Do you know that uneasy felling in the pit of your stomach when you’re about to put voltage on an expensive piece of equipment and you’re NOT 100% sure "this is the right way to do it"? You realize that you may be moments away from filling the workshop with a cloud of green (the color of money) smoke! You also know that if you don’t do this you will never know if it works because, it’s not going to start by itself… OR, you can first consult the guys at MEL PICBASIC Forum and perhaps someone may be able to guide you through the mine fields. If you still go up in smoke you may be able to find one sympathetic soul somewhere on the face of the glob that will share your pain, NOT likely, BUT perhaps someone else will learn some small lesson from the experience of your smoldering carcass…

My new GLCD from china, of course has very little documentation. It is not clear how to handle the LED’s or Vo. Vee is at -23V. The data sheet says:
Vdd-Vss 4.75-5.25V
Vdd-Vo 4.5V to 30V
I am (almost) sure a 10K pot between Vee (-23V) and Vo should make it work. I am not sure about the LED’s. In fact I can’t find out the difference in function between the LEDA and LEDK or why the one page data sheet shows a resistor between a back light block and LEDA while there is no resistor for LEDK. ANY INPUT WILL BE APPRECIATED !

Using an 18F45K22 at 16Mhz internal, JHD639 320240 GLCD w/D1370002A1 controller , my code is almost done. I have followed Robert’s SED1335 example, thanks Robert, as the coding is very close for each controller though the 137000 seems to be a bit more involved.

Wayne