i need help in dc motor

Thread Starter

ahmedahmedahmed

Joined Nov 12, 2007
29
hi all
h r u there
i need help in dc motor
i need to control it speed at two direction but using wireless circuit
i need all it circuit


so help me pleaseeeeeeeeeeeeeeeee

thanks
 

thingmaker3

Joined May 16, 2005
5,084
Please provide additional details. What voltage motor? What power? What wireless scheme?

Also, please try to use appropriate spelling and grammar. Please refrain from "keyboard speak."
 

thingmaker3

Joined May 16, 2005
5,084
To control both speed and direction, an H-bridge is the way to go. PWM for the bridge can be generated by a microprocessor. Said microprocessor can also decode pulses from your IR receiver.

What is your level of expertise with electronics?
 

thingmaker3

Joined May 16, 2005
5,084
Let's break this into three individual topics:

1) H-bridge

2) "PWM" or "Pulse Width Modulation"

3) IR remote control

Start with one, and only one of the above topics. Use the search function on this forum, and also use an internet search engine. Learn what you can about the topic, then come back here and ask specific questions to complete your understanding of that one topic.

Then choose a second topic and repeat.
 

Thread Starter

ahmedahmedahmed

Joined Nov 12, 2007
29
i have H-bridge which drive the motor.
also i have pwm and it is controlled by variable resistance.
is that good or not???????

what about IR remote control
thanks
 

thingmaker3

Joined May 16, 2005
5,084
Good work! Now you just need to figure out a way to control PWM via your IR reception. The variable resistance driven PWM might work, if you can substitute a voltage from your IR receiver in place of the variable resistor. Can you post a schematic?

Do you have an existing IR remote control system, or do you want to design one?
 

Thread Starter

ahmedahmedahmed

Joined Nov 12, 2007
29
SO the way to control is change variable resistance with an IR circuit.
I do not have one. How can I design one? and is it hard to do it or not?

thanks alot
 

thingmaker3

Joined May 16, 2005
5,084
First, post a schematic of the PWM circuit you are considering.
We'll look at some different IR receiers and try to come up with a plan.
 

Thread Starter

ahmedahmedahmed

Joined Nov 12, 2007
29
i need your help in IR.
and i think that there is must be (transmitter and reciver).
is that right??? or not

i put PWM circuit at previous replay

i am waiting ur replay
thanks alot
 

Voltboy

Joined Jan 10, 2007
197
use a IR reciever that changes a digital potentiometer for the PWM.

Just instead of the 500k pot use a digital pot that is changed by the IR reciever.
 

Thread Starter

ahmedahmedahmed

Joined Nov 12, 2007
29
i put my PWM circuit. And i need to control dc motor using IR to that circuit.
what can i do for that???
please help me
can i control my dc motor using LM324 IC and IR or not??? i mean my circuit???
help me thingmaker3 please!!!!!!!!!!!!!!
thanks alot
 

thingmaker3

Joined May 16, 2005
5,084
Hi, Ahmed. Some of us can get pretty busy on the weekends. It doesn't mean we've forgotten you! Replies can sometimes take up to a week.
 

thingmaker3

Joined May 16, 2005
5,084
What control scheme have you chosen? FSK? Pulsed cod? Something else?

Are you willing to incorporate a microprocessor in either the device or the remote control or both?

Also: share with us the work you have done so far. That way we won't be "barking up the wrong tree."
 
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