Inverter project 16f877A

[Daham]

I am working on inverter project. I use 16f877A and its one port pin outputs square pulses.
I want to these pulses to split (+5 and -5). How realize that?
I am using mikroc.
Please help me.

 

[rajudp]

you cannot out -5 volt from pic pin

 

[DineshSL]

Hi,

You may use uC output to drive transistors; then switch split-supply by transistors.
Hope this helps to develop your circuit.

 

[kabiru]

Or use rail to rail op-amp then you can get +5 and-5v but why do you need -5v for inverter?

 

[Daham]

Thank u for reply.
I changed my circuit, PNP to NPN.
This is my inverter circuit diagram.
How calculate R4 and R5 values?

 

[kabiru]

With your diagram i dont think you need any negative voltage,

 

[DineshSL]

Hi,

Simple way is simulate the whole circuit (also with load connected); and adjust resistor values to work Transistors within their limits.

Thank you,

 

[kabiru]

In your diagram above R3 and R4 has 100ohms resistor which enable small amount of current to flow through collector,they should be change to a very low value may be 0.1ohms.

---------- Post added at 12:54 ---------- Previous post was at 12:42 ----------

Also to calculate for the value of R4 and R5,you have to sellect a suitable gain of the transistor say Beta=40 then transistor IC then you can find you ib,since you know you voltage to the base Vb, you can find Rb.