<< return to Pixycam.com

User Tools

Site Tools


wiki:v2:powering_pixy

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
wiki:v2:powering_pixy [2018/05/24 19:25]
pixycam
wiki:v2:powering_pixy [2018/05/24 22:39] (current)
pixycam [I/O connector]
Line 25: Line 25:
 The I/O connector is marked "​J2"​ on Pixy2'​s PCB. Pin 2 of the I/O connector can accept 5V for powering Pixy2. This is convenient when you want to power Pixy2 through the Arduino cable (ie, by hooking up the Arduino cable, your Arduino is powering Pixy2, assuming your Arduino is suitably powered.) Or you can make your own I/O cable for Pixy2 communication/​power,​ **but be careful! Pin 2 and the ground pin (pin 6) are not reverse-polarity protected. Get the power backwards and Pixy2 is a goner. For good!** The I/O connector is marked "​J2"​ on Pixy2'​s PCB. Pin 2 of the I/O connector can accept 5V for powering Pixy2. This is convenient when you want to power Pixy2 through the Arduino cable (ie, by hooking up the Arduino cable, your Arduino is powering Pixy2, assuming your Arduino is suitably powered.) Or you can make your own I/O cable for Pixy2 communication/​power,​ **but be careful! Pin 2 and the ground pin (pin 6) are not reverse-polarity protected. Get the power backwards and Pixy2 is a goner. For good!**
  
-Note also, ribbon cables can drop. So it's unlikely you can power Pixy2 through the I/O connector via ribbon cable **and** have enough power left over for controlling RC servos. The voltage will drop too much across the ribbon cable. Nothing bad will happen, if you try this but the servo will likely malfunction. 
  
-{{wiki:img:c38c5bf8e350433e686aca84ca8bab657844d78c.jpg?400}}+{{wiki:v2:image_248_2.jpg?640}}
  
  
-==== Power connector ​====+==== Unregulated power ====
  
-The power connector ​is marked "​JP1"​ on Pixy's PCB. Although we totally expect that 90% of Pixy users to use the first two choices (above), we've included a third choice -- an unregulated power input. ​Because we love it when we feel taken care of, and we've taken care of you, unregulated Pixy power person.+The I/O connector ​has an unregulated power input (Vin, pin 10) You can provide between 6V and 10V to this input and Pixy2's linear regulator will create the 5V power rail 
  
-It is recommended that you use this option if you plan on using the pan/tilt unit with Pixy and an Arduino (and no USB cable). In this case, **Pixy is sourcing the power** and powering the Arduino through the Arduino cable, and **that'​s perfectly fine**, because Pixy can source up to 1.5A of current, which is plenty for itself, the servos and the Arduino. If you attempt to have the **Arduino source the power** and power Pixy and the pan/tilt through the Arduino cable, either the Arduino'​s power regulator will be overwhelmed,​ or you'll lose a lot of power through the cable, both of which will mean **the servos won't function** (they'​ll probably move to one end of their limits and buzz). 
  
-OK, here are the pinouts and polarity of the power connector:+Powering Pixy through Vin (pin 10) can result in more current being available for the RC-servos to use with the pan-tilt unit.  Connecting Pixy2 to an Arduino when Pixy2 is being powered through Vin results in **Pixy2 sourcing ​the power for the Arduino**. ​ This is sometimes preferable to the Arduino sourcing power to Pixy2 because the voltage regulator on some Arduinos cannot handle the current requirements of Pixy and the pan-tilt unit (two RC-servos.)  ​
  
-{{wiki:​img:​009f85f400e62fedbfd2d8b474515f3427b6529b.jpg?​400}} 
  
-The power connector is reverse-polarity protected, so nothing bad will happen if you get things backwards. The mating connector is a polarized connector from Molex that comes in two parts: +Some additional notes:
-  - **The housing**, Molex PN 22-01-3027, available from [[http://​www.digikey.com/​product-search/​en?​x=0&​y=0&​KeyWords=22-01-3027|Digikey]] and [[http://​www.mouser.com/​ProductDetail/​Molex/​22-01-3027/?​qs=%2fha2pyFadujVoN8fcIRqZsMlWF6dgIQRsLjTxOPvJ04%3d|Mouser]] +
-  - **The crimp pins**, Molex PN 08-50-0113, you'll need at least 2 of them, also available from [[http://​www.digikey.com/​product-detail/​en/​0008500113/​WM1114CT-ND/​467980|Digikey]] and [[http://​www.mouser.com/​ProductDetail/​Molex/​08-50-0113/?​qs=sGAEpiMZZMs%252bGHln7q6pm%252bS0pk2Wo0Xxry%2f2CCsvuc0%3d|Mouser]]+
  
-It is safe to connect ​Pixy to a computer via USB while powered ​using this method.+  * Vin (pin 10) of the I/O connector is reverse-polarity protected, so nothing bad will happen if you get things backwards. 
 +  * It is safe to connect ​Pixy2 to a computer via USB while Pixy2 is powered ​through Vin.
  
  
wiki/v2/powering_pixy.1527189904.txt.gz · Last modified: 2018/05/24 19:25 by pixycam