Depending on the size of your garage and its location, the garage door is anywhere from 20% to 100% of the faÃ§ade of your house. That is a lot of space. Adding a garage door that is a step up from a basic, white, builderâs grade garage door can add a lot of value to your home.
This is a bit complex. Basically, there are a number of limiting factors: The IO lines from the microcontroller (i.e. the analog and digital pins) have both an aggregate (e.g. total) current limit, and an per-pin limit: However, depending on how you define the Arduino Pins, this is not the entire story. The 5V pin of the arduino is not connected through the microcontroller. As such, it can source significantly more power. When you are powering your arduino from USB, the USB interface limits your total power consumption to 500 mA.
The DS1302 can be easily connected to the Arduino. Three pins are needed for the interface (CE, I/O, SCLK), and Vcc2 should be connected to +5V (or +3.3V). The Vcc1 is for a battery or a rechargable battery or a supercap. A crystal of 32.768kHz should be connected to X1 and X2. The DS1302 will run with a voltage from 2.0V to 5.5V. The three pins for the interface should avoid to use the internal pull-up resistors of the Arduino.