[sdiy] 74HC14 inverter

[harrybissell at wowway.com]

All you need to do is add a resistor from your 5V to the collector of the
transistor in the circuit you referenced (below) and you will get the
5V to 0V that you need.

You may or may not need the resistor. Moog had the pull-up resistor internal
to the synth

S (switch) trigger goes when a switch is closed to ground.

I'd suggest a 1K resistor if you need it.

You are on the right track now. I didn't see enough info in your
original post to comment...

H^) harry




On Mon, 08 Sep 2008 15:24:04 +0100, dave wrote
> Hello
> 
> It seems that I need +5v to 0v as a trigger. Would the 74HC14 enable 
> me to do this ? I have also found a v-trig to s-trig converter : 
> http://www.synthesizers.com/moog_trigger-convert.jpg Would I be 
> correct in thinking this circuit would convert my 0v to +5v to +5v 
> to 0v ? I am hoping that I dont need a continuos +5v and then pulses 
> of 0v... I dont know How I wouldimplement that...Any assistance much 
> appreciated regards dave
> 
> dave wrote:
> > Hi there People
> >
> > First time mailing here so go easy on me :) . Ive got a midi to cv 
> > trigger pcb with +5v outputs and I need -5v or inverted pulse ( as far 
> > as I understand it ) I have been recommended the 74HC14 hex inverting 
> > schmitt trigger. Apart from powering the chip do i need anyother parts 
> > ( resistors capacitors etc) apart from connecting the input of the 
> > chip to the output of my cv trigger? Can I just use the output of the 
> > chip to my trigger inputs on the device I am triggering ? Any helponn 
> > htis would be greatly appreciated .
> > regards
> > dave
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Harry Bissell & Nora Abdullah 4eva