On the tweet a watt Receiver
Why is this IC neeeded ? Just a buffer to help isolate the X-bee from the USB cable ?
thanks
randy
What does the buffer IC 74AHC125N do ?
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Re: What does the buffer IC 74AHC125N do ?
thats right! it converts 3-5V signal to 3v signal
- ericzundel
- Posts: 41
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Re: What does the buffer IC 74AHC125N do ?
Read the soldering instructions:
http://www.ladyada.net/make/xbee/solder.html
Scroll down to the description of the buffer. It allows the 3.3V and 5V logic to interface without letting the smoke out of the 3.3V chips. You might want to find a datasheet for a 74AHC125 and read up on it a bit if you are still curious.
http://www.ladyada.net/make/xbee/solder.html
Scroll down to the description of the buffer. It allows the 3.3V and 5V logic to interface without letting the smoke out of the 3.3V chips. You might want to find a datasheet for a 74AHC125 and read up on it a bit if you are still curious.
- randykarr
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- Joined: Tue Aug 11, 2009 2:12 pm
Re: What does the buffer IC 74AHC125N do ?
If you buy the 3 volt TTL to USB cable, the chip is unneeded ?
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Re: What does the buffer IC 74AHC125N do ?
it is not necessary in that case
Please be positive and constructive with your questions and comments.