[dorkbotpdx-blabber] 2x16 LCDs - Cheap??
Jim Larson
little as $4.00! There's some for $6.00 also.
http://www.eio.com/c-163-character-lcd.aspx
Anbody dealt with these guys?
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Scott Dixon
I haven't dealt with them. The prices look good but I think the $4.00 LCD doesn't have a backlight so I would strongly suggest going with the $6.00 one which does.
-scott
brett
from EIO.
Shin-Nichi LCM-5016-67HR 2x16 Character Lcd
At $3 apiece, I was hoping for(but not really expecting) a super
bargain. It has an HD44780 driver, but the Vlcd (pin #3) which affects
the contrast requires a **negative** voltage in the 3.2-4 volt range to
get a decent contrast. Unless your circuit uses op-amps or for some
other reason you have negative voltage already on the board, it's just
not worth the hassle of using two voltage regulators. It does have an
electroluminescent backlight, but the high voltage power supply is not
built into the board and must be supplied by the user. I hooked it up
to one of my power inverters I use for EL wire, and it light up a very
pretty blue. The negative power supply requirement combined with lack
of inverter for the EL backlight makes this one impractical. I'll
probably just take some pliers to it & remove the EL panel for my
junkbox.
Seiko L1642B1L 2x16 Character Lcd Display Module
At $6, and a recognizable brand, I was expecting to use this for my
surface-mount hotplate controller. Unfortunately, the contrast is so
poor that reading the display is difficult. I tried running Vlcd down
to 0 volts, but contrast was marginal. I didn't try running a negative
voltage because the "Absolute Maximum" minimum value(does that really
make any sense??) for that pin is -0.3v, according to the data sheet.
It didn't seem to me that it would make that much difference by pushing
it to the maximum (or is that minimum??) limit, plus, even if driving it
down to -0.3v made the contrast stupendous, I'm far too lazy to mess
with a second power supply (actually, it would be the third one for the
hotplate controller) just to drive an lcd display. It does have an LED
backlight that works. Doug ordered one of these also, we'll see if the
contrast on his is any better.
It was fun and educational, but I wouldn't recommend either of these lcd
displays. For my hotplate controller, I'll probably just run out to
Surplus Gizmos and pick up a Hitachi 16x2 display(some disassembly
required):
http://www.surplusgizmos.com/16x2-LCD-Hitachi-HD44780-with-built-in-Keypad-and-Backlight_p_597.html
I've used one of these before and it's a nice little unit for only
$5.00.
Brett
Doug Ausmus
-Doug
Scott Dixon
-scott
On Apr 13, 2010, at 12:38 PM, brett wrote:
> It was fun and educational, but I wouldn't recommend either of these lcd
> displays. For my hotplate controller, I'll probably just run out to
> Surplus Gizmos and pick up a Hitachi 16x2 display(some disassembly
> required):
> http://www.surplusgizmos.com/16x2-LCD-Hitachi-HD44780-with-built-in-Keypad-and-Backlight_p_597.html
>
> I've used one of these before and it's a nice little unit for only
> $5.00.
_______________________________________________
Paul Long
time.
It's hard enough for me to carve out time to partake in my
gadget-building tomfoolery so this generous donation of your time is
really appreciated.
-pwl
On 4/13/2010 12:38 PM, brett wrote:
> Just some brief notes on the LCD displays that I ordered through Doug
> from EIO.
>
> Shin-Nichi LCM-5016-67HR 2x16 Character Lcd
> At $3 apiece, I was hoping for(but not really expecting) a super
> bargain. It has an HD44780 driver, but the Vlcd (pin #3) which affects
> the contrast requires a **negative** voltage in the 3.2-4 volt range to
> get a decent contrast. Unless your circuit uses op-amps or for some
> other reason you have negative voltage already on the board, it's just
> not worth the hassle of using two voltage regulators. It does have an
> electroluminescent backlight, but the high voltage power supply is not
> built into the board and must be supplied by the user. I hooked it up
> to one of my power inverters I use for EL wire, and it light up a very
> pretty blue. The negative power supply requirement combined with lack
> of inverter for the EL backlight makes this one impractical. I'll
> probably just take some pliers to it& remove the EL panel for my
Scott Dixon
scott
On Apr 13, 2010, at 12:40 PM, Doug Ausmus wrote:
> Thanks for the feedback Brett! :-) I haven't tried them yet, but will see if mine are any different.
> -Doug
_______________________________________________
Paul Stoffregen
brett
really care much what color or whether it's a positive or negative
display.
Brett
Monty Goodson
ordered the NewHaven from DigiKey ~ 1month ago and nothing that cheap
showed up... Now they have a bunch.
FWIW, I'm using NHD-0216K1Z-NSW-BBW-L-ND (white on blue) from DigiKey
on my hot-plate controller and it's working well.
Also, take note that DigiKey (and probably Mouser) has serial
controlled displays from NewHaven for just a couple bucks more.
Nice feedback, Brett!
Monty