Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: icoms8 on October 06, 2008, 06:52:23 PM

Title: LCD and LEDs
Post by: icoms8 on October 06, 2008, 06:52:23 PM

i need to make a poster and i was thinking of useing a LCD form herehttp://www.robotshop.ca/home/products/robot-parts/electronique-lcd/sfe-16x2-parallel-lcd-black-green.html (http://www.robotshop.ca/home/products/robot-parts/electronique-lcd/sfe-16x2-parallel-lcd-black-green.html) how do i make a messge without attching it to a robot what is a power sorce i should use. also how can i connect severl LEDs to one power source?

Title: Re: LCD and LEDs
Post by: ArcMan on October 06, 2008, 07:21:00 PM

I can tell you how I do it.  I drive the 44780 LCD parallel interface with a PIC microcontroller.  I use the CCS C compiler which has library drivers for this, making it as simple as a printf statement.  I have also done it with PIC assembly language.  What a nightmare.

If you want something more manageable, I would buy an LCD display with a serial interface.  These are readily available.  That way you can connect it directly to your PC.  Although you may need a level shifter if the display is TTL serial.

Title: Re: LCD and LEDs
Post by: Trumpkin on October 07, 2008, 12:04:50 PM

Quote

also how can i connect severl LEDs to one power source?

Connect them in series or parallel.

Title: Re: LCD and LEDs
Post by: TrickyNekro on October 07, 2008, 03:24:44 PM

I'm not here to say how...
Parallel is the way...
Just find a cheaper distributor...
I buy through my supplier from china... And displays are always good!!!

Best Regards, Lefteris
Greece

Title: Re: LCD and LEDs
Post by: dsheller on October 07, 2008, 08:43:37 PM

If you need to connect a lot of LEDs to a power supply the parallel is the way to go... but you'll face some issues. They will most likely not be the same intensity, as different LEDs have different characteristics which cause more or less current to flow through them.