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Topic: Got a 4 digit LCD but... (Read 875 times) previous topic - next topic

CrossRoads

Check the bottom, sometimes there is enough of a part number embedded to be able to find something.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

Nick Gammon


@Nick I think OP meant it wasn't actually that model, but a 10-pin-per-side similar one


Oh I see. That picture had 20 pins per side.

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The site where I bought the display does not show any description, brand or model about it.


Doesn't sound like a bargain if you have no idea how to use it.

If you are going to buy online (as I do) I suggest you buy something that has Arduino support. Stuff like the displays from Adafruit, Sparkfun, etc.

dhenry

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No idea how to do it


Use your arduino to generate a (roughly) 100hz signal. Take the GND (or VCC) pin and the signal pin, and apply them to any two pins on the lcd.

As you slide around the signal pin, and see lots of segment liting up, the GND pin is on a com.

Rookie2


Quote
No idea how to do it


Use your arduino to generate a (roughly) 100hz signal. Take the GND (or VCC) pin and the signal pin, and apply them to any two pins on the lcd.

As you slide around the signal pin, and see lots of segment liting up, the GND pin is on a com.


Thank you. Luckily I managed to get the datasheet from the store!

terryking228

Hi,
Let us know how it works out...

If you get to feel it's too much trouble and way too many pins to control, think about only 2 pins on an I2C controlled display like these:
http://arduino-info.wikispaces.com/LCD-Blue-I2C
Regards, Terry King terry@yourduino.com  - Check great prices, devices and Arduino-related boards at http://YourDuino.com
HOW-TO: http://ArduinoInfo.Info

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