercy Dash container lifter
MERCY DASH LIFTER 2B
This is what the controllers screen looks like during a run. Apart from putting the name in it is all automatic
but there will also be some old favourites like PANDA and AMANDA
WEIGHTLIFTER
How much can a robot arm reliably lift?
PABLOBOT
This robot is now upgraded with AX12A serial servos:
TONKER 2
This robot has been through a few incarnations, including the infamous balloon-controlled
version of 2017, but has now been re-implemented on the same chassis, but in 3D printed
modules instead of Lego. It is now much more robust, as befits an outdoor robot.
It still does the same job, however, which is to wander around Sidmouth Science Festival
or other events enticing people to Come And See The Robots. It now has better quotes and
a tilt sensor as well as the usual ultrasonics and IRs. This makes it less likely to destroy itself
and less likely to cause damage.
The Strong Arm
Some of my robots have arms, e.g. Panda
and Connect4,
but being Lego, or glued acrylic, they can be a bit wobbly, so I am working on a 3D printed
arm which, when the design settles, I can print in carbon fibre for maximum rigidity.
The arm uses the wonderful Lewansoul servos, which have an idler opposite the driven
shaft, for an even drive. It uses a proper bearing for rotation, and, unlike most arms, has the
rotating servo alongside the base rather than underneath. This means that I could change the gear
ratio without too much trouble, or substitute a stepper motor if I wanted a huge swing.
The whole thing is powered off a Tamiya-style nominal 7.4 volt battery via two power
supplies: one at 5.1 volts for the Pi and the IR sensors, and one at 6.1 volts for the
servos. The 6.1 volt supply is on a relay, so you can switch it on without it going
berserk, even if you have yet to set up the servos.
It has my standard control panel with a couple of buttons, a few switches,
and a couple of LEDs. This controls a couple of canned demos.
Eventually, when rigid enough to have predictable movements, it will be the
basis for a new version of PABLOBOT, the drawing robot.
COVID-19
The 3dcrowd.uk
PPE project is over, as supply seems to have caught up with demand, so it's time
to get back to robotics, and maybe do a bit of maintenance on those tired printers!
MILLIE
Most robots travel on wheels, but you can use legs. MILLIE is a prototype
millipede (one segment anyway). It is built out of Lego, which is still the
fastest prototyping system around
Sidmouth Science Festival 2019
The Connect 4 robot attracted a lot of attention and even won one of its games!
This hard-working machine is really three robots. One plays the game; one
provides the player with counters on an elevator;
one sorts out the red and yellow counters. They all communicate via a
database and GPIO. It is a bit temperamental but fascinating to watch.
PANDA is an old favourite. This year's model now has a camera to help it to find the bomb.
This uses the Canny edge-detect algorithm to find the bomb's checkerboard pattern.
Connect 4
At last the mark I of the connect 4 playing robot is complete. There is lots more to
do, but you can get the general idea now.
Pablobot
Not really part of the Connect 4 project,a little side venture into rotating arms.
Is it Art?
Sidmouth Science Festival 2018
There is always a lot of interest in robots at the Science Festival.
This year it ran from Thursday 27 September to Sunday 14 October 2018 inclusive.
Check it out HERE (opens in a new window)
PANDA is a favourite. He picks up a toy bomb and drops it into a bucket of water
NO. It senses the door opening, and acts
on that by turning on a light, but it doesn't think.
Sense. Think. Act.
Is this a robot?
NO. It can certainly think, but it doesn't
really sense or act.
Sense. Think. Act.
Is this a robot?
NO. It looks like a robot, and it certainly acts,
but it doesn't sense or think
Sense. Think. Act.
Is this a robot?
YES. It's just a LEGO model, but it senses the world around it
through the bumpers at front and rear; it thinks about what to
do inside its Mindstorms brick, and it acts by moving around
and bulldozing things out of the way. It is a robot. You can see it in action
here:
Robot?
The word 'robot' was first used in its modern sense in a 1921
play R.U.R. (Rossum's Universal Robots) by the Czech writer, Karel Capek.
Not a lot of people know that.