AMICUS18-COMPANION-SHIELD AMICUS, AMICUS18-COMPANION-SHIELD Datasheet - Page 33

Manufacturer Part Number

AMICUS18-COMPANION-SHIELD

Description

Amicus18 Companion Shield

Manufacturer

AMICUS

Datasheet

1.AMICUS18-COMPANION-SHIELD.pdf (49 pages)

Silicon Manufacturer

Microchip

Core Architecture

PIC

Core Sub-architecture

PIC18

Features

USB Interface, In Circuit Serial Programming Interface

Kit Contents

Board

Silicon Family Name

PIC

Silicon Core Number

PIC18F25K20

Rohs Compliant

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

For Use With

PIC18F25K20 Microcontroller

Amicus18 Companion Shield

Light Level Switch (Cockroach Mode)

We can use the ADC for a more practical example now that we know it works. We’ll use an LDR (Light

Dependant Resistor) as the input to the ADC, and turn on an LED when the light level drops beyond a

certain level.

An LDR, as it’s name suggests, alters it’s resistance depending on the amount of light falling upon it. It’s

one of the oldest methods of light detection, and one of the simplest of all light level detectors to use,

and one of least expensive.

And LDR layout is shown below:

Version 1.0

06-10-2009