need driven motor by 8051

[diver143]

need driven motor circuit by the car battery 12vdc.

that is a

Car motor's window

useing the 8051

thankz

 

[marie65]

Do you need variable speed, overcurrent detection, both sens of rotation?

 

[diver143]

no just up and down

regards,
diver143

 

[marie65]

The simplest way is to use 2 relays each with 1 NO and 1 NC contacts. The relays are driven by the 8051 using optocouplers follow by a npn transistor(my option). The power schematic is
V+ --- R1NO --- Motor---- R2NC - gnd
gnd -- R1NC--| |---R2NO - V+
If you close relay1, motor will rotate one sense. Closing relay2 will rotate the other sense
Another option is to use instead of relays 4 power transistors (or 2 transistor and 2 diodes) in a H configuration.
Fuses are necessary to be use.

 

[diver143]

THANK YOU SO MUCH.

I'LL SEE :lol:

 

[lockerman]

You can use transistor bridge and drive it by digital ports.

______________________ +12
| |
PNP PNP
| |
-------(M)---------
| |
NPN NPN
| |
-------------------------
|
--- GND

If u need to chane a speed use just PWM and that's it.

Lm

 

[lockerman]

Sorry,
drawwing by chars does not work as I expected.

Transistors T1 and T2 have to switched on at the same time for one direction. To change direction in oposit way T3 and T$ have to be switched on at the same time.

Do not forget to use PWM if u want to control speed

Lm

 

[mgajo]

Hi
You can use L293 or L272 for smaller motors
Take a look at www.st.com for applications and data sheets,
also Allegro and NJRC for integrated components.

bye 8)