Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

DC 12V MOTOR CONTROL . FWD , REV , SPEED CTRL ..... MODIFIED

Status
Not open for further replies.
ammarabbasi

ammarabbasi

Junior Member level 3
Joined
May 31, 2008
Messages
27
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,283
Location
Lahore
Activity points
1,435
THIS CIRCUIT CAN BE USED IN HOBBY VEHICALS . THESE 5 CONTROLS ARE DONE BY SIMPLE MEANS.

FORWARD .
REVERSE.
BRAKE.
SPEED CONTROL.
4WD.

PLEASE FEEL FREE TO SUGGEST. [/img][/b]


MODIFICATION : SHORT CIRCUIT REMOVED.CONNECTED ACROSS FIRST MOTOR.
 

Re: DC 12V MOTOR CONTROL . FWD , REV , SPEED CTRL , 4WD , BR

Surprizing operation of the brake control!
 

Re: DC 12V MOTOR CONTROL . FWD , REV , SPEED CTRL , 4WD , BR

Hi,
Very strange braking solution !!!
It's looks like battery's short-circuit. Be careful with this solution your accumulators can explose.
CD:D
 

    V

    Points: 2
    Helpful Answer Positive Rating
DC 12V MOTOR CONTROL . FWD , REV , SPEED CTRL , 4WD , BRAKE.

ammarabbasi,

Move the wires on the break pushbutton so it's across the motor terminals...not the battery terminals. For better long term life for your pushbuttion, add a low ohm/high wattage resistor in series with one of the pushbutton wires. In the Fisher-Price Power Wheels (**broken link removed**) they use a 0.47 ohm/10 watt resistor. This limits the breaking current, saving the switch contacts, and provides more gentle breaking action. The higher the resistance, the slower the breaking action...the lower the resistance, the more abrupt the breaking.

Ken
 

    V

    Points: 2
    Helpful Answer Positive Rating
Re: DC 12V MOTOR CONTROL . FWD , REV , SPEED CTRL , 4WD , BR

Thank you buddies .

Added after 4 minutes:

i also want to add an other motor for steering function . i think a PWM motor with pulse . i any body got some idea . please help me out.

thanks
 

Re: DC 12V MOTOR CONTROL . FWD , REV , SPEED CTRL , 4WD , BR

ammarabbasi,

Another problem I see is that unless your switch(s) have a center-off position, power is "always" being applied to the motor(s). But, this may be what you are showing in the lower left picture. A DPDT relay will not replace a DPDT-center-off switch.

As for steering, are you making a remot control device?

Ken
 

Re: DC 12V MOTOR CONTROL . FWD , REV , SPEED CTRL , 4WD , BR

WOW THE EXTREEEEEMMM BRAKE OPERATION, if you use more then 1 AH battery, your cable will burn so quick,
 

Re: DC 12V MOTOR CONTROL . FWD , REV , SPEED CTRL , 4WD , BR

Hi,
For little power you can use integrated Hbridge (L292; L298; LMD18200).
This circuits contain current measure and braking command.

CD:D
 

Re: DC 12V MOTOR CONTROL . FWD , REV , SPEED CTRL , 4WD , BR

thanks for the correction done in the schematic.
 

Re: DC 12V MOTOR CONTROL . FWD , REV , SPEED CTRL , 4WD , BR

NEW INVENTION ! NEW BATTERY RETHER :cry:
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top