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Electronic Switch reversal

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apstndp

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Hi,

I want electronic reversal of terminals of connector.
Can anyone give suggestion ?

The diagram is shown in the circuit.
I want terminals T1 and T2 to be connected between VCC and Ground or Ground and VCC by controlling Transistors Q1,Q2,Q3 and Q4.

My Vcc is square wave and it is varying. The current that can be drawn between T1 and T2 is uptp 2A.

Can anyone suggest how to control Transistors independently with optimized cost ?

Regards,
Siva.
 

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possibly pnp types for q1 and Q2 will make it easier, you can then add two extra npn transistors connecting the bases cross-wise (collector to base of Q1, emittor to base of Q4 and the second collector to base of Q2 and the second emittor to the base of Q3), and some extra resistors in the collectors of these transistors to limit the base current.

Draw the schematic, and you will see...

Stefaan
 
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