Scroll pHAT HD Rectangle Watch

This is a base 12 watch using raspberry pi zero and Pimoroni Scroll pHAT HD.

Hardware

• Raspberry Pi Zero WH
• Pimoroni Scroll pHAT HD

Optional

• Pibow Zero Case

Power

With USB connection, it use 0.05A to 0.08A at 4.92V.

Time

• Hours: converted to 12 hour, hour starts from 0 to 11.
• Minutes: divided by 5 then add 0.5 and convert the number to an integer.
• Seconds: divided by 5 then add 0.5 and convert the number to an integer.
• If you have problem with NTP, port block or ISP block, use HTTP Time protocol.

Example of time:

• 12:45:25 = 12:9:5
• 19:29:33 = 7:6:7

Setup

• Raspberry Pi Zero Headless Quick Start
• Scroll pHAT HD installation

Code

get_loc function takes x starting point and the number needed to be shown, return the location of the dot. show_time function to create 3 dim rectangle and call get_loc to get location of hour,minute and second.

Reference

• Scroll pHAT HD Documentation
• How to Set the Time and TimeZone on the Raspberry Pi