74HC595 Shift register question
#1
Posted 16 January 2012 - 04:10 AM
#2
Posted 16 January 2012 - 04:38 AM
Your questions are totally legal, and may help many other people. So, feel free to ask any other question you want...
Preface: the ICs come in several packages: we'll consider only the DIPs (=Dual In Line), because it's the only one that can be used by hobbists. It's the "bigger", and can be inserted in a breadboard. Other packages are classified as "SMD" (Surface-Mount Devices), because they require no holes.
1) pin-count. The chip has some mark (notch, bump, etc) on one edge of its package. If you rotate the chip so that its label is readable, this mark is on the left edge. The bottom-left pin is always the number "one", then count the other pins in a counter-clockwise direction.
Note: for bigger chips (e.g. 24 and over pins), the label could be readable when the mark is on the top edge. Simply turn the chip as long the mark is on the left.
2) there's a simple circuit 74HC595-based, to drive up 8 led, independently. You can find it on this forum Wiki:
http://wiki.netduino...t-Register.ashx
I agree on taking practice with very basic circuits, and understand how they work, first.
Currently the Netduino site is a bit messy, but there are a lot of resources to learn from.
Cheers
- Thomas Mason likes this
#3
Posted 16 January 2012 - 06:30 PM
#4
Posted 19 January 2012 - 12:22 AM
Mario,
Thank you that is exactly what I needed. I figured the notch had some significance but I didnt want to break anything.
Thank you very much.
I would add that you should look up the data sheet for your IC. It will tell you the exact pinout, operating parameters, etc. It's typically a PDF that is available through the manufacturer. I order almost all my parts from mouser; they provide the datasheet link on the product details page.
Pete
I work for Microsoft. Opinions expressed here are my own and do not necessarily reflect those of my employer,our partners or customers.
#5
Posted 20 January 2012 - 03:20 AM
I would add that you should look up the data sheet for your IC. It will tell you the exact pinout, operating parameters, etc. It's typically a PDF that is available through the manufacturer. I order almost all my parts from mouser; they provide the datasheet link on the product details page.
Pete
Thanks I will look into that
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