Is it okay to use two 3.7V AA battery to replace two 1.5V AA battery?
brighter LED?
Can use two 3.7V AA battery?
Moderators: adafruit_support_bill, adafruit
5 posts • Page 1 of 1
Can use two 3.7V AA battery?
by tony18183 » Thu Apr 19, 2012 8:08 am
- tony18183
- Posts: 28
- Joined: Mon Dec 19, 2011 10:19 pm
Re: Can use two 3.7V AA battery?
by adafruit_support_bill » Thu Apr 19, 2012 8:12 am
Two 3.7v cells is way too much voltage. You will burn out the LEDs if you don't fry the processor first.
-
adafruit_support_bill - Posts: 15918
- Joined: Sat Feb 07, 2009 9:11 am
Re: Can use two 3.7V AA battery?
by tony18183 » Thu Apr 19, 2012 9:29 am
what is the maximum voltage can take without getting the LEDs or processor fry?
- tony18183
- Posts: 28
- Joined: Mon Dec 19, 2011 10:19 pm
Re: Can use two 3.7V AA battery?
by adafruit_support_bill » Thu Apr 19, 2012 10:01 am
The processor is 5.5v max. For the LEDs, you need to worry about current. The current going to the leds is controlled partly by the battery voltage and partly be the resistor arrays RN1-RN8. The LEDs are rated for 20mA each.
Details on driving LEDs are here: http://www.ladyada.net/learn/arduino/LEDs.html
Details on driving LEDs are here: http://www.ladyada.net/learn/arduino/LEDs.html
-
adafruit_support_bill - Posts: 15918
- Joined: Sat Feb 07, 2009 9:11 am
5 posts • Page 1 of 1
Who is online
Users browsing this forum: No registered users and 2 guests
Stuff to buy from the Adafruit store and links to product documentation!
New Products [105]
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[30]
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[33]
LCDs & Displays[48]
Components & Parts[69]
Batteries & Power[49]
EL Wire/Tape/Panel[52]
LEDs[108]
Wireless[14]
Cables[60]
Lasers[6]
Sensors/Parts[145]
Enclosures/Cases[11]
Solar[11]
RFID / NFC[13]
Prototyping[69]
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[30]
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 [13]
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[60]
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[69]
Tools[71]