This is a 5x7 dotmatrix that i bought from sayal: http://www.sayal.com
the description is wrong so i think the manufacture is too
ELM1157AE
the description is wrong so i think the manufacture is too
ELM1157AE
yep ill do that but notice that 14 pins and 12 rows and collums (5 + 7) so what are the other pins?One set of pins will be common across each row of LEDs, another set common along each column of LEDS.
When you put power between a row pin and a column pin (with a limiting resistor), the LED at that intersection will light.
Once you find any two pins that light a LED, you should very quickly be able to move along the pins and find which set selects the rows and which set selects the columns.
i dont think its common cathode or anode because there is only 14 pins and 5*7 = 35
i dont think its that, its just silly to have more pinsUsually only one pin is necessary for the cathode. The rest are used to light up the dots.
by Aaron Carman
by Aaron Carman
by Duane Benson