Arduino project to add power window control to 'old' car
Electronic control for vehicle originally with manual window winders, and motorised actuators retrofitted.
My requirement is for 2 door ute (well this isn't mine - but close -oneday). So require 4 relays, 2 up/down switches required.
See proposed schematic.
Proposed schema:
Mount 2 switches on centre console and arduino and 4 relay board and current sense boards nearby and run 1 pair wires
carrying drive current to each door.
Momentarially operating a Left or Right switch (or both) should drive in the correct direction until either.
The winding is
1. Halted by user ie momentary action of (either up or down) switch
2. Window reaches maximum travel and halts due to measured current being above set point. ie the electric motor stalls (I'm working on approx 5-10A, will need to test)
3. Timed-out after a fixed period. (For circumstance where window is slow but not tripping overcurrent)
Holding switch operated should
1. Not block operation of other user
2. Operate window winding in desired direction until either
a. Timeout occurs
b. User releases switch
c. Current sense detects end of travel
References:
https://www.youtube.com/watch?v=-DV6hUSxZSk Arduino power Window control conversion
https://www.youtube.com/watch?v=lisprJs5sNU Using ACS712 Hall effect current sensor
Formula for using ACS712
source: forum.arduino.cc/index.php?topic=143265.0
float a =((float) sensorValue / 512.0 - 1.0) * 2.5 / 2 * 20;
Somewhere else... This is what I'm going to try first. Where
maxAnalog = 1024 // Analog IP range 0-1023
maxmVDC = 5000 // DC voltage 0-5V
ACSoffset = 2500 // Nominal voltage with zero current (2.5V)
mvperAmp = 100 // mV Out per Amp in. 185 for 5A, 100 for 20A, and 66 for 30A Module
Amps = (((analogRead(Ax)/maxAnalog)*maxmVDC)-ACSoffset)/mvperAmp
4 relay board https://www.aliexpress.com/item/32905958885.html?spm=a2g0s.9042311.0.0.27424c4dgulU3c
current sensor https://www.aliexpress.com/item/4000205887443.html?spm=a2g0s.9042311.0.0.19764c4dDLUdVT
lawabb@gmail.com
Version 0.2 - Rewrite to not require interrupts. Have no current sense hardware as yet.. no tested code for it yet.
Version 0.3 - Have no current sense hardware as yet, but code for it added untested.
TODO - code for remote operation
TODO - refactor code... there is plenty of code duplication
Version 0.4 - Have added 'PW' class to simplify code maintenance/changes and reduce duplication
Version 0.5 Changes to SENSOR - not tested with hardware
Version 0.6 Debugging aids added
Version 0.8 Tested with components on PCB - one side only - not in car. All working. Max current to be checked in vehicle so not exceed 20A
End of travel flags added to help prevent retrying winding when already at end of travel