H-Bridge circuit need help!

[Tac_T]

I'm looking to building this design, and need your guys help for circuit diagram and im looking to put in a diodes aswell. Where you guys think i need to put it?

Thank you

 

[barry]

We have NO IDEA what you are showing us.

 

[ZASto]

What you have on that breadboard? Four of something and another four of something linked with some jumpers :smile:

Post your schematic, please, if you seek help.

 

[barry]

I think those yellow wires should be green.

 

[Tac_T]

H-Bridge on a Breadboard

this the website where i got the picture from.

thank you

 

[Audioguru]

Most Instructables are made by people who know NOTHING about electronics. That is why there is no schematic and why half of the H-bridge uses emitter-followers that produce voltage loss.

 

[Tac_T]

so the circuit no good?

 

[Audioguru]

so the circuit no good?

It is simple and old.
Because its upper transistors (upper on a schematic) are NPN then they are emitter-followers that produce a voltage loss to the motor. Maybe your motor doesn't care about the voltage loss then this circuit is fine. The voltage loss causes heating of the upper transistors which might burn them if the current is high.

Most H-bridges use PNP transistors for the upper transistors or Mosfets for all the transistors.