Inexpensive ultra low power LCD

Other Hardware Displays
21

Paul is right. In fact I think you do a little better to go full speed in that case. Lower voltage and minimum active/sleep duty cycle can buy a lot of battery time though. With the display removed or in sleep mode my breadboarded setup would last years on a CR2032. With the display on, maybe two months.

I'd really like to keep it on 24/7, just like a $10 watch. But it seems that technology isn't available to hobbyists.

This is the display I've been experimenting with. I don't really need the graphics capability but it's the only thing I've been able to find this size that doesn't draw 5-10mA.

22

jboyton:
it's the only thing I've been able to find this size that doesn't draw 5-10mA.

It looks like it's time to read the original post gain. I recall the 5110 draws 1mA max.

23

Nick_Pyner:
It looks like it's time to read the original post gain. I recall the 5110 draws 1mA max.

I'm familiar with the 5110. I have one. But it's not a 1" display either.

0.96" OLED, 1.0" LCD and Nokia 5110:

24

Nick_Pyner:
It looks like it's time to read the original post gain. I recall the 5110 draws 1mA max.

Less. I found 140-200 uA and that's together with Atmega328p.

25

I see you found it varied. I understood it was 1ma with all dots black. I think that was on some other forum. I don't think the 5110 is all that flash for graphics anyway, which is why I raised the matter, but it seems that size is actually more important than power consumption here.

26

I got the impression bratan was originally more interested in low-power than small size. I want both.

I haven't experimented with the 5110 too much. It's so clunky and the 84x48 resolution is limiting. That 1" LCD is 128x64. The number of black pixels doesn't seem to matter that much. I measured 130uA with all pixels on and 118uA with all pixels off.

27

OK.. i'll wait to see that clock speed is importaint...

28

knut_ny:
OK.. i'll wait to see that clock speed is importaint...

While you wait (at 100kHz), I'll sleep (at 0Hz).

29

bratan:
Less. I found 140-200 uA and that's together with Atmega328p.

Did you ever find a suitable display? I've been playing with the UC1701 (128x64) and HX1230 (96x68). Both are above your energy limit, but I haven't found anything lower.