line follower mobot

[ΔЅịMø]

mga sir and mam.. i've made a mobot poh kya lang may problem ung h-bridge nya.. ayaw poh mag-backward ang left.. nu poh kya possible na sira mga sir?  i have used 8050 and C945 transistors...

[tiktak]

8050 and C945 are both NPN, kung mapapansin mo NPN/PNP combination ang circuit nung h-bridge na posted dito, can you show your schematic? 

[lloydi12345]

Ito ang complete circuit.

panu po ung connection nito sa L293d H-Bridge mga sir? or pde rin po ba mapaikot ung motor sa ULN 2003A? saan po ako mkakamura if I'm controlling it with pic16f84a?

[ΔЅịMø]

okay na poh xa sir...  salamat poh... baliktad lang poh ung location nang mga transistor... ^_^

[mini_mouse ^_^]

...ok na po lahat, sensor ko po at hbridge... ok na rin po yung LED na representation ko po sa output para sa movement ng motor.. the problem is mahina po yung rotation ng motor kapag nasafloor po xa... pero pag-inangat ko po, ok naman po... sometimes, kaylangan mo munang iturn2 yung wheels para mgrotate xa... this status was after i assemble all the mobot parts po... complete mobot na po xa... kaya nga lng po, ganun,, mahina po yung pgturn ng wheels kapag nakapatong xa... if pure Hbridge lng po at motor at yung trigger po is from Vcc lng, mabilis namn po yung turns... but if ang trigger po is from the output Pins of PIC, yun yung problem... hindi po tumatakbo ang mobot... maliit lng po kasi yung Vout ko from comparator... 3.9 V po... at yung Vout sa pic sobra lng po sa 3V... ano po ba ang problem? is it the battery na gamit ko? low class lng po kasi yung.. 12Pesos na 9V..

[mini_mouse ^_^]

pahelp po mgPWM sa assembly.. here's my code:

list      p=16F84A            ; list directive to define processor
   #include <p16F84A.inc>        ; processor specific variable definitions

   __CONFIG   _CP_OFF & _WDT_ON & _PWRTE_ON & _RC_OSC

; '__CONFIG' directive is used to embed configuration data within .asm file.
; The lables following the directive are located in the respective .inc file.
; See respective data sheet for additional information on configuration word.




;***** VARIABLE DEFINITIONS
w_temp        EQU     0x0C        ; variable used for context saving
status_temp   EQU     0x0D        ; variable used for context saving
cblock 0x10
step1, step2,prev_state
endc


;RA0= right sensor
;RA1=Mid sensor
;Ra2=Left sensor
;Ra3=ON Button

;RB4=Forward
;RB5=Backward -------------pwde na wala na
;RB6=turn right
;RB7=turn left



;**********************************************************************
      ORG     0x000             ; processor reset vector
        goto    main              ; go to beginning of program


      ORG     0x004             ; interrupt vector location
      movwf   w_temp            ; save off current W register contents
      movf   STATUS,w          ; move status register into W register
      movwf   status_temp       ; save off contents of STATUS register


; isr code can go here or be located as a call subroutine elsewhere


      movf    status_temp,w     ; retrieve copy of STATUS register
   
      movwf   STATUS            ; restore pre-isr STATUS register contents
      swapf   w_temp,f
      swapf   w_temp,w          ; restore pre-isr W register contents
      retfie                    ; return from interrupt

delay_norm
   movlw .125
   movwf step1
s1  movlw .125
   movwf step2
s2
   decfsz step2
   goto s2
   decfsz step1
   goto s1
   return



main

movlw b'00001111'
tris porta
movlw b'00000000'
tris portb

clrf porta
clrf portb

sta
btfsc porta,3   
goto sta
una
   btfsc porta,0
   goto test_porta100
   btfsc porta,1
   goto test_porta200
   btfsc porta,2
   goto frwdryt_motor         ;forward-ryt
   goto frwd_motor            ;forward

test_porta100
   btfsc porta,1
   goto test_porta201
   goto test_porta202

test_porta200
   btfsc porta,2
   goto frwdryt_motor         ;forward-ryt
   goto f_prevcmd            ;follow prev_command

test_porta201
   btfsc porta,2
   goto f_prevcmd            ;follow prev_cmd
   goto frwdleft_motor         ;forward left

test_porta202
   btfsc porta,2
   goto frwd_motor            ;forward
   goto frwdleft_motor         ;forward-left

frwd_motor                  ;forward
   bcf portb,7               ;off front motor
   bcf portb,6               ;off front motor
   bcf portb,5               ;logic 0 to 4ward back motor   (-)
   bsf portb,4               ; logic 1 to 4ward  back motor   (+)
call delay_norm                                    ;I just put delay b turning off back motor
   bcf portb,4
call delay_norm                                 ;I just put delay b turning on back motor
   bsf portb,4

   movf portb,w            ; save status of portb to w

   movwf prev_state         ;store value of w to prev_state
   goto una

frwdryt_motor               ;forward ryt
   bcf portb,7               ;logic 0 to turn ryt front motor
   bsf portb,6               ;logic 1 to turn ryt front motor
   bcf portb,5               ;logic 0 to 4ward back motor   (-)
   bsf portb,4               ; logic 1 to 4ward  back motor (+)
   call delay_norm                               ;I just put delay b turning off back motor
   bcf portb,4
   call delay_norm                              ;I just put delay b turning on back motor
   bsf portb,4
   movf portb,w            ; save status of portb to w
   movwf prev_state         ;store value of w to prev_state
   goto una

frwdleft_motor               ;forward left
   bsf portb,7               ;logic 1 to turn left front motor
   bcf portb,6               ;logic 0 to turn left front motor
   bcf portb,5               ;logic 0 to 4ward back motor   (-)
   bsf portb,4               ; logic 1 to 4ward  back motor (+)
   call delay_norm                            ;I just put delay b turning off back motor
   bcf portb,4
   call delay_norm                           ; I just put delay b turning on back motor
   bsf portb,4
   movf portb,w            ; save status of portb to w
   movwf prev_state         ;store value of w to prev_state
   goto una

f_prevcmd                  ;follow prev_cmd
   movf prev_state,w         ;move the value of prev_state to w
   movwf portb               ;move value of w to portb
   goto una

      END                     ; directive 'end of program'

[cristanboj]

ask ko lang . pde ba aku gumamit ng L293D para poh hindi na aku ggamit ng H-bridge as

what has already displayed earilier.? pa help nman po if kung gagamit aku ng :293D anu na

poh ang magiging schematic ko?

[tiktak]

The L293D is a h-bridge, its just in a single IC package

[RaffT]

pa help nman po if kung gagamit aku ng :293D anu na

poh ang magiging schematic ko?

you can read the datasheet for that L293D for connections/schematic/wiring

[riskbreaker]

Can someone please help me programming my line follower?
This is the diagram

http://mobots.solarbotics.net/images/myrobots/dizzy/Dizzy_full.GIF

I'm using Pic16F84a, MPLAB (Assembly Language)

Please/ I really need help. Thank you!

[OPTIMUS PRIME]

Sa DILDO wars maraming DILDO boys may alam dyan try to visit the thread and know whos who to ask..

[blitzers00]

mga sir!

ung bang servo motor is parang h-bridge lng? o tlagang magkaiba sila? hehe.. ndi ko po kase alam

salamat !

[LTSGü]

@blitzers00
yung servo motor po ay MOTOR na may feedback circuitry at mga gearings sa loob... hindi na kailangan nito ng motor driver.. supply lang tsaka controlling signal para gumana siya...

yung H-bridge po ay motor driver commonly used sa mga simple dc motors katulad nung sa tamiya.. XD





--------------------
Google is your friend.

[leslie019]

ay grabe.. ang haba nito.. hahaha! malaking tulong toh para makabuo kami ng sarili naming line follower.. )

[blitzers00]

may matindi po akong tanong! nung nag program po ako gamit ko ung codes na pang sensor para pagalawin ung servo.. ng in'on ko na ung emulator ang default po ng servo ay nka full clockwise xa.. kpag ung isang sensor ay nka sense mag counter clockwise xa at kpag tinangal ko bumabalik sa full clockwise! haha kpag ung isang sensor naman ay nka sense walang nangyayari, dun pa din xa sa full clockwise! bket po kaya ganun? kase kpag pushbutton lng ang gamit ko na nsa breadboard ok xa! as in ok tlaga.. pero ng gamitan ko na ng sensor medyo may palya HELP!


SALAMAT PO!

[tiktak]

post nyo po codes nyo para mas madali kayo matulungan

[OPTIMUS PRIME]

push button will have a logic high at full 5V logic low at full 0V..pag sensor pede di umabot sa logic high or low. Try to check the logic high and low na voltage. Diko maalala kung 2.5V start ng high logic at 0.5V below ang low logic.

Pede tama ang code pero yung logic voltage hindi

[leslie019]

sino po marunong gumamit nung 2-Ch DC Motor Driver Kit ng egizmo? )

[OPTIMUS PRIME]

phase1   VAR PORTA.0            
enable1  VAR PORTA.1
phase2   VAR PORTA.2
enable2  var PORTA.3

Yan ang pin assignments ko. try download the datasheet ng universal programmable controller sa e-gizmo site + datasheet ng H-bridge used.

Analyze it ng maintindihan mo bakit ganyan ang assignment ko

http://www.e-gizmo.com/KIT/Robotc.HTM

[leslie019]

mga boss.. bago po ung h-bridge na labas ng gizmo eh.. iba po histura dun sa luma.. panoh ba ung sa bago? :| sabi kasi nung isang technician sa gizmo nndun dw s cd n bnigay nla ksma s kit ung instructions kng pnoh gmitin ung kit n un..kso schematic diagram lng ska pcb layout po ung nakita ko dun s cd eh