The MCP23017 16 pin I/O expander does not work properly. I have followed the datasheet and the instructions in the example code on Github, but the chip does not do anything except turn on like 3 pins HIGH, and only one should be HIGH. This is weird. Can not even bring it to LOW. All connections are fine, I have orientated the chip so I can read the label on it. According to the datasheet, I have done everything right (I hope).
Please Please please help, this is urgent.
Thanks a lot
MCP23017 Not Working
Moderators: adafruit_support_bill, adafruit
3 posts • Page 1 of 1
MCP23017 Not Working
by Rahatmaini » Sat Feb 16, 2013 10:51 pm
- Rahatmaini
- Posts: 148
- Joined: Wed Aug 29, 2012 4:15 pm
Re: MCP23017 Not Working
by Rahatmaini » Sun Feb 17, 2013 10:42 am
False Alarm, had it plugged in the wrong way. I am stupid.
Does this mean that now the chip is useless? I had it flipped the way it is normally supposed to be, with that semicircle indent on the bottom not the top. Do I need to buy another one now or will this still work (I havent had time to try it yet)?
Does this mean that now the chip is useless? I had it flipped the way it is normally supposed to be, with that semicircle indent on the bottom not the top. Do I need to buy another one now or will this still work (I havent had time to try it yet)?
- Rahatmaini
- Posts: 148
- Joined: Wed Aug 29, 2012 4:15 pm
Re: MCP23017 Not Working
by adafruit_support_rick » Sun Feb 17, 2013 4:53 pm
Plugging in in backwards should not have damaged it. But there's only one way to know for sure!
-
adafruit_support_rick - Posts: 2907
- Joined: Tue Mar 15, 2011 10:42 am
- Location: Buffalo, NY
3 posts • Page 1 of 1
Return to Other Arduino products from Adafruit
Who is online
Users browsing this forum: No registered users and 3 guests
Stuff to buy from the Adafruit store and links to product documentation!
New Products [108]
Raspberry Pi[80]
FLORA[23]
Bunnie Studios[9]
FPGA[1]
mbed[11]
Arduino[60]
NETduino[14]
BeagleBone[24]
Android[6]
XBee[10]
More Dev Boards[31]
BoArduino[8]
SpokePOV[4]
TV-B-Gone[4]
MiniPOV[3]
SIM reader[3]
Microtouch[5]
Clocks & Watches[18]
Drawdio[4]
Brain Machine[1]
Game of Life[2]
MintyBoost[2]
More DIY Kits[16]
MaKey MaKey[3]
Tweet-a-Watt[5]
Young Engineers[33]
Discover Electronics[2]
Snap Circuits[4]
littleBits[3]
Project packs[8]
Breakout Boards[34]
LCDs & Displays[48]
Components & Parts[70]
Batteries & Power[49]
EL Wire/Tape/Panel[52]
LEDs[111]
Wireless[14]
Cables[62]
Lasers[6]
Sensors/Parts[145]
Enclosures/Cases[11]
Solar[11]
RFID / NFC[13]
Prototyping[70]
iDevices[13]
Tools[71]
Wearables[39]
CNC[37]
Robotics[29]
3D printing[1]
Materials[24]
Stickers[41]
Skill badges[55]
Books[25]
Circuit Playground[7]
Gift Certificates[4]
Raspberry Pi[80]
Displays [12]
Books [3]
Cables [12]
Accessories [10]
Boards & Packs [6]
Prototyping [7]
Cases [15]
Essentials [15]
Arduino[60]
More Dev Boards[31]
More DIY Kits[16]
LCDs & Displays[48]
Character [12]
VFD [2]
Graphic TFT [6]
HDMI/VGA/NTSC/PAL Displays [3]
Other [1]
OLED [5]
Graphic LCD [6]
eInk / ePaper [3]
NTSC/PAL TFTs [7]
Graphic LED [3]
Heat Sinks [4]
Passives [5]
Storage [7]
Sockets/Connectors [8]
IC & Transistors [14]
Other [14]
Header [6]
Switches & Buttons [12]
Cables & Adapters [13]
LiIon & LiPoly [8]
Wall Adapters [6]
Power Converters [4]
Battery Holders [11]
Power Switch [3]
Batteries [4]
EL Wire [12]
Flowing EL Wire [3]
Flowing USB Cables [6]
EL Starter Packs [5]
EL Tape [8]
EL Panel [5]
Inverters & Extras [13]
Cables[62]
Sensors/Parts[145]
Biometric [3]
Buttons & Switches [39]
Radiation / Geiger [2]
Liquid/Flow [4]
Barometric / Pressure [2]
Money / Coin [2]
Sound [2]
Location (GPS) [6]
Camera [2]
Movement [6]
Touch [22]
Temperature [17]
Light/Photo [6]
Humidity [6]
Proximity [17]
Other [9]
Prototyping[70]
Tools[71]