Files
Last update 2 years 2 months
by
G.Raf
| FilesPCBdocs | |
|---|---|
| .. | |
| matrix.csv | |
| matrix.txt | |
| matrix_bom.pdf | |
| matrix_pcb_bot.pdf | |
| matrix_pcb_bot_old.pdf | |
| matrix_pcb_top.pdf | |
| matrix_pcb_top_old.pdf | |
| matrix_schema.pdf | |
| matrix_schema_old.pdf |
matrix.txtI=20mA U=2.2V R_5V=U/I=(5V-2.2V)/20mA = 140 Ohm R_3V3=U/I=(3V3-2.2V)/20mA = 55 Ohm DOTS (7*5=35) Refresh Rate -> 50Hz Min-Timer Frequency = 50*35=1750 Hz Density Control 1-16 Timer-Frequency = 1750 Hz * 16 * 2 = 56 kHz