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evnow
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A bigger display for the SOC Meter

Sat Jul 23, 2011 7:38 pm

I've been looking for a bigger display for the SOC meter/gauge. The LED display that is used now is 12x40 mm with 4 characters. The idea is to take Gary's SOC software and modify it to make it work with the bigger display in an open source effort.

Must have for the bigger display are
- It must have serial interface
- Libraries for AVR needed in case the display is not a character display (i.e. the display is a graphic one)
- A reliable supply i.e. not a one off unit on e-bay.

Nice to have
- The bigger the better. 16x2 LCD is what I'd consider the smallest.
- The cheaper the better. $50 delivered is the highest I think we should look for.

Ideas ?

The candidates, so far.

1. Sparkfun 16x2 character LCD adapted for serial interface $24.95

Comes in different colors. 71.4x26.4mm.

http://www.sparkfun.com/products/9395

Image

2. Sparkfun 20x4 character LCD adapted for serial interface $29.95

Black on Green only :( 87.3 x 41.8 mm.

http://www.sparkfun.com/products/9568

3. Sparkfun Graphic LCD 128x64 adapted for serial interface $34.95 (out because it needs 6 to 7V input)

The firmware by SparkFun isn't too good - but difficult to update the firmware. 65x35 mm ?

http://www.sparkfun.com/products/9351

4. Sparkfun Serial Miniature OLED Module 0.96" $39.95

This would be very nice. It even has a microSD that can be used for logging ! The problem is it is very small - Display Area: 20mm x 14mm.

http://www.sparkfun.com/products/8538

5. 132x132 Serial Color Graphic LCD - $35.99

This is the very popular color LCD used by Nokia in 6610 phone. Display is 30 mm x 30 mm (so more than twice the size of OLED above). Works well in day light (like the Nokia phone does). LCD is made by either Epson or Philips.

They are available from multiple sources and on e-bay. For eg. from gravitech.

http://www.gravitech.us/13secogrlcd.html

The LCD is available for $15 from sparkfun or even lesser on e-bay. But it takes 3.3V and can be difficult to solder. So, a breakout board that takes 5V directly from AVR makes it easy for $20 more.

There are a lot of different libraries available to drive the display.
1st Leaf : 2/28/2011 to 5/6/2013
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evnow
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Re: A bigger display for the SOC Meter

Sun Jul 31, 2011 8:39 pm

I've bought 2 displays. Will see how they work. I'll probably put out the code for both the displays.

1. New Haven : NHD-0216S3Z-FL-GBW - 2x16 Characters, STN-GRAY, Y/G LED backlight, Transflective, SPI & RS232

Important factor was that it has big characters - almost 1 cm tall compared to 0.5 cm for other LCD displays.

http://www.newhavendisplay.com/index.ph ... cts_id=446

I bought it from onlinecomponents.com for $17.50 + shipping.

http://www.onlinecomponents.com/new-hav ... p=37682558

Image

2. Nokia 6100 / 6610 Color LCD (PCF8833) Module : 128x128 mini color LCD

From ebay for $16.99. But this is coming from China and will take 2 or 3 weeks to land.

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0553758987
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garygid
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Re: A bigger display for the SOC Meter

Sun Jul 31, 2011 9:40 pm

#1 looks nice, has bigger characters, and is easy to interface (TTL "RS232" = UART).
Please let us know how it looks in the sunshine.

It has a large display, but it is about 5" long, requiring a "large" project box, or mounting the display seperately. Mounting this display higher might be needed because of its limited (10º) viewing angle from above (60º from below, 45º on the sides).

Also, it draws almost 400 ma (about 5 watts from 12v).
See SOC/GID-Meter and CAN-Do Info
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evnow
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Re: A bigger display for the SOC Meter

Sun Jul 31, 2011 10:09 pm

garygid wrote:Also, it draws almost 400 ma (about 5 watts from 12v).
Should be 2w - since it is a 5V lcd.
1st Leaf : 2/28/2011 to 5/6/2013
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garygid
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Re: A bigger display for the SOC Meter

Sun Jul 31, 2011 10:56 pm

Yes, but 5w (6w) if you need to regulate 12v (14v) down to 5v.
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
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palmermd
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Re: A bigger display for the SOC Meter

Tue Aug 23, 2011 7:45 am

I somehow linked to this site and found this. I have no idea if it would work for what you guys are doing, but I thought I'd post it here FYI. Seems like a few buttons might be nice for navigating a few screens on the SOC meter.

http://www.mini-box.com/picoLCD-256x64- ... -CDROM-Bay

Image
Michael

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Driving electric since 1996


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garygid
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Re: A bigger display for the SOC Meter

Tue Aug 23, 2011 8:07 am

At 5.39" wide, it might be difficult to put in a box that would fit well on the shelf below the Nav screen.

I tried to keep to lower power, easy to package, and larger, easy to see characters.
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
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TomT
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Re: A bigger display for the SOC Meter

Tue Aug 23, 2011 8:12 am

It's designed to fit a standard 5 1/4" Computer case slot...
palmermd wrote:I somehow linked to this site and found this. I have no idea if it would work for what you guys are doing, but I thought I'd post it here FYI. Seems like a few buttons might be nice for navigating a few screens on the SOC meter.
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
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Smidge204
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Re: A bigger display for the SOC Meter

Tue Aug 23, 2011 8:41 am

You could always have something like this stickin' out the top of the dashboard:

Image

:lol:
=Smidge=

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garygid
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Re: A bigger display for the SOC Meter

Tue Aug 23, 2011 12:20 pm

A Retro-Style display from the before-times ... I LIKE it! :D
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
Craigslist: Xm5000Li Electric Motorcycle

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