Kosta
2001/09/25, 11:27 PM
Hey,
I recently purchased a CFAH1602B-TMC-JP, 16x2 STN Blue Negative Transmissive White Edge LED Backlit LCD Module. I also purchased a Wirz Serial back-pack to convert it to serial.
I was going through some posts so that I get an idea on how to go about putting this thing together, since I'm not too familiar with this stuff. I was trying to determine the value for the resistor needed, and came accross this thread on the forum - Thread (http://www.crystalfontz.com/forum/showthread.php?threadid=149). Here, it is stated that this particular LCD's backlight requires a supply voltage of 25mA at 3.3V. The maunal (http://www.crystalfontz.com/products/1602b-color/CFAH1602BTMCJP.pdf) for this LCD says it's 4.2V, if I'm reading it right. I was just wondering if this could be cleared up.
If it's 4.2V on my 5V source, I'm figuring I would need a 32+ ohm resistor. If it is 3.3V, I would go with the 68+ ohm resistor suggested in the thread above.
Thanks in advance,
-Kosta
I recently purchased a CFAH1602B-TMC-JP, 16x2 STN Blue Negative Transmissive White Edge LED Backlit LCD Module. I also purchased a Wirz Serial back-pack to convert it to serial.
I was going through some posts so that I get an idea on how to go about putting this thing together, since I'm not too familiar with this stuff. I was trying to determine the value for the resistor needed, and came accross this thread on the forum - Thread (http://www.crystalfontz.com/forum/showthread.php?threadid=149). Here, it is stated that this particular LCD's backlight requires a supply voltage of 25mA at 3.3V. The maunal (http://www.crystalfontz.com/products/1602b-color/CFAH1602BTMCJP.pdf) for this LCD says it's 4.2V, if I'm reading it right. I was just wondering if this could be cleared up.
If it's 4.2V on my 5V source, I'm figuring I would need a 32+ ohm resistor. If it is 3.3V, I would go with the 68+ ohm resistor suggested in the thread above.
Thanks in advance,
-Kosta