DESCRIPTION
Explore the complete development ecosystem for Mark1 including source code, guides and learning resources below.
We crafted this impeller setup for builders seeking peak performance from their LFR. At high speeds, where passive grip begins to fade, it generates controlled negative pressure beneath the chassis to strengthen surface contact and maintain stability. Compact and intentional in design, it delivers added control precisely when high-speed runs demand it.
The Techgeeks Suction Impeller Setup is a compact active downforce module engineered for high performance LFR platforms. By utilizing a optimized impeller fan attached to a high speed coreless motor, it creates controlled negative pressure beneath the chassis to improve surface adhesion during demanding runs. Designed with a lightweight 3D printed housing and balanced structural geometry, it integrates seamlessly without disturbing weight distribution. The system enhances cornering stability, reduces slip at elevated speeds, and supports consistent performance across aggressive transitions — making it a focused upgrade for competition-driven builds.
ACCESSORIES
PACKED COMPONENTs
Good things come in small packages, and inside of
this you will find everything you need to get your
line follower up and running. Both hardware and
software included.
IMPELLER SETUP
◘ The Mark 1 LFR is a compact, high performance line follower robot built around the ATmega328P microcontroller using the Arduino Nano platform operating at 16 MHz and 5V logic level.
◘ The robot is powered by a 2S LiPo battery (7.4V / 11.1V). A dual channel TB6612FNG motor driver enables efficient PWM based speed control of the high RPM DC N20 gear motors, providing smooth acceleration and sharp turning capability.
◘ It features an 8 Channel IR Sensor Array (ARC8) to detect contrast between black and white surface. It is equipped with 2 wheel drive system combined with high traction rubber wheels that provide stability.
◘ The frame is a lightweight 3D printed chassis (PLA+/PETG). With an approximate weight of 140–160 grams and compact dimensions, it is optimized for speed, agility and competition performance that make the Mark 1 both beginner friendly and competition ready.
◘ Precision Line Tracking
◘ Smooth Corner Handling
◘ Real-Time Feedback System
SOFTWARE AND PROCESSING
◘ The Mark 1 LFR follows a structured control flow defined in setup() and loop(). On startup, the system waits for the left button press to initiate calibrate(). During calibration, the robot rotates using motorControl(100, -100) while recording minimum and maximum sensor readings.
◘ After pressing the right button, the robot enters run mode. In loop(), the readLine() function continuously reads and normalizes sensor data, identifying active sensors and determining whether the line is detected (onLine).
◘ If the line is present, linefollow() calculates positional error using weighted sensor inputs. A PID correction (using kp and kd) generates PIDvalue, which adjusts speedA and speedB around the defined robotSpeed. Speeds are constrained before being applied through motorControl().
◘ If the line is lost, recovery logic applies directional correction based on the last known error. This ensures stable tracking, smooth steering, and responsive real time control.
COLOR, MATTE
AND FINISH
Available in four color options, The matte chassis paired with high-traction rubber wheels and cleanly integrated components, delivering a cohesive, durable, and competition-ready finish.
*All the media present are for visual representation purposes only, actual product may vary.
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