Author Topic: CAR PARK COUNTER (Read 4263 times)

ricandrea · « **on:** November 28, 2009, 08:31:01 PM »

Mga ma'am and mga sir... patulong po sana ako kung ano magandang circuit para sa isang car park counter na nag count up kung may papasok na car and count down kung may aalis na car?
ayaw ko po kasi sana gumamit ng PIC.... ano po kaya ang available na IC na may parehong up and down pins? salamat po..

Philippine Electronics Forum · « **on:** November 28, 2009, 08:31:01 PM »

Kaizer03 · « **Reply #1 on:** November 28, 2009, 08:34:14 PM »

Quote from: ricandrea on November 28, 2009, 08:31:01 PM

Mga ma'am and mga sir... patulong po sana ako kung ano magandang circuit para sa isang car park counter na nag count up kung may papasok na car and count down kung may aalis na car?
ayaw ko po kasi sana gumamit ng PIC.... ano po kaya ang available na IC na may parehong up and down pins? salamat po..

use an Ultrasonic Sensor =) then a 74192 UP/down counter=)

Philippine Electronics Forum · « **Reply #1 on:** November 28, 2009, 08:34:14 PM »

ultrasonic™ · « **Reply #2 on:** November 28, 2009, 10:20:02 PM »

Quote from: -[kaizer]^[gigz09]- on November 28, 2009, 08:34:14 PM

use an Ultrasonic Sensor =) then a 74192 UP/down counter=)

agreed mas madali pah... (^_^),V,,

Philippine Electronics Forum · « **Reply #2 on:** November 28, 2009, 10:20:02 PM »

Kaizer03 · « **Reply #3 on:** November 28, 2009, 10:32:37 PM »

^

heheh

@TS, yan na ang key parts na kailangan mo..

sa ultrasonic sensor.. mostly may kasama ng ckt sa datasheet nya.. may OPAMP din AFAIK

,, tapos you have to analyze its output.. then a ckt para magpulse sa 74192 mo...

then gates na lang para sa in and out ng car.. syempre you have to make 3 or more of this sensor module para matest mo ng maigi ang count up and down =)

Philippine Electronics Forum · « **Reply #3 on:** November 28, 2009, 10:32:37 PM »

rdpzycho · « **Reply #4 on:** November 28, 2009, 10:55:40 PM »

pwedeng 2 phototransistor at focused light. typically spaced around 2/3 size ng kotse to verify na kotse nga 'yung dumaan. pwede na ring makuha 'yung direction ng kotse though mostly ang parking may entrance at exit.

Philippine Electronics Forum · « **Reply #4 on:** November 28, 2009, 10:55:40 PM »

Kaizer03 · « **Reply #5 on:** November 28, 2009, 11:18:35 PM »

Quote from: rdpzycho on November 28, 2009, 10:55:40 PM

pwedeng 2 phototransistor at focused light. typically spaced around 2/3 size ng kotse to verify na kotse nga 'yung dumaan. pwede na ring makuha 'yung direction ng kotse though mostly ang parking may entrance at exit.

ayan ang tipid mode.. but you have to align it=) or else sablay=) thesis ba ito?

insomartin · « **Reply #6 on:** November 29, 2009, 07:35:06 AM »

id use IR... madaming loko loko jan baka kapag nalaman nila na light controlled eh magdala nang flashlight at dayain nila, ambient light also plays a crucial role sa mga phototransistors. no need to align too malaki yung margin kasi wide naman yung transmission... parang remote control nang TV.

so ir naman option ko.

pwede din yung magnetic sensor. kapag may malaking changes sa magnetic field magtritriger sya may kamahalan pero another option lang naman ito.

ricandrea · « **Reply #7 on:** November 29, 2009, 07:02:17 PM »

tnx sa mga suggestions nyo.... gagwa lng naman ako ng miniature carpark so ok lng kahit 1 digit counter lng...project po ito sa skul....
curious lng po ako panu gamitin yung 74192...hndi na ba need ang j-k flip flop d2? tnx po ulit

carlsfootprints · « **Reply #8 on:** November 30, 2009, 12:28:40 AM »

hindi na kelangan ng flipflop.. you can check the datasheet of 74192 as your guide..

nadali ako nun sa counter(miniature carpark din) na ganito.. 74190 naman ginamit ko.. mali ung count.. un pala.. switch bounce ung problem.. hehe.. late ko na nalaman ung debouncing circuit..

with the sensor, i vote for the ir pair.. hehe.. since limited lang ang kaalaman ko nun, ldr ang ginamit ko.. haha.. with superbright LED.. ayun.. switch bounce + ambient light = disaster

rdpzycho · « **Reply #9 on:** December 01, 2009, 01:17:35 AM »

kapag visible light ang ginagamit linalagyan ng modulation para 'di babasahin 'yung ambient. 'di na 'to pwede sa system using purely logic gates (unless ok lang lumaki

)

ricandrea · « **Reply #10 on:** December 03, 2009, 07:51:00 PM »

carlfootprints pwede po ba makita yung schematic na ginawa mo dati para magkaroon lng ako ng idea?

gumawa ako gamit 74192 pero hndi gumagana...ewan ko kung bakit...sa multisim ko muna xa ni run..wlang output eh....waaaa

carlsfootprints · « **Reply #11 on:** December 03, 2009, 10:23:21 PM »

ganun ba.. sa proteus ka na lang mga simulate

anyways, eto ung circuit

palitan mo lang ung switch sa kung anong sensor ung gagamitin nyo..

nagwowork ung circuit na yan.. actually, nakapcb pa rin yan hanggang ngaun

ricandrea · « **Reply #12 on:** December 06, 2009, 12:24:30 PM »

panu po yung sa switch? yung isang switch ang function nya is reset.... tpos yung isa either up or down?
ang gus2 ko kasi sana yung isang switch is for count up tpos yung isang switch ay para sa count down...
panu ko po kaya ggawin un?

Mayalin22 · « **Reply #13 on:** December 06, 2009, 12:30:17 PM »

yung sw1 yun ang pulse input (Counter)
yung sw2 kung up or down ang count.

carlsfootprints · « **Reply #14 on:** December 06, 2009, 03:13:00 PM »

kung iswiswitch mo na lang at di kana gagamit ng sensor.. pwede naman.. 1st switch for the count(input pulse) only.. ung 2nd switch for the count(input pulse) and for the up/down switch..

pakicheck sa datasheet kung kelan nagcocount up or down.. posedge ba or negegde

..

gets mo ba? hehe.. bale ung SW1 sa diagram ay connected sa pin14.. tapos ung SW2 ay connected sa pin14 at sa dalawang pin5..

di ko lang alam kung magwowork ung ganun.. try mo na lang muna

ricandrea · « **Reply #15 on:** December 07, 2009, 07:43:44 PM »

cge try ko po muna gawin...try ko gamit ng 74192 ic kasi may up and down pins un...

carlsfootprints · « **Reply #16 on:** December 07, 2009, 10:54:41 PM »

ok din kahit un gamitin mo.. goodluck

ricandrea · « **Reply #17 on:** December 13, 2009, 06:55:48 PM »

waaaa...bkit ganun..ayaw gumana ng counter ko....

clare · « **Reply #18 on:** December 13, 2009, 07:34:40 PM »

baka ung sa up and down pin mo hehehe kasi ung up and down counter dpat naka logic 1 lagi kpg ndi ginagamit.. para magcount ung pin (up or down pin) kunga gagamitin mo ung up count dapat ung pin para sa down count eh naka high hehe... sana makatulong my ganyan din kasi akong project dati scoring naman ayaw din mag count dati... galingan mo sa paggawa ^_^...

RaffT · « **Reply #19 on:** December 13, 2009, 07:46:04 PM »

Quote from: ricandrea on December 13, 2009, 06:55:48 PM

waaaa...bkit ganun..ayaw gumana ng counter ko....

tingnan mo datasheet ng ic gamit nyo.. baka may enable pin pa yun.. tingnan mo rin if positive or gnd triggered ang clock input mo..

Philippine Electronics Forum · « **Reply #19 on:** December 13, 2009, 07:46:04 PM »

Author Topic: CAR PARK COUNTER (Read 4263 times)

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