Discussion in "Project Help" started by    kks    Mar 1, 2018.
Sun Mar 04 2018, 09:54 PM
#11



😔 Guess you are right. Isn't there any other way in which i can run the motor?

kks


As this is an academic project, do you really need a motor ?
Can you use another way to indicate a door being unlocked.. say an LED ?

Getting a motor to go one way then the other is quite difficult.
You can use relays,but I assume you don't have any.
The L293 chip is the simplest way.

How much current does your motor draw ?



ExperimenterUK


Actually i was thinking about converting the project into a Society Car parking system. So a door opening and closing would look better than just an led. The motor is the one used in toys and stuff. Can't be more than 5v.
Sun Mar 04 2018, 11:35 PM
#12
" The motor is the one used in toys and stuff.
Can't be more than 5v."

In that case connect the + and - connections on the new board
to 5 volts and ground. No 12 volts anywhere.

Your driver board is limited to 600 milliamps (just over half an amp).
A toy motor could exceed that, but should be okay.
Use as small a motor as possible.

You could use relays, which survive mistakes, and handle
bigger motors, but will be more complicated.


[ Edited Sun Mar 04 2018, 11:36 PM ]
Mon Mar 05 2018, 01:20 AM
#13
I don't have a new board. And there is Vcc and + and - pins. On supplying 5v to all three pins and Gnd to Gnd, the programming board's led lights up but not the display. I suppose i may have damaged it when i first gave 12v to Vcc before. I guess now i will either have to buy a new l293d board or just use leds as you mentioned.
Thu Mar 08 2018, 03:53 PM
#14
Okay, i have got my hands on a 12V relay driver IC. I have no idea on how to connect it with the motor. What are the connections and what changes do i have to make to the program code?
Thu Mar 08 2018, 08:08 PM
#15
I have connected the pins in proteus and used the same code that i have posted before to run this simulation.
On running the simulation, the motor just starts and keeps on running. What do i have to do to make it run only when i scan a valid rfid tag?



[ Edited Thu Mar 08 2018, 08:14 PM ]
Thu Mar 08 2018, 09:49 PM
#16
Your simulation uses a relay.
Do you have a relay...if so what model is it ?
If you don't have the right relay your motor can only go one way.
Is that okay .. stop and start, but only in one direction ?

Meanwhile, remove the connection from U2 pin 16 to ground.
Fri Mar 09 2018, 03:57 AM
#17
It's a single chanel relay. 😔 I guess it won't work. Isn't there a way where i make it rotate in both directions, by giving different commands? Please help me with the codes. I have managed to sort out the connections, tell me if it's right. + and - to 5v and Gnd. NO to the motor and the other end of the motor should be connected to negative of the battery. COM would be connected to the positive of the battery.


[ Edited Fri Mar 09 2018, 07:08 AM ]
Fri Mar 09 2018, 08:48 PM
#18
" Isn't there a way where i make it rotate in both directions,
by giving different commands? Please help me with the codes."

There is, but you need the right hardware.
There are many combinations of relays, drivers and simple transistors.
It depends on what you have or can get.

Are you able to get a 5 or 12 volt, double throw double pole relay
or more single pole relays as in the Proteus simulation ?
If you use a motor you also have to consider what happens
at end of travel.
When raising or lowering an arm you normally need limit switches
to know when to stop.

Normally door locks don't use a motor,they use one of these locks
operated by a coil like a relay.


Electric Strike for Door Entry Access Control Systems
much like a relay.


[ Edited Fri Mar 09 2018, 08:56 PM ]
Sat Mar 10 2018, 01:03 AM
#19
I said it before, i have changed the project to secure car access system in a Society, so i think the door(which is just a long rod or something) opens horizontal to vertical and back again, uses a motor. 😅Goodness so now i need a limit switch too in addition to another relay. I can't get my hands on one. The shop which sells these things is very far away from my home and no one is ready to travel that far again. I thought connecting a relay would be easy, but it's even harder than the motor driver ic. If only the motor driver worked, it would have been great. I suppose now i am stick with led. 😔
Sat Mar 10 2018, 02:01 AM
#20
>I said it before, i have changed the project to secure car access system
Actually you said you were "thinking" of changing to a secure car access system.

>Goodness so now i need a limit switch too
No, you will need two limit switches.

>now i am stick with led.
You could have two LEDs, one for motor forward, one for back.

You unlock the car with an RFID key.
How do you lock it ?



[ Edited Sat Mar 10 2018, 03:51 AM ]

Get Social

Information

Powered by e107 Forum System

Conversation

shshistiem
Thu Sep 13 2018, 04:28 AM
hii!! some1 please let me know how i ll get rfid code to 8051 by WEIGAND mode
DrNossberg
Wed Sep 12 2018, 01:39 AM
is there anyone here?
Mon Aug 27 2018, 01:00 PM
bun
Hello everyone!
Sat Jul 21 2018, 11:51 AM
Dibakar Bhanja Chowdhury
By using a 555 timer how can I expand the range of the mobile phone jammer? Please reply me asap
Sun May 20 2018, 03:31 PM
justinb
how to write and execute a program that read the keypad button and display the number on 7 segment on intel8051 at89s52 in assembly language?
Thu May 17 2018, 12:06 PM
HAMZA TAJ
sir iwant to ask about controller of three phase supply by using back to back thyristor instead of triac....will u give me some guideline?
Sat Apr 28 2018, 06:24 PM
ashutosh jain
IR Remote Switch using TV remote (RC5 Protocol) is not working properly. opp1 & opp2 is in problem.plz help
ExperimenterUK
Sat Apr 28 2018, 01:39 AM
@kaiserslautern Post in forum
Wed Apr 25 2018, 12:39 PM
kaiserslautern
Hello everyone, using software uart is a very good idea for a second serial port. Thank you so much. I would kindly like to know how to connect this port to the PC?
ExperimenterUK
Sun Apr 22 2018, 01:20 AM
This is a community site. Feel free to help anyone needing advice

Downloads

Comments

PCBindex
Fri Sep 14 2018, 02:45 AM
sirkit
Thu Sep 13 2018, 04:46 AM
shshistiem
Wed Sep 12 2018, 10:36 PM
DrNossberg
Tue Sep 11 2018, 03:25 PM
ranjanvh
Thu Sep 06 2018, 02:28 PM
rbbhamre
Tue Sep 04 2018, 06:15 PM
Tressie
Sun Sep 02 2018, 02:20 PM
Sudhansudeep
Fri Aug 31 2018, 08:26 AM

Online

Guests: 46, Members: 0 ...

most ever online: 182184
(Members: , Guests: 182184) on 06 Aug 2010: 05:37 AM

Members: 38006
Newest member: PCBindex
Forum Activity
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Sep 13 2018, 08:39 PM
First of all, by reading your reply, I abandoned m...
DrNossberg Avatar
Posted By DrNossberg
Thu Sep 13 2018, 03:49 PM
Hi, thanks you for your reply ^^ First of all, by ...
ExperimenterUK Avatar
Posted By ExperimenterUK
Wed Sep 12 2018, 12:12 AM
HiThere are several issues here.The original 8051 ...
DrNossberg Avatar
Posted By DrNossberg
Tue Sep 11 2018, 08:08 PM
Hello everybody!First of all let me explain some s...
ExperimenterUK Avatar
Posted By ExperimenterUK
Fri Sep 07 2018, 05:08 AM
The compiler thinks the micro doesn't have enough...
Sudhansudeep Avatar
Posted By Sudhansudeep
Fri Sep 07 2018, 02:59 AM
this is the build output message
Sudhansudeep Avatar
Posted By Sudhansudeep
Fri Sep 07 2018, 01:38 AM
Change the mobile number as [number removed] in t...
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Sep 06 2018, 08:56 PM
I don't know what the problem is, I get no errors....
Sudhansudeep Avatar
Posted By Sudhansudeep
Thu Sep 06 2018, 01:12 PM
the code is Attachment ...
Sudhansudeep Avatar
Posted By Sudhansudeep
Thu Sep 06 2018, 12:48 PM
the code is same as u sent me for 16 chars