Binary Clock

Binary Clock displays the current time using BCD (Binary-Coded Decimal) notation rendered as a grid of LED dots. Each of the hours, minutes, and seconds values is split into a tens digit and a ones digit, and each digit is shown as a 4-bit column weighted 8-4-2-1. Lit emerald dots indicate 1 bits, dim dots indicate 0 bits, and the time updates every second.

1. Open the tool; the clock starts automatically and refreshes once per second. 2. Toggle Show Labels to display or hide the 8/4/2/1 bit weight headers above each column. 3. Toggle Show Values to display or hide the decimal value at the end of each row. 4. Read the live time from the large HH:MM:SS readout at the bottom, where the colon separators pulse each second. 5. Each row is labeled H, M, or S and is split into two 4-dot groups (tens then ones).

Each time component is encoded as two separate decimal digits rather than a single binary number, so the tens and ones groups each range only 0-9 and the 8-bit is never lit for the ones place of seconds or minutes (max 9). The bit extraction uses bit shifts: bit 3 (8), bit 2 (4), bit 1 (2), bit 0 (1). For example, a tens digit of 5 lights the 4 and 1 dots, while a value of 0 leaves all four dots dim.