Author Topic: disable/enable ULN2003 using transistor? (Read 2194 times)

bletze · « **on:** December 30, 2009, 01:13:01 AM »

im using ULN2003 for relays then nid kong idisable ang relay pag 0 na ung time. magastos nmn at mahirap sa pag design kung lalagyan ko ng tig-iisang AND gate ung bawat input para sa ULN2003..
kya ang tanong ko po is kung pede ko ba sya ma enable/disable with transistor? what transistor type? ska saang pins ko po xa ilalagay?

tama po ba itong ginawa ko?? nid your suggestions..

Philippine Electronics Forum · « **on:** December 30, 2009, 01:13:01 AM »

insomartin · « **Reply #1 on:** December 30, 2009, 02:12:33 AM »

bakit mo kailangan i disable/enable.. kung sa input pa lang eh pwede mo na macontrol?

Philippine Electronics Forum · « **Reply #1 on:** December 30, 2009, 02:12:33 AM »

bletze · « **Reply #2 on:** December 31, 2009, 02:16:15 PM »

sa pagcontrol po ng charger ko gagamitin.. ung mga input nya galing sa PIC..
nakadepende po kc sa time ska sa selected charger ung pag activate ng relay..
bale ganito po ung diagram..
tanong ko lng kung tama o my iba pang magandang gawin..

Philippine Electronics Forum · « **Reply #2 on:** December 31, 2009, 02:16:15 PM »

insomartin · « **Reply #3 on:** December 31, 2009, 02:18:25 PM »

sa software kna timer off gamit ka na lang nang real time clock.. mamaya ipopost ko yung tutorial ko. wait lang. maganda kasi yun sa ganyang application.

Philippine Electronics Forum · « **Reply #3 on:** December 31, 2009, 02:18:25 PM »

Mayalin22 · « **Reply #4 on:** December 31, 2009, 02:20:51 PM »

mas maganda sis software control na lang kc me Micro ka na... sayang naman kung hindi mo i-maximize gamit ng micro.

Philippine Electronics Forum · « **Reply #4 on:** December 31, 2009, 02:20:51 PM »

0b00000111 · « **Reply #5 on:** December 31, 2009, 02:23:14 PM »

sa software mo na lang siguro gawin para less cost, tutal controlled naman ng PIC.

bletze · « **Reply #6 on:** December 31, 2009, 02:56:20 PM »

maganda po sana ung sa software control kso ang problem hiwalay ung pic nung selector at nung timer.. at gamit na po ung lahat ng I/O ports kya ndi ko na maisingit kung paano makakabit ung pin galing sa timer papuntang selector..

kya sa harware na lng ako naghahanap ng paraan.. BTW hindi lng po pla time dependent ung pag disable/enable nung ULN2003 pede rin syang i stop and start ng user..

insomartin · « **Reply #7 on:** December 31, 2009, 03:05:11 PM »

anong pic po gamit nyo?

bletze · « **Reply #8 on:** December 31, 2009, 03:17:22 PM »

pic16f84a ska pic16f877a..
pic16f84a - sa timer circuit
pic16f877a - keypad ska selector circuit..

insomartin · « **Reply #9 on:** December 31, 2009, 03:20:12 PM »

pwede na tangalin yung pic16f84a
ok na yung 877... kaya nya na yung timer functions.

bletze · « **Reply #10 on:** December 31, 2009, 03:35:19 PM »

sakto lang po ung mga ports para sa pic eh dami kcng iseselect na charger type mga 11 po.. kya yung pagcontrol na lng tlga ng nung ULN2003 using transistor ung option ko..

Mayalin22 · « **Reply #11 on:** December 31, 2009, 03:48:33 PM »

di mo na kelangan ng additional ports pag software controlled ang mga relay.. tama si sir martin 877 will do the job.

Set the timer
Select type of phone
enable the relay
run the timer
check timer
if timer = xx then
disable the relay

EDIT: if you can post sana the circuit.

bletze · « **Reply #12 on:** December 31, 2009, 04:10:37 PM »

ung timer po kc nakakabit sa coin slot tpos seven segment start at stop push button..
try ko po ibigay ung diagrams mamaya magulo kc ung gawa ko eh..
natapos ko nrin kc gawan ng design ung ibang circuit kya sa pagcontrol using transistor na lng tlga ako umaasa..

Philippine Electronics Forum · « **Reply #12 on:** December 31, 2009, 04:10:37 PM »

Philippine Electronics Forum