Lego Technic Single Motor Tank V2.0
Here I present my second new and improved version of a lego technic tank that is driven by a single lego power functions motor. In this version the gearing mechanism has been optimized and far fewer gears are used to create the four different track direction combinations, namely both forward, both reverse, one forward & one reverse (turn left), and the opposite to turn right. Also the motor has been upgraded to an XL power functions motor instead of the large power functions motor. This gives an extra 0.5 watts of peak power.
The lego RC tank can be controlled remotely using a single remote channel and driven forwards, backwards, and steered left and right. These functions are implemented by exploiting the direction of rotation of the motor to either drive the tank or select one the four track functions.
This is done by a swinging liftarm with a gear that connects the motor output to one of two separate axles - one for driving the lego tank and one for selecting the track functions.
The track functions are built using 2 orange rotary catches to switch a lego gearbox design that allows both tracks to be selected to drive forwards or backwards or to drive in either of the two opposite directions for steering.
The track function selector uses a 90 degree stepper and a knobbed wheel to drive the rotary catches. The lego technic tank has an indicator on top to show which function has been selected.
More to explore
Lego Technic Single Motor Tank
Here I present a lego technic tank driven by a single lego power functions motor. The lego RC tank can be controlled remotely using a single remote channel and driven forwards, backwards, and steered left and right. These functions are implemented by using a single large PF motor and exploiting t...read more
Lego Technic RC 3 SPEED CAR - change gears, drive and steer using remote control
An improved version of a lego technic RC 3 speed gearbox is implemented into a remote control lego car. This video shows three main improvements over the previous gearbox design. The first is an improvement is to replace the 90 degree bugatti stepper with a PF servo motor reducing the gearb...read more
Lego 2 speed automatic car. Part 1
This video explores the use of the lego technic "smoothly switching 2 speed automatic gearbox" inside of a test car to see how well it works to climb up a ramp.
The gearing ratio of the 2nd gear of the 2 speed automatic gearbox can be set using a manual 4 speed gearbox to choose...read more
LEGO Technic MOC: 1023 SPEED CAR
A 1,023 speed gearbox has been built into a Lego Technic remote controlled car chassis. The car can be steered and driven via remote control using two channels. The gears can be manually changed using ten selectors that drive ten differentials. This allows for one of 1023 different speeds to be s...read more
Lego Technic Powered Up 3 Speed Automatic Car
This video presents a new lego technic 3 speed automatic RC car. The gearbox uses the lego technic powered up hub and 3 motors to drive, steer and switch gears. The car's 3 speed automatic gearbox has 3 forward speeds with gear ratios 1:1, 3:5 and 1:5 and has been programmed us...read more
Lego Technic Omni Directional Vehicle v2.0
This is an improved version of the Lego Technic Omni Directional RC Vehicle v1.0 (https://youtu.be/crj3kOiSmHg). Several improvements are made in this model mainly around the mode switching from driving forwards and backwards to rotating on the spot. In the previous model there was a lot of gear ...read more
Lego Technic Omni Directional RC Vehicle v1.0
This Lego Technic RC vehicle is modeled on the Roomba vacuum cleaner from iRobot. The Roomba can drive forwards, backwards and rotate on the spot. This RC lego technic model attempts to do the same but with four wheels instead of two, similar to a supermarket trolley. The vehicle can switch betwe...read more
Lego Technic 2 Speed Auto Car Ramp Challenge - Part 2
A lego technic 2 speed automatic gearbox is put to the test by incorporating it into a lego 2 speed automatic car. This lego 2 speed automatic gearbox implements a number of design principles aimed at improving the gearbox performance - namely of placing the torque detector on a separate pa...read more
Lego Technic 7 Segment LED Panel - Hexadecimal Counter
This video shows a Lego Technic 7 segment LED panel that can count upwards or downwards using a track driven program via tow ball pins. The LED display can be programmed to show digits or one of 17 different letters to make a sequential display to animate small text messages.
The panel is...read more
Lego Technic Beyblade Battle Launcher
This video presents a Lego Technic version of the spinning top battle game "Beyblade". A Lego Technic launcher for spinning tops made out of Lego is demonstrated and a number of battles are fought between various top designs. The launcher uses a high speed buwizz buggy motor to drive th...read more