trame ppm

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lecougar
Posts: 1
Joined: Sun Jun 05, 2011 3:30 pm

trame ppm

Post by lecougar » Sun Jun 05, 2011 8:01 pm

hello everyone, here is my problem
i do not know how to invert a signal.
actually, i have this signal which starts by a rising edge
tek00001.png
signal that i have
and instead i want this one which starts by a falling edge
tek00000.png
signal that i wanna have
i don't know if it is possible to change the first one in order to get the other
thank you in advance.

LubinKerhuel
Site Admin - Expert
Posts: 616
Joined: Wed Mar 07, 2007 11:23 pm
Location: Bayonne- France
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Re: trame ppm

Post by LubinKerhuel » Mon Jun 27, 2011 11:43 pm

Want to do this with analogic electronics ?
What about using a transistor ? (you will not get 0V however byt 0.2 I guess)

Ender
Posts: 38
Joined: Thu Oct 09, 2008 5:20 pm
Location: Phoenix USA _ Grenoble Fr

Re: trame ppm

Post by Ender » Mon Aug 22, 2011 8:27 pm

Hummm; interesting...
I propose the classic 'put the screen upside down' :)

resodad
Posts: 71
Joined: Tue Jul 07, 2009 1:06 pm
Location: West Point, New York

Re: trame ppm

Post by resodad » Tue Aug 23, 2011 12:27 am

lecougar, use a 74LS04 inverter: http://www.datasheetcatalog.org/datashe ... 54LS04.pdf
John

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