Besides Nokia 5110 is there any other ultra-low power graphical LCD displays under $10 out there?
I'm drooling over Sharp Memory LCD, but they are pricey. I mean $40 is not terrible for one, but I need to get a bunch for battery powered LCD boards I'm working on I need it to last for a year on single (maximum double) AAA battery.
From my breadboard tests ATmega328p board w/ Nokia 5110 is using 140-170uA (depending on number of characters on display) when chip is sleeping which is not bad at all, but I want to explore all alternatives...
Also display must retain information on the screen (always show) when MCU is sleeping.
Size is not that important, it will show several lines of temperature/humidity...
Alas I don't know of a display that matches your requirements (price/power) and apart from an e-ink or memory LCD that updates vary rarely I don't think you will ever get one to run for a year on 2x AAA batteries.
The reflective version (without backlight) of the DOGS102 might meet your requirements. According to the datasheet, the current will be 250uA for LCD and LCD-Controller (if I interpret the datasheet correctly).
olikraus:
The reflective version (without backlight) of the DOGS102 might meet your requirements. According to the datasheet, the current will be 250uA for LCD and LCD-Controller (if I interpret the datasheet correctly).
Oliver
That's a nice one! I'll check it out thanks!
Riva:
Alas I don't know of a display that matches your requirements (price/power) and apart from an e-ink or memory LCD that updates vary rarely I don't think you will ever get one to run for a year on 2x AAA batteries.
Someone please prove me wrong though.
Yeah you could be right. Besides display I forgot that I need to keep radio module awake, that eats a lot of power. But how they heck do they do this with commercial temperature/humidity devices? I have one that's been running for 2 years on single AA battery
bratan:
Yeah you could be right. Besides display I forgot that I need to keep radio module awake, that eats a lot of power. But how they heck do they do this with commercial temperature/humidity devices? I have one that's been running for 2 years on single AA battery
My commercial module only last about 6 months on 2x AAA. It would probably last longer without the LCD to display temperature/humidity and flash an LED every time it transmits (every 30 seconds). Your doing very well with yours, must have one of them plutonium batteries.
Ok the one I'm talking about doesn't have radio, it's only indoor, but I don't remember when was the last time I changed battery in it (it's single AA), it's been at least 2 years...
Must be super low power display and micro-controller...
bratan:
Ok the one I'm talking about doesn't have radio
Then you have pretty much answered your own question.
bratan:
Must be super low power display and micro-controller.
Like any common LCD clock or watch.
Note that these do not use the highly multiplexed display system with the bias ladder of the graphical or 1602/ 2004 devices, they are generally one pin per segment so the electronics is far more efficient.
Darn. I've been searching and it seems everyone in Arduinoland uses OLEDs and TFTs. I want a 1" display that I can run off of a coin battery for a year. I know they exist, I own a bunch of them. But the best thing I've found draws 125uA.
That's a 2.2" display. I'm looking for a 1" display, like many of the little OLEDs you can buy on eBay for $5 or less. But with 1/500th the power consumption. My $10 wristwatch has a display like that.
It appears that you simply haven't weighed up the real issues. If you finally get a display with 1/500th the consumption of what ever, all you get is that but, if that is what you need, the real problem isn't the display and never was. It's the Arduino that drives it.
The 5110 that the OP originally refereed to may run at 1/500 the consumption by the simple expedient of putting a button switch in its 5v line.
I'm not planning on using an Arduino. Why would you assume that? If the display drew 20uA instead of 10mA it would still be the major consumer of current.
If you know about such a display, or any 1" LCD display, I'd love to hear about it.
AWOL:
Because you posted the question in the display section of the Arduino forum?
Fair enough. What's an Arduino? AVR (and non-AVR) chips are also discussed in this forum. But even an official Arduino board like the Pro Mini, with the regulator isolated, is capable of drawing a very low average current.
I really didn't want to get sidetracked defending my interest in finding LCDs. I just want to find them.
That's great thanks for the link! I wish it run of 3V tho, so no booster will be needed...
Guys arduino is not just uno/mega. There's ultra low power arduinos, as well as Avrs running optiboot boatloader, these are also arduinos l made board that bypasses voltage regulator and runs at 8Mhz. With 3V coin cell I estimated it will run for more than a year if it sleeps before RF transmissions (I.e. Woken up by a switch). Coin cell is not practical for larger lcds tho, AAA is more practical. I ran my Nokia display on such battery for 30-40 days. Display in the provided url should last much longer. I gotta do some math for that..
I need it to last for a year on single (maximum double) AAA battery.
