On the pin header for the external (front panel) connector on the SD circuit board one pin is labeled LCD_BACKLIGHT in the manual.
Is this for the addition of a button to turn off and on the backlight?
I have ran the power for the backlight off of the +5v drop on the pin header since no voltage is going to that LCD_BACKLIGHT pin.
Thanks for the info
External connector question
Re: External connector question
hello
1. LCD_BACKLIGHT_CTRL from PIC (pin7) feeds through R31 resitor Q3 tranzisotr and operates the presence of backlight. Simple and effective
It is my first test to se if the pic was programmed correctly - if there is no backlight, pic is wrong programmed.
how to understand manual info about header :
- try to connect 16pin header BUTTON_UP with gnd. OK - what happens ?
all i mean, gnd is common in that header
ps. please, if You do not have some experience - do not play with soldering iron...it may cost you money and us precious time.
1. LCD_BACKLIGHT_CTRL from PIC (pin7) feeds through R31 resitor Q3 tranzisotr and operates the presence of backlight. Simple and effective
It is my first test to se if the pic was programmed correctly - if there is no backlight, pic is wrong programmed.
how to understand manual info about header :
- try to connect 16pin header BUTTON_UP with gnd. OK - what happens ?
all i mean, gnd is common in that header
ps. please, if You do not have some experience - do not play with soldering iron...it may cost you money and us precious time.
..... Atari Roxxx !!!
Guess you misunderstood me. I am talking about pin 10 on the front panel connector. Yes I understand how a basic switch works by connecting it to ground.
"ps. please, if You do not have some experience - do not play with soldering iron...it may cost you money and us precious time."
Just a suggestion that before you start telling people to not use a soldering iron maybe you should lighten up. I was trying to ask a simple question but instead got an insult. I thought maybe other people here might have had the same question, if not then I apologize to those people.
"ps. please, if You do not have some experience - do not play with soldering iron...it may cost you money and us precious time."
Just a suggestion that before you start telling people to not use a soldering iron maybe you should lighten up. I was trying to ask a simple question but instead got an insult. I thought maybe other people here might have had the same question, if not then I apologize to those people.
insult ? Where ? do not be so fragile 
do not take it like that. just want to inform You, if You burn PIC there is no other way like get new one programmed. Postages costs and warranty doesn`t include burnt PICs change.
and i did UNDERSTAND You well.. i explained You the way backlight works, and in this moment You should know that SWITCH THERE MUST NOT be put.
with no offence of course, but i have had few of problems with people playing with "NOT PROPER" soldering irons and BURNT PICS TO DEATH .
Even me burnt few pieces at the beginning using inproper tools
do not take it like that. just want to inform You, if You burn PIC there is no other way like get new one programmed. Postages costs and warranty doesn`t include burnt PICs change.
and i did UNDERSTAND You well.. i explained You the way backlight works, and in this moment You should know that SWITCH THERE MUST NOT be put.
with no offence of course, but i have had few of problems with people playing with "NOT PROPER" soldering irons and BURNT PICS TO DEATH .
Even me burnt few pieces at the beginning using inproper tools
..... Atari Roxxx !!!
Re: External connector question
This is an open collector driver.gsargent wrote:On the pin header for the external (front panel) connector on the SD circuit board one pin is labeled LCD_BACKLIGHT in the manual.
Is this for the addition of a button to turn off and on the backlight?
I have ran the power for the backlight off of the +5v drop on the pin header since no voltage is going to that LCD_BACKLIGHT pin.
Thanks for the info
The connection to use is :
+5V pin -> (Anode-Backlight Led-Cathode) -> LCD_BACKLIGHT pin
lotharek,
Sorry didn't mean to snap like that. Bad day for me and I just took it the wrong way. Please accept my apology
Ok looks like I just need to do a bit of rewiring. I had it as follows
+5V pin -> (Anode-Backlight Led-Cathode) -> GROUND pin
Thanks Jeff for a fantastic design and thanks lotharek for a quality made product.
Sorry didn't mean to snap like that. Bad day for me and I just took it the wrong way. Please accept my apology
Ok looks like I just need to do a bit of rewiring. I had it as follows
+5V pin -> (Anode-Backlight Led-Cathode) -> GROUND pin
Thanks Jeff for a fantastic design and thanks lotharek for a quality made product.