Step Four-Respond. When you reply to a question, direct your answer to both the questioner and other members of the audience. Try to keep your responses as focused as possible. This will help keep them brief and preserve space for other questions.
Battery Pack 7.2v Tamiya. RC 7.2v Battery Pack 6 Cell Tamiya Connection 1800mah to 3000mah +. Designed to fit RC 7.2v battery compartments / holders on rc cars / buggys and trucks 1/10 scale and a few 1/8 scale models. Also used in many starter boxes and roto (electric) starters for nitro models.
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.