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--- anchordemo [2021/06/07 19:35]
dpisuperadmin [Peripheral and Hardware Selection]
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-====== Anchor Demonstration Board ======
-==== Introduction ====
-Anchor Electronics sells a selection of new and surplus Demand Peripherals boards.
-The project described on this page gives Anchor customers a quick, visual
-introduction to the Demand Peripherals product line and and open-source peripherals.
-==== Overview ====
-{{ ::anchordemo.jpg?200|}}This page is organized as follows:
-  * Peripheral and hardware selection
-  * Physical construction and wiring notes
-  * Linux configuration
-  * Applications
-    * distance
-    * rgbled
-    * demomotor
-==== Peripheral and Hardware Selection ====
-Our goal was to give Anchor customers a simple demonstration of the capabilities of the Demand Peripherals software defined peripherals. There are three separate applications running on the demo system.
-The first  is an ultrasonic distance sensor whose reading are displayed on a 6 digit LCD.  The distance is shown in inches and tenths of an inch.  We use the us8 peripheral ([[http://exampldemandperipherals.com/peripherals/us8.htmle.com|us8]]) and card ([[https://demandperipherals.com/cards/us8.htmlh|us8]]).  The distance is shown in inches using the lcd6 peripheral ([[http://https://demandperipherals.com/peripherals/lcd6.html|lcd6]]) and the lcd6 card ([[http://https://demandperipherals.com/cards/lcd6.html|lcd6]]). The sensor is an Adafruit HC-SR04 ([[https://www.adafruit.com/product/3942|HC-SR04]]).
-The second application uses a quad slide potentiometer peripheral ([[https://demandperipherals.com/peripherals/slide4.html|slide4]]) and card ([[https://demandperipherals.com/cards/slider4.html|slider4]]) to control the red-green-blue brightness of a string of eight WS2812 LEDs from Adafruit ([[https://www.adafruit.com/product/1426|NeoPixel Stick]]).
-The third application uses a rotary encoder to control the speed and direction of a DC motor.  The RPM speed of the motor is displayed on a second 6 digit LCD.  The rotary encoder peripheral and card are the rotary encoder interface ([[https://demandperipherals.com/peripherals/roten.html|roten]]) and the rotary encoder card([[https://demandperipherals.com/cards/roten.html|roten]]). We use a DC gearhead motor from Adafruit ([[https://www.adafruit.com/product/4416|Geared DC Motor]]).  The motor is controlled with the dual DC motor controller peripheral ([[https://demandperipherals.com/peripherals/dc2.html|DC2]]) and the dual H-bridge card ([[https://demandperipherals.com/cards/d7hb.html|d7hb]]).  The motor has a magnetic quadrature encoder to measure the speed.  The encoder outputs go to a general purpose IO card ([[https://demandperipherals.com/cards/gpio4.html|gpio4]]) and from there to a dual quadrature decoder peripheral ([[https://demandperipherals.com/peripherals/quad2.html|quad2]]).  A second LCD6 card and peripheral display the speed of the motor in revolutions per minute.

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