Recommendations - Model Train Controller

[mister_e]

as long as the POT impedance meet the maximum recommended.. it shouldn't be much of a problem.

What happen to your supply when you plug your loco directly?

Now, If you add 1 or more?

Now do the same but add your transistor to drive them.. what happen?

i got my few motor here, i'll do some test later.

[mister_e]

Well well well... running 3 different Motor type from 500mA to 10A @12Vdc.. and a pretty messed up breadboard + Jumper it works

2 channel PWM... all square...

3 pwm ... still the same, life is good

BUT... when you add ADCIN 4, DutyVar4... somethings goes bad....

Do one test with anything matched with ADCIN 4... something go really bad... where it comes from... i don't know for now.

Same thing happen if you do something with DutyVar4...

scratch scratch scratch

[mister_e]

Everything just fine using...

@ __CONFIG  _HS_OSC & _WDT_ON & _PWRTE_ON & _MCLRE_OFF 


ANSEL = %00010111    ; - dt suggested value



DEFINE OSC 20
CMCON=7
TRISA=%11111111        'set PORTA as all input 
TRISC=%00000001        'set PORTC as all output apart from RC0

DEFINE ADC_BITS  8     ' ADCIN resolution  (Bits)
DEFINE ADC_CLOCK 2     ' ADC clock source  (Fosc/32)
DEFINE ADC_SAMPLEUS 11 ' ADC sampling time (uSec)

INCLUDE "DT_INTS-14.bas"            ; Base Interrupt System
INCLUDE "SPWM_INT.bas"              ; Software PWM module

DEFINE SPWM_FREQ  150                ; SPWM Frequency
DEFINE SPWM_RES   255               ; SPWM Resolution

DutyVar VAR byte[4]

ASM
SPWM_LIST  macro                    ; Define Pin's to use for SPWM
    SPWM_PIN  PORTC, 2, _DutyVar   ; and the associated DutyCycle variables
    SPWM_PIN  PORTC, 5, _DutyVar+1   ; Notice the underscore before variables
    SPWM_PIN  PORTC, 4, _DutyVar+2
    SPWM_PIN  PORTC, 3, _DutyVar+3
  endm
  SPWM_INIT  SPWM_LIST              ; Initialize the Pins
ENDASM

ASM
INT_LIST  macro    ; IntSource,        Label,  Type, ResetFlag?
        INT_Handler   TMR1_INT,  SPWMhandler,  ASM,  yes
    endm
    INT_CREATE                      ; Creates the interrupt processor
ENDASM

@ INT_ENABLE  TMR1_INT              ; enable Timer 1 interrupts

;_____________________________________________________________________________

Main:                               
 ADCIN 0, DUTYVAR[0]
 ADCIN 1, DUTYVAR[1]
 ADCIN 2, DUTYVAR[2]
 ADCIN 4, DUTYVAR[3] 
 GOTO Main

GO GO GO FIGURE IT