HardLabs

Line follower

rmingon·line-follower·hardware/line-follower.kicad_pcb

Line follower PCB layout, top view — open source AVR/Arduino board by rmingon

About the Line follower PCB

Line follower is an open source AVR/Arduino PCB design by rmingon, published on GitHub. It is a 2-layer board measuring 93.5 × 97.5 mm, with 84 components from 24 distinct parts.

Its main chip is the ATmega2560-16A, from the AVR/Arduino family. Other key parts include the QRE1113GR, MX1508 and LM317_SOT-223. By type, the board carries 33 resistors, 21 capacitors, 13 ICs, 8 diodes, 5 connectors and 2 transistors.

It belongs with the robotics & motion and sensors designs in this gallery.

From the project

Line follower robot with internal fan for pin to the ground and 10 reflectances sensors head

This project is a Line Follower Robot using an ATmega2560 microcontroller. It features motor control, a reflective sensor array for line tracking, a fan controller, and voltage regulation.

- MCU: ATmega2560-16A - 10x QRE1113GR reflective IR sensors - 2x MX1508 motor drivers (H-bridge) - MOSFET-based fan control (2N7002) - Power via battery with 5V regulation (AMS1117) - 6x status LEDs - Standard AVR ISP programming header - Custom-designed PCB

Line follower, from the project README
From the project README

Main components on the Line follower

QRE1113GRATmega2560-16AMX1508LM317_SOT-223

Line follower bill of materials (BOM)

84 components, 24 distinct parts.

QtyPartRefs
10
QRE1113GR
U1, U2, U3, U4, U5, U6, U7, U8 +2
1
ATmega2560-16A
U11
1
MX1508
U12
1
LM317_SOT-223
U13
1
Si2319CDS
Q1
1
2N7002
Q2
1
Crystal
Y1
1
AVR-ISP-6
J1
2
Conn_01x02
J2, J3
1
Conn_01x02
J4
1
Conn_01x02
J5
1
SW_SPST
SW1
1
1N5819
D1
7
LED
D2, D3, D4, D5, D6, D7, D8
16
10nF
C1, C2, C3, C4, C5, C6, C7, C8 +8
3
C_Polarized_Small
C14, C15, C21
2
20p
C16, C17
10
100
R1, R3, R5, R7, R9, R11, R13, R15 +2
10
220
R2, R4, R6, R8, R10, R12, R14, R16 +2
1
1M
R21
Show 4 more
QtyPartRefs
2
R_Small
R22, R23
7
2K
R24, R25, R26, R27, R28, R29, R31
2
10K
R30, R33
1
1K1
R32

Line follower design files

The KiCad project lives in the rmingon/line-follower repository on GitHub; these links point at the commit this page was built from.

Line follower: common questions

What microcontroller does the Line follower use?

The Line follower is built around the ATmega2560-16A, from the AVR/Arduino family.

How big is the Line follower PCB?

The Line follower measures 93.5 × 97.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Line follower?

84 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the Line follower design files?

From the rmingon/line-follower repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Line follower design in my own project?

The repository has no license, so all rights stay with rmingon. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Line follower without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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