tutorials:products:rfidnfc:wiring.html
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tutorials:products:rfidnfc:wiring.html [2011/09/02 17:01] ladyada created |
tutorials:products:rfidnfc:wiring.html [2016/01/28 18:05] (current) |
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| + | ====== Moved! ====== | ||
| - | ==== Wiring ==== | + | This tutorial has moved to [[http://learn.adafruit.com/adafruit-pn532-rfid-nfc|http://learn.adafruit.com/adafruit-pn532-rfid-nfc]] |
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| - | The PN532 chip and breakout is designed to be used by 3.3V systems. To use it with a 5V system such as an Arduino, a level shifter is required to convert the high voltages into 3.3V. If you have a 3.3V embedded system you won't have to use the shifter of course! | + | |
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| - | To begin, we'll solder in the header to the breakout board. You'll need two small 3-pin pieces of header and one 8-pin piece. You can break these off of a large piece | + | |
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| - | [[http://www.ladyada.net/images/pshield/breakplier.jpg|{{ http://www.ladyada.net/images/pshield/breakplier_t.jpg?nolink&500x375 |}}]] \\ [[http://www.ladyada.net/images/pshield/breakclip.jpg|{{ http://www.ladyada.net/images/pshield/breakclip_t.jpg?nolink&500x375 |}}]] \\ {{ http://www.ladyada.net/images/boarduino/jumperheader.jpg?nolink&444x326 |}} | + | |
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| - | Solder the two small pieces to the **SEL0** and **SEL1** pads. These are interface selectors for the chip. Depending on how the jumpers are inserted the chip will talk in TTL serial, i2c or SPI//. //Also solder a strip to the end so you can plug it into a breadboard | + | |
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| - | [[http://www.ladyada.net/images/rfidnfc/header.jpg|{{ http://www.ladyada.net/images/rfidnfc/header_t.jpg?nolink&500x342 |}}]] | + | |
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| - | Wire up the 4050 level shifter chip to the Arduino as shown. The notch in the 4050 is at the 'top' in this image. | + | |
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| - | *Arduino digital pin **2** is connected to 4050 pin **9** (orange wire) | + | |
| - | *Arduino digital pin **3** is connected to 4050 pin **11** (yellow wire) | + | |
| - | *Arduino digital pin **4** is connected to 4050 pin **14** (green wire) | + | |
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| - | On the breakout board | + | |
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| - | ***3.3Vin** is connected to the Arduino **3.3V** pn | + | |
| - | ***SCK** is connected to 4050 pin **10** (orange wire) | + | |
| - | ***MISO** is connected to Arduino pin **5** (blue wire) | + | |
| - | ***MOSI** is connected to 4050 pin** 12** (yellow wire) | + | |
| - | ***SSEL** is connected to 4050 pin **15 **(green wire) | + | |
| - | ***GND** connects to Arduino** ground** (black wire) | + | |
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| - | Also connect 4050 pin #1 to **3.3V** and pin #7 to **ground**. | + | |
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| - | Click to see a larger image. The red power wire should be connected to the **3.3v **pin on the Arduino! | + | |
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| - | [[http://www.ladyada.net/images/rfidnfc/pn532wiring.jpg|{{ http://www.ladyada.net/images/rfidnfc/pn532wiring_t.jpg?nolink&500x333 |}}]] | + | |
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| - | Also, we need to select SPI as the interface so on **SEL1** place the jumper in the **ON** position. for **SEL0** place the jumper in the **OFF** position | + | |
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| - | That's it! Later on you can change what Arduino pins you are using but for the beginning test we suggest matching our wiring. | + | |
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