HardLabs

Hope bike

Le-Dome-RDS·hope-bike·electronic parts/power_management_board/DC22-PCB HW4-IE01/DC22-PCB1.kicad_pcb

Hope bike PCB layout, top view — open source PIC board by Le-Dome-RDS

About the Hope bike PCB

Hope bike is an open source PIC PCB design by Le-Dome-RDS, published on GitHub. It is a 2-layer board measuring 129 × 66 mm, with 88 components from 31 distinct parts.

Its main chip is the PIC12F1822, from the PIC family. Other key parts include the LM2576, 78L05, ASC712, LM7812 and PIC16F1509. By type, the board carries 31 capacitors, 27 resistors, 11 ICs, 7 diodes, 6 transistors and 4 connectors.

From the project

An open source Pedalling Assistant Sytem for 26" wheeled bikes

This folder contains datasheet, eagle project and schematic for the three different PCB files :

the button card that contains the three buttons used for the control of the speed by the user, the command card that contains LEDs used to visualize both the battery level and the speed assist level. It also contains the arduino board. * the power management card that contains all the power electronic stuff necessary to drive the brushless motor using the electrical power battery.

Main components on the Hope bike

LM257678L05ASC712LM7812PIC12F1822PIC16F1509IRS21850IR4427

Hope bike bill of materials (BOM)

88 components, 31 distinct parts.

QtyPartRefs
1
LM2576
U1
1
78L05
U2
1
ASC712
U3
1
LM7812
U4
1
PIC12F1822
U5
1
PIC16F1509
U6
3
IRS21850
U7, U8, U9
2
IR4427
U10, U11
6
MOSFET_N
Q1, Q2, Q3, Q4, Q5, Q6
1
16MHz
X1
1
CONN_8
P1
1
CONN_12
P2
2
CONN_5
P3, P4
1
12V
D1
1
DIODESCH
D2
5
DIODE
D3, D4, D5, D6, D7
1
100µH
L1
2
220µF 50V
C1, C27
14
10µF 50V
C2, C5, C6, C7, C9, C10, C11, C12 +6
2
10nF
C3, C8
Show 11 more
QtyPartRefs
1
680µF 16V
C4
12
1nF
C15, C16, C17, C21, C22, C23, C24, C25 +4
2
2,2K
R1, R6
8
1K
R2, R14, R15, R16, R17, R18, R19, R22
1
82k
R3
2
56K
R4, R20
1
10K
R5
1
100E
R7
6
100
R8, R9, R10, R11, R12, R13
3
100E
R21, R23, R24
3
4,7K
R25, R26, R27

Hope bike design files

The KiCad project lives in the Le-Dome-RDS/hope-bike repository on GitHub; these links point at the commit this page was built from.

Hope bike: common questions

What microcontroller does the Hope bike use?

The Hope bike is built around the PIC12F1822, from the PIC family.

How big is the Hope bike PCB?

The Hope bike measures 129 × 66 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Hope bike?

88 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the Hope bike design files?

From the Le-Dome-RDS/hope-bike repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Hope bike design in my own project?

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

Can I test firmware for the Hope bike without the hardware?

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

Similar boards