LED PWM Controller for camping van, PIC12F1572

For use with 12V lead battery, but 24v is also possible if voltages divisiors is adapted.

• 50W power, 15V max (or more if you change voltage divisor)
• UART controlled
• High frequency PWM (26khz), no audible noise and no flickering
• No Off current (potentiometer Mechanical switch)
• Low level battery monitornig ( Cutoff<=10.25V, 7%PWM Max<=11V, Normal>=11.5V)
• Simple Connector, 6.35 terminals
• OverCurrent protection

Schematics here...

Main parts are :

• PIC12F1572-E/MS Microcontroller (MSOP version)
• TE 17PCSA103MC19P Potentiometer with switch
• AP7383-33Y-13 Voltage Regulator
• RUEF500 PPTC Current protector
• NVD5C486NLT4G MOSFET N
• TE 63951-1, 6.35 connector

STL 3D printed Housing provided in HW folder

UART has priority. To return to the potentiometer control, stop sending UARTs frames and turn the potentiometer a bit.

UART HW is 2 pin 2mm JST connector with RX only and GND, 3V3, 9600B, 8n1

1. B1 = 0xCA
2. B2 = 0xFE
3. B3 = ADDR (currently define by preprocessor) or BrdCast (0xFF)
4. B4 = LedMSB
5. B5 = LedLSB
6. CHK=B1+B2+B3+B4+B5 (8bit)

Compiler : XC8 2.10 IDE : MPLAB X V5.35 Programmer : Microchip PICKIT3