The L293N on the board with ready made interface may prove a little less trouble?

I already have that one (came yesterday) but the size is not going to work on my project and that is why I was looking at the L293N asi can make the circuit smaller…?

 

I already have that one (came yesterday) but the size is not going to work on my project and that is why I was looking at the L293N asi can make the circuit smaller…?

I think you will need a transistor H Bridge or a transistor/mosfet arrangement if the control signal is only 2 volts.

 

I think you will need a transistor H Bridge or a transistor/mosfet arrangement if the control signal is only 2 volts.

Thank you for your reply and yes I know I will need a transistor to switch thee 2 volt signal. I’m think of using BC558 transistor as my increased trigger source?

Thank you, Ron

 

One suggestion, depending on how the 2 volt trigger is generated.
What is the source of this trigger pulse?

 

Whatever device is used to drive the motor will need to have both sides able to provide both a current SOURCE mode AND a current SINK mode, with both modes being adequate to supply the requred current. An open collector output will not be able to do that directly.

 

An open collector output will not be able to do that directly.

Are you referring to my circuit in post #24?

 

The NE555 can Sink or Source 200ma !

 

Hi guys, I have looked into the l293n and the l293d, but just realized that the voltage drop in them is too much for me and will make the motor run too slow.

i am now thinking of making a mosfet h-bridge to cut down on voltage loss. I came across this circuit and was wondering if this would be a good start to my project and wanted to get you guys opinions on it.

I tried sending it as a file but to would not let me so I took a pic of it to give you an idea on what Im thing of using.

thank you, Ron

 

Technically it looks correct using switches but where does this 2 volt trigger pulse work in the circuit?

 

Thank you for your reply MaxHeadRoom, will that module run my 12vdc .02amp motor at full speed? That is one of my big concerns.

thank you Ron

 

Technically it looks correct using switches but where does this 2 volt trigger pulse work in the circuit?

The two volt signal come from a out side source that only comes on for about 3 seconds then off.

thank you, Ron

 

Technically it looks correct using switches but where does this 2 volt trigger pulse work in the circuit?

The switches will be replaced with separate external sources

 

The switches will be replaced with separate external sources

Suggestion using a single 2 volt trigger.

 

Suggestion using a single 2 volt trigger.
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Thank you sghioto, can you expand on this circuit a little for me. I see that it has a 2v trigger but I do not understand where the second trigger is. I want to operate this switch as two position, forward and reverse.

I’m very interested in this circuit, it is small and uses small housed MOSFETs keeping the foot print small and low cost.

On another note the second trigger will be a 12vdc pulse, so one direction with a 2 volt signal and the other direction with a 12volt signel.

Thank you, Ron