Guru
Joined: 02/02/2017
Location: AustraliaPosts: 1483
| Posted: 11:08pm 12 Oct 2022 |
here is the code I use for the ebike charger.
As usual, PWM is on pin D9
I have a potentiometer for setting output voltage and a pot for setting max output current.
The code will drive a serial LCD (20x4) and show
the input volts and thermistor temporature (I put it on the heatsink)
the set Volts and amps, the measured volts and amps and a Watt.hour total
of the charge.
Reading the code will show which analog inputs are what.
D4 is the 9600 baud output going to one of my "serial" LCDs
I played with PID control for a while but I use the simple bang/bang control.
PID is used with the charge regulator I made for my Ducati 900
and it runs similar code but not this.
Put good RC low pass filters on all analog inputs and locate them close to the
Nano's pins.
Pin D5 is used to drive a heatsink fan motor. I have it set to run
when over 60 C is reached. Use a 10K NTC thermistor
You will need to determine the calibration factors yourself.
ps1-v3.zip