Hand Held Binary Calculator
The binary calculator would functionally resemble a hand-held arithmetic calculator. This
calculator will take only binary numbers and arithmetic operations as inputs from a
simple keypad. The outputs from this device will be visible in both binary and decimal
form on a series of numerical LED displays. This calculator can perform binary to
decimal conversion, binary addition, binary subtraction, binary multiplication, and binary
division. The results of all arithmetic operations will be displayed in both binary and
decimal form with limited precision. If time allows more functions may be incorporated
in this design. A simple microprocessor will manage the inputs/outputs and perform all
relevant calculations. Since this is a hand-held device power will be provided through a
battery system.
Moisture Controlled Automated Sprinker System
The sprinkler system will use a moisture detection system, either pre-built IC or DIY,
implanted into the soil near the sprinkler head. The moisture sensor will output logic
high when the moisture level is too low and logic low when the soil moisture is
sufficient. This input will feed into the microcontroller housed in a base station located
somewhere easily accessible near a wall outlet. When the microcontroller takes in a logic
high output from the moisture sensor, it will output logic high to a relay and open the
water valve, allowing the sprinkler to turn on. When the microcontroller takes in a logic
low output from the moisture sensor, it will output a logic low to the relay and close the
water valve, shutting off the water system. The microcontroller will have multiple inputs
and outputs allowing multiple moisture sensors and relays to be attached so that it can
cover a larger area with a single base station. The system will be powered with an AC
wall adapter to provide power to the base station, relays, and moisture sensors.
Proximity Sensor Cat Food & Water Fountain
The proximity sensor cat food and water fountain will make taking care of your feline
friends a breeze. There will be a bowl and container for food as well as a bowl with a
small tank that hooks up to your sink for water, each with its own proximity sensor. As
the cat walks up each sensor will first check to see if there is anything in the bowls, if
there isn’t then a small amount of food and/or water will be released into the bowls. Your
furry little friend will always have fresh food and water. A microcontroller will
communicate with the sensors and respond accordingly. This will be powered through the
AC wall outlet and it will also have a battery backup.