[simpits-tech] Electronics question

[Joseph Fagner]

So the A and B are used to open the base of the transistor to pull "X" to 5v
or ground, correct?  Will your circuit work with "X" at 2.5 volts.i.e.
neither high nor low?  How is "X" being measured/monitored?

 

Also, make sure both transistors don't open at the same time.


Jay

 

Show me a man who cannot be bothered to do the little things, and I will
show you a man who cannot be trusted to do the big ones.

--Lawrence Bell, Founder Bell Helicopter

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From: simpits-tech-bounces at simpits.org
[mailto:simpits-tech-bounces at simpits.org] On Behalf Of Jeroen Huijben
Sent: Thursday, March 12, 2009 10:13 AM
To: Simpits List
Subject: [simpits-tech] Electronics question

 

I am wondering if this will work.
 
I have a voltage divider of two resistors, set to put 2.5V at the output X
when 5V is set over it.
I want to use a logic chip (74HC74 dual Dtype flipflop) to pull the output
to 0V or 5V, depending on how a rotary encoder turns.
I have found how to turn the signal of the rotry into a high on either of
two outputs of the flipflop.
Now I want to use two transistors to short out either of the resistors so
that the output X is connected to either side of the divider.
 
http://i40.tinypic.com/jajuag.gif
A and B will go straight to the chip with only a diode in between.
 
Will this work?
Can I use any regular transistor?

Regards,
Jeroen.

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