Arduino 16 Channel Digital Power ShieldSold By ElectronicKit.com
Overview Overview This stackable card provides an easy way to add 16 discrete power driver outputs controlled by I2C to an Arduino Uno/R3 (or clone). The shield is fully assembled and ready for use...Read More…
This stackable card provides an easy way to add 16 discrete power driver outputs controlled by I2C to an Arduino Uno/R3 (or clone). The shield is fully assembled and ready for use.
NOTE: There is a continuous current limit of 6 Amps for the PCB - that is due to the trace width and individual driver IC wattage limitations. User should determine current use and design accordingly. Additional heat sinking and/or a fan would be required for continuous high current operation.
The shield uses the Arduino I2C interface (also referred to as TWI, for Two Wire Interface) for operation and there are 8 addresses the card can be set to. That means you can stack 3-4 cards to add multiples of 16 power outputs without using all of the Arduino's digital pins. The shield uses only 2 pins for I2C control and 1 additional pin if you disable the drive outputs under program control. The Arduino CPU card, which is user supplied, is limited to powering about 300 milliamps - a serious limitation in applications needing drive power. The driver shield is organized as two 8-bit ports, with each port powerable from an external source. This means you could apply 12 volts for port A and 5 volts to port B (as I have done in the video). A jumper wire (on TB2, a 4-pin terminal block) allows the use of a single external voltage for both ports.
An application for the EKT-1016 would be in running a 'state machine', where a high current drive is needed on a few outputs at a time. An example would be to use the EKT-1016 shield with an Arduino UNO to control a 16 valve sprinkler system.
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