2 layers82.4 × 53.6 mm
Pico hd mcu v3
ozgend/hd-mcu
bluetooth supported mcu for harley davidson 99-03 with raspberry pi pico
47 parts4GPL-3.0
2 layers87.9 × 88 mm
Pico hd mcu v2
ozgend/hd-mcu4bluetooth supported mcu for harley davidson 99-03 with raspberry pi pico
- Size
- 87.9 × 88 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 53
- Nets
- 40
- Pads
- 217
- Tracks, vias
- 354, 1
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 13 Dec 2023
- Updated
- 6 Jan 2026
Overview
Pico hd mcu v2 is an open-source printed circuit board by ozgend, from the ozgend/hd-mcu repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 87.9 × 88 mm with 53 parts on 40 nets, routed with 354 tracks and 1 via.
It is built around the CD4051. It belongs with the sensors and measurement and radio and wireless boards and the RP2040 boards of this library.
Main components
1README
readme.mdhd-mcu
bluetooth supported mcu for harley davidson 99-03 with raspberry pi pico
this is not a ecu but a diy -and for fun- project for a monitoring hardware via an mcu since there is no can-bus support for 99-03 models. it replaces the default turn signal module (tsm) to provide monitoring features for battery voltage, rpm, voes, ignition, and external thermo sensors via bluetooth to the mobile application. it does not involve a reverse engineering for the original hd-tsm module.
- programmable idle timeout for turn signal
- pcb provides signal switching via h-bridge module or mosfet + oc
- built-in battery voltage sensor
- built-in rpm reader
- built-in temperature sensor via rpi-pico
- aux inputs for ignition and voes signals (may require custom ignition module ie. ultima/dyna 2000i)
- vehicle information with editable fields for maintenance records
- external 6x thermocpouler raiser for max6670
- supports up to 8x thermocpouler sensors for various purposes
features
- hardware serial
- raw ft232 usb serial
- bluetooth serial
- raw bluetooth serial (hc-06 @ 9600 bps)
- mobile app
- data polling/broadcasting
- reduced power consumption
- reduced cpu clock usage
- turn signal flasher module
- left/right turn signal flasher
- hazard flasher
- flash on startup
- adjustable flash rate
- throttle control module
- linear hall sensor input
- servo pwm output
- adjustable base parameters
- adjustable idle speed
- [ ]
- adjustable throttle curves
- supported sensor inputs
- multiplexed thermocouples
- up to 8 thermocouples
- direct sensor inputs
- uptime counter (onboard)
- mcu voltage (onboard)
- temperature (onboard)
- vbus input (onboard)
- battery voltage input
- rpm input
- speed input
- tpms
- 433mhz receiver implementation
- tpms decoder / man-i or man-ii (tbd)
- ignition module
- dyna 2000i / ultima 2000i timer & pickup
- programmable ignition advance
- advance curve
- temp compensation
- rpm compensation
- wideband o2 sensor for afr
- multiplexed thermocouples
software
mobile app
-
platform
react 18.2.0react-native: 0.73.2
-
react-native
- android
- ios
mobile app ui
mcu firmware
-
platform
nodejs: 20kaluma-cli: 1.4.0kalumajs runtime: 1.2.1
-
FLASH: 2044/24 kb
-
SRAM: 264 total, 184/62 kb
hardware
assembly
- 12v-5v buck converter / switching regulator
- raspberry pi pico
- hc-06 bluetooth module
TSM/ turn signal module- (option-1) - with mosfet extension board
- pick this if your rectifier is 3 pin and charge flux is 12v-15v
- IRF4905 datasheet
- (option-2) - l298n h-bridge driver module
- (option-1) - with mosfet extension board
THE/ thermocouple moduleTCM/ throttle control module- 5v super capacitor
- 5805 voltage regulator
- 33k resistor
- 10k resistor
- 7.5k resistor
- 4.7k resistor
- 1k resistor
- 1n4001 diode
pcb
front
back
blueprint
setup & building & installing
-
initialization
bash git clone npm run install -
cook everything
bash npm run build -
create mcu firmware
bash npm build:mcu -
flash firmware to pico
bash npm run flash:mcu -- /dev/tty.usbmodem2XXX -
create mobile app
-
create local build
bash npm run build:app -
create distributable bundle .apk
bash nom run bundle:app
-
usb serial interface
- usb:
115200 bps - bt:
9600 bps
service interaction
- query only:
[SVC]+[CMD]\n - set svc data:
[SVC]+[CMD]=[DATA]\n
service list:
| service | description |
|---|---|
SYS | mcu information system |
THE | thermocouple sensor module |
TSM | turn signal module |
TCM | throttle control module |
VHC | vehicle healthcheck module |
VHI | vehicle information system |
command list
| command | description |
|---|---|
INFO | get information from service |
DATA | get data from service |
SET | send data to service |
START | start monitoring |
STOP | stop monitoring |
TSM extended command set
| command | description |
|---|---|
LEFT | left turn signal |
RIGHT | right turn signal |
ALL | hazard signal |
NONE | turn signal off |
module interaction
- query only:
[MOD]+[CMD]\n
module list:
| name | description |
|---|---|
M0 | main mcu module |
command list
| command | description |
|---|---|
DIAG | execute diagnostic |
START | start ON_DEMAND services in module and publish data |
STOP | stop ON_DEMAND services in module and stop publishing data |
LIST_ALL | list all registered services in module |
LIST_RUN | list running/active services in module |
Parts
53| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | , , , , , , , , , , | ||
| 11 | N4 | Connector_PinHeader_2.54mm:Socker_PinHeader_1x05_P2.54mm_Dualside | 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5 |
| 10 | R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | ->, ->, 7K, 7K, 10K, 10K, R1K, R1K, R1K, R2K |
| 2 | N1 | Connector_PinHeader_2.54mm:Socker_PinHeader_1x05_P2.54mm_Dualside | 1, 1 |
| 2 | PinSocket_1x03_P2.54mm_Vertical | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | LSIG 7805, RSIG 7805 |
| 1 | clipboard:025a530c-414d-4610-914f-198754de7740 | ||
| 1 | CD4051 | Package_DIP:DIP-16_W7.62mm_LongPads | CD4051 |
| 1 | N6 | Connector_PinHeader_2.54mm:Socker_PinHeader_1x05_P2.54mm_Dualside | 6 |
| 1 | N7 | Connector_PinHeader_2.54mm:Socker_PinHeader_1x05_P2.54mm_Dualside | 7 |
| 1 | N8 | Connector_PinHeader_2.54mm:Socker_PinHeader_1x05_P2.54mm_Dualside | 8 |
The 41 most common of 53 parts.
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Questions
How big is the Pico hd mcu v2 PCB?
It measures 87.9 × 88 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Pico hd mcu v2 use?
53 parts, built around the CD4051. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Pico hd mcu v2 KiCad files?
From the ozgend/hd-mcu repository on GitHub, at the commit this page was made from: the board is pcb/pico-hd-mcu-v2/pico-hd-mcu-v2.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pico hd mcu v2 design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).