LED-Relay

Public

Loading files…

README

LED Relay Replacement PCB

This board was designed to act as a relay for multi-color strip LED lighting on my wife's Harley Tri Glide. The Infineon BTS7008 Dual High-Side Switch provides up to 7.5A per channel. The software allows a quick on-off-on sequence that keeps the LEDs lit after the trike is turned off for a programmable delay time in minutes. In addition to the Stay ON sequence the board also allows programming the amount of time to delay time. Set main.c for instructions on how to issue Stay ON sequence.

There are 4 inputs to the LED Relay board:

+12V - This should be connected through a fuse to the battery and should remain hot even when the trike is off. All power to the outputs comes from this wire.
ACC1 - This is +12V when the bike is turned on (ignition).
ACC2 - This is +12V when the LED lights should be on.
GND - Chassis and negative terminal of the battery. The current software turns both outputs on when both ACC1 and ACC2 are at +12V but this can easily be changed to two independent outputs each controlled by its own ACC input. When either ACC1 off the micro-controller enters a low power state waiting for ACC1 to go back to +12V. Note with my current setup ACC2 can never go to +12V without ACC1 also going to +12V.

Status and Testing

Rev 2.2 PCB has not been ordered or tested. Since there is only one simple change and my Rev 2.1 was modified to Rev 2.2 I feel confident Rev 2.2 is ready for use.
- Added ACC1 connection to PD2 on micro-controller. Only PIN2 has full asynchronous edge detection needed for ACC1.
- You can order parts from Mouser using this shared BOM. Note LT3014 is not available at Mouser you must get it somewhere else like Digikey.
- You can order the PCB from OSH Park using this link to OSH Park.
Rev 2.1 PCB has been ordered from OSH Park, assembled, and tested.
- Added R12 and R13.
- Moved ACC connections on micro-controller.
- Testing complete after modifying to Rev 2.2.
Rev 2.0 PCB.
- Converted older design to KiCad.
- Switched from low-side switch to dual high-side switch.
Rev 1.0 Existed as another design that was close.

Board Preview

Comments

LED Relay Replacement PCB

There are 4 inputs to the LED Relay board:

+12V - This should be connected through a fuse to the battery and should remain hot even when the trike is off. All power to the outputs comes from this wire.

ACC1 - This is +12V when the bike is turned on (ignition).

ACC2 - This is +12V when the LED lights should be on.

GND - Chassis and negative terminal of the battery. The current software turns both outputs on when both ACC1 and ACC2 are at +12V but this can easily be changed to two independent outputs each controlled by its own ACC input. When either ACC1 off the micro-controller enters a low power state waiting for ACC1 to go back to +12V. Note with my current setup ACC2 can never go to +12V without ACC1 also going to +12V.

Status and Testing

Rev 2.2 PCB has not been ordered or tested. Since there is only one simple change and my Rev 2.1 was modified to Rev 2.2 I feel confident Rev 2.2 is ready for use.

Added ACC1 connection to PD2 on micro-controller. Only PIN2 has full asynchronous edge detection needed for ACC1.
You can order parts from Mouser using this shared BOM. Note LT3014 is not available at Mouser you must get it somewhere else like Digikey.
You can order the PCB from OSH Park using this link to OSH Park.

Rev 2.1 PCB has been ordered from OSH Park, assembled, and tested.

Added R12 and R13.
Moved ACC connections on micro-controller.
Testing complete after modifying to Rev 2.2.

Rev 2.0 PCB.

Converted older design to KiCad.
Switched from low-side switch to dual high-side switch.

Rev 1.0 Existed as another design that was close.

Board Preview

LED-Relay

Share LED-Relay

LED Relay Replacement PCB

Status and Testing

Board Preview

Contact us

Sign in to BoardRepo

LED Relay Replacement PCB

Status and Testing

Board Preview

Notes

Software

Protection Against the Elements

Final Result