connecting tip122 with dc 5volt motor with 8051

[hassan ali]

hi, sorry for my English
i want to control in DC 5 volt motor so i connected it with tip122 and a micro controller to set the base of transistor to became a switch , but the motors doesn't work here is my circuit i want to know if i connect the tip in right way or in wrong way , please help my.

https://obrazki.elektroda.pl/16_1306009074.jpg

 

[zuisti]

One possible solution (attached, from a Proteus example):

 

[hassan ali]

thank u for ur reply but please write the value of q3 because i can't see it

 

[kak111]

I hope these pictures helps you with motor circuit...................

**broken link removed**

http://www.mcmanis.com/chuck/robotics/tutorial/h-bridge/images/bjt-schematic.gif

**broken link removed**

Regards KAK

More general electronics knowledge and data you find in

Welcome, Join the group.

 

[zuisti]

Q3, Q4, Q7 and Q8: use small power NPN Si transistors here (like BC107

 

[hassan ali]

so , i can use bc107 instead of 2sc2547

 

[zuisti]

so , i can use bc107 instead of 2sc2547

Yes, any small power NPN.

@KAK:
(More general electronics knowledge and ...)
Nice collection

 

[alexan_e]

Check this H-bridge too
A simple H-Bridge design « PocketMagic

Alex