JEEP_Aux_Control
Control for aux accessories like additional lighting using a touchscreen control.
Goal
I am creating an open source solution to controlling additional electronic components such as lights.
Conditions:
- Must be stand alone, not connecting to existing systems of the Jeep.
- Easy to customize
- Low Cost
- All documents available for anyone to use (code, PCB files, GRB files)
- Allow others to add to the documentation for functionality and defects
MCU Code
Code uses Ardiuno code for ease of use. Jeep_AUX_Control.ino.ino
Touchscreen Code
Since using Nextion screen, UI code uses Nextion Editor Software - Free and easy to use.
Power Circuit code
Code for power circuit using ATTiny85 - attiny85powerlogicv0.1.ino
Power Circuit Theory of Operations
12V constant and 12V switched (identified as ignition in this document) comes into the circuit. These are regulated down to 5V constant, 5V ignition, and 5V Ignition w/Delay off.
ATTiny85 is used to control 5V Ignition w/Delay by monitoring 5V Ignition into digital pin 0. When digital pin 0 goes low, the chip sees this as ignition is off and then runs a delay and then sets digital pin 1 to low, which is the output that controls a transistor as a switch for the 5V Ignition w/Delay.
ATTiny85 Pinout Pin4 = GND Pin5= Digital Pin 0 = Input from 5V ignition Pin6= Digital Pin 1 = Output to control transistor for delayed 5V ignition Pin8= VCC (5V Constant)
Theory of Operations for ATTiny85 Code
Digital Pin0 = input Digital Pin1 = output = init high
While pin0 is low then pin1==LOW
PCB
PCB files made in Eagle CAD. Include ready to print files for https://jlcpcb.com/
Power Circuit PCB - power reg 5v_2019-04-10.zip
Control PCB JEEP_Aux_Control_PCB.brd and JEEP_Aux_Control_PCB.sch JEEP_Aux_Control_PCB_2020-09-06.zip is the complete cam output to send to PCB house for production
BOM
BOM along with sources for parts
Control Board BOM https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=32fda13301
Power Board BOM https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=7aa37e28ff
3D models
Github file location:
https://github.com/mcartmill/JEEP_Aux_Control
Youtube videos