Single-board, dual-motor controller

[RobG 1,892]

Try changing Vdd in your simulator to 12V, that's why you need extra transistor with Vdd pull-up.

 

Also, if you are planning to use it for bigger loads, MOSFETs are a must.

 

Depending on the MOSFET, you may need additional transistors for Q3 and Q4.

 

Or how about something even simpler

[nuetron 64]

Try changing Vdd in your simulator to 12V, that's why you need extra transistor with Vdd pull-up.

I know. I'm using OC NANDs, so I don't need the extra transistors. I set the supply to +5v because I couldn't set the output of the NANDs in the simulator.

[RobG 1,892]

This is an interesting solution

[nuetron 64]

Very interesting... Where did you find it?

[RobG 1,892]

Here

[nuetron 64]

The only problem with that one is that it doesn't have a coast setting. I was hoping to make it fully functional, eg. forward, reverse, brake, and coast.

 

BTW: Is it possible for us to make it in such a way that whomever was populating the board had the option of using transistors or MOSFETs, without having to add extra holes and traces?

 

One of the reasons I'm asking about transistors is because I have two MJE15030's and two MJE15031's(npn and pnp, respectively).

These transistors are high-voltage-high-current devices.

MJE15030.PDF