Main
About the Main PCB
Main is an open source AVR/Arduino PCB design by qweqq, published on GitHub under the MIT license. It is a 2-layer board measuring 158.8 × 65.7 mm, with 116 components from 35 distinct parts.
Its main chip is the ATMEGA8-P, from the AVR/Arduino family. Other key parts include the HD44780, 4017, 4051 and ULN2803. By type, the board carries 46 resistors, 24 diodes, 20 capacitors, 10 connectors, 7 transistors and 5 ICs.
From the project
Dude, where's my bike?!
Build a system that notifies you/a guard/a group of people if someone is trying to steal your bike! (and in case it is stolen provide information)
Main components on the Main
Main bill of materials (BOM)
116 components, 35 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATMEGA8-P | DIP-28__300 | IC1 |
| 1 | HD44780 | Pin_Header_Straight_1x16 | U1 |
| 1 | 4017 | DIP-16__300 | U2 |
| 1 | 4051 | DIP-16__300 | U3 |
| 1 | ULN2803 | DIP-18__300 | U4 |
| 4 | MOSFET_N | TO-92-FET-molded-wide-oval-DGS | Q1, Q2, Q3, Q4 |
| 1 | NPN | TO-92-Free-molded-wide | Q5 |
| 2 | PNP | TO-92-Free-molded-wide | Q6, Q7 |
| 1 | 14.7456MHz | HC-49V | X1 |
| 8 | CABLE | JACK_STEREO | J1, J2, J3, J4, J5, J6, J7, J8 |
| 1 | 5v | Pin_Header_Straight_1x02 | P1 |
| 1 | PI | Pin_Header_Straight_1x06 | P2 |
| 1 | 700mA | Resistor_Vertical_RM5mm | F1 |
| 1 | SW_PUSH | Pin_Header_Straight_1x02 | SW1 |
| 16 | DIODE | Diode_DO-35_SOD27_Horizontal_RM10 | D1, D2, D3, D4, D5, D6, D7, D8 +8 |
| 8 | BI_LED2 | Pin_Header_Straight_1x03 | D17, D18, D19, D20, D21, D22, D23, D24 |
| 1 | 470nH | Resistor_Horizontal_RM10mm | L1 |
| 8 | 100n | C_1206 | C1, C2, C3, C4, C7, C8, C9, C10 |
| 1 | 100u | Capacitor16x25RM7.5 | C5 |
| 7 | 100n | Capacitor6MMDiscRM5 | C6, C13, C14, C15, C17, C19, C20 |
Show 15 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 22p | Capacitor6MMDiscRM5 | C11, C16 |
| 1 | 22u | Capacitor10x16RM5 | C12 |
| 1 | 100n | C_0805 | C18 |
| 8 | 200 | R_0805 | R1, R2, R3, R4, R13, R14, R15, R16 |
| 10 | 100 | R_0805 | R5, R6, R7, R8, R17, R18, R19, R20 +2 |
| 8 | 47k | R_0805 | R9, R10, R11, R12, R21, R22, R23, R24 |
| 4 | 10k | R_0805 | R25, R26, R27, R28 |
| 4 | 10k | Resistor_Horizontal_RM10mm | R29, R30, R31, R32 |
| 3 | 2.2k | Resistor_Horizontal_RM10mm | R33, R42, R43 |
| 3 | 4.7k | Resistor_Horizontal_RM10mm | R34, R44, R46 |
| 1 | 33 | Resistor_Horizontal_RM10mm | R37 |
| 1 | RC1 | Resistor_Horizontal_RM10mm | R38 |
| 1 | RC2 | Resistor_Horizontal_RM10mm | R39 |
| 1 | 50 | Resistor_Horizontal_RM10mm | R41 |
| 2 | 100 | Resistor_Horizontal_RM10mm | R45, R47 |
Main design files
The KiCad project lives in the qweqq/dwmb repository on GitHub; these links point at the commit this page was built from.
Main: common questions
What microcontroller does the Main use?
The Main is built around the ATMEGA8-P, from the AVR/Arduino family.
How big is the Main PCB?
The Main measures 158.8 × 65.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Main?
116 components, from 35 distinct parts. The full bill of materials is listed on this page.
Where can I download the Main design files?
From the qweqq/dwmb repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Main design in my own project?
Yes, under the terms of its MIT license, which qweqq chose for the repository.
Can I test firmware for the Main 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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