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3lb-Melty

DylM0nster22·3lb-Melty

3lb-Melty PCB layout, top view — open source AVR/Arduino board by DylM0nster22

About the 3lb-Melty PCB

3lb-Melty is an open source AVR/Arduino PCB design by DylM0nster22, published on GitHub. It is a 2-layer board measuring 128 × 70 mm, with 37 components from 29 distinct parts.

Its main chip is the ATMEGA32U4-AU, from the AVR/Arduino family. Other key parts include the Adafruit_H3LIS311_Breakout, RC_RECEIVER and BUCK_CONVERTER. By type, the board carries 11 capacitors, 10 resistors, 4 ICs, 4 connectors, 4 diodes and 2 transistors.

From the project

This is the repo for me and my friends 3lb meltybrain

This is a 3lb combat robot that me and luke have designed. this is a special type of robot thats way more complcated then normal bots, normal bots just have normal wheels and then the spinning weapon right well this bot is the weapon, the two hugely overpowered motors act as drive motors set to spin oppisite directions from eachother so the enitre 3lb mass of the robot is the weapon for a greater moi and impact. this can be achieved by using a microcontroller like a arduino nano or in my case a adafruint itsybitsy 32u4 and hooking it to the reciever and allowing it to act as a controller for…

3lb-Melty, from the project README
From the project README

Main components on the 3lb-Melty

Adafruit_H3LIS311_BreakoutRC_RECEIVERBUCK_CONVERTERATMEGA32U4-AU

3lb-Melty bill of materials (BOM)

37 components, 29 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
Adafruit_H3LIS311_Breakout
U2
1
RC_RECEIVER
U4
1
BUCK_CONVERTER
U5
1
ATMEGA32U4-AU
Microchip Technology
U6
1
SUM110P06-07L-E3
Q1
1
2N7002
Q2
1
16MHz
Y1
1
Esc 2
J1
1
Amass_XT90-S
J2
1
Esc 1
J3
1
USB_C_Receptacle
J4
1
SMD_5.2x5.2mm_h1.5mm
SW1
1
D_Zener
D1
1
Blue LED ~ 3.5v / 20ma
D2
1
1.5KExxA
D3
1
USBLC6-4SC6
STMicroelectronics
D4
1
47uF
C1
2
22pF
C2, C4
1
4700uF
C3
5
0.1uF
C5, C6, C7, C8, C9
Show 9 more
QtyPartRefs
1
10uF
C11
1
10nF
C12
2
4.7k
R1, R2
1
10k
R3
1
1k
R4
1
150
R5
2
22
R6, R7
1
10k
R8
2
5.1k
R9, R10

3lb-Melty design files

The KiCad project lives in the DylM0nster22/3lb-Melty repository on GitHub; these links point at the commit this page was built from.

3lb-Melty: common questions

What microcontroller does the 3lb-Melty use?

The 3lb-Melty is built around the ATMEGA32U4-AU, from the AVR/Arduino family.

How big is the 3lb-Melty PCB?

The 3lb-Melty measures 128 × 70 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 3lb-Melty?

37 components, from 29 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the 3lb-Melty design files?

From the DylM0nster22/3lb-Melty repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the 3lb-Melty design in my own project?

The repository has no license, so all rights stay with DylM0nster22. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the 3lb-Melty 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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