Passing a pulse around a 7400

[liderbug]

My greenhouse. Raspberry Pi and a DHT22 (temp/humd). Right now I connected directly https://learn.adafruit.com/dht-humidity-sensing-on-raspberry-pi-with-gdocs-logging/wiring
I'd like to add a second DHT22 for outside temp/humd. (and other I/O) First RasPi does NOT interface TTL. The interface is 3.2v. I simulated using a 74LVX00 and an input from the GPIO as an A/B switch. Then I found out (cart...horse...) that to read data from the DTH22 I (the SW) sends a Vcc-0-Vcc pulse and duck here comes the data stream. And by inserting a 7400 in-line - OhWoops ain't got no pulse?

Suggestions?
Thanks.
cal

 

[Bluejets]

Most are going to find your shorthand description useless.
You will have to describe what you have and what you want clearly with a drawing also.

 

[BobK]

The article you linked describes how to connect 1 or more DHT22s to the Raspberry Pi. Why are you not doing what it suggests?

Bob

 

[liderbug]

You know I remember reading that .... now. Then.... poof! Thanks.