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Topic: Where can I find gray LCD (like the one in a calculator) (Read 830 times) previous topic - next topic

szangvil

I am looking for a very cheap LCD like the ones install in calculators or something like this.
What are they called? Can they be connected easily to an Arduino?

arduinohabib

You mean a seven segment LCD display like this:
http://il.farnell.com/productimages/nio/standard/3767492.jpg
What is man's best friend? The breadboard!

Quick5pnt0

Try searching for "LCD" on adafruit.com or sparkfun.com or "lcd arduino" on ebay. Just make sure it is Hitachi HD44780 compatible so it'll be easily connected to the arduino.

szangvil

All I can come up with are the LED 7 segment type (1,2,3 or 4 digits)...

arduinohabib

Like this?
http://www.ebay.com/itm/LCD5663R-25H-IEE-Seven-Segment-Numeric-LCD-Display-NEW-2-75-x7-8-/370290491980?pt=LH_DefaultDomain_0&hash=item563708824c
What is man's best friend? The breadboard!

smeezekitty

http://www.ebay.com/itm/8-DIGITS-7-SEGMENT-LCD-DISPLAYS-GLASS-2-PCS-/320778989149?pt=LH_DefaultDomain_0&hash=item4aafeaee5d

They are not really easy to interface. They have loads of (possibly multiplexed) lines.
You will need to expand the output ports or get a controller IC.
Avoid throwing electronics out as you or someone else might need them for parts or use.
Solid state rectifiers are the only REAL rectifiers.
Resistors for LEDS!

dhenry

Quote
Where can I find gray LCD (like the one in a calculator)


From a calculator?

I buy cheap calculators from Walmart and take them apart. They go for about $1 each.

The issue with those types of calculators is that the ribbon is not solder-able. They are instead taped to the pcb. So your own option is to sand away the paint and then solder fine copper wires to the traces on the pcb.

But otherwise it works like a charm.

You can reuse the keypads + casing too.

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