A Palm-sized Propeller TouchScreen LCD

jazzed

I mentioned this in the PropTouch PropellerPlatform Handheld Kit thread.

Since I had some time today waiting for PropTouch materials, I thought I would go ahead and put this together.

1. 1.72" SPI LCD with TouchScreen and Graphics RAM
2. HB3641 Enclosure 2.74" x 2.0" (69.6cm x 50.8cm)
3. SD Card
4. 2MB Byte-wide SQI Flash
5. FT232 USB
6. FT232 Reset Enable Jumper
7. Stereo Headphone Jack
8. Propeller Protoboard 10 pin connector
9. Optional 3.3V Supply on 10 pin connector
10. Powered by USB or LiPo battery
11. Power On/Off switch

I'm open to suggestions as the design is not complete ... still looking at the LCD backlight requirements. There may be room for buttons on the side. It might be worth adding an I2C accelerometer. As you can see though space is tight.

Picture of the enclosure:



Picture of the PCB layout:



Mechanical dimensions showing LCD placement:

Cluso99

Nice

I see you have male pins protruding from the case. Since they are for output expansion and have voltage on them, would you not be better to use the standard female for this (or is it just a picture problem)?

If you intend to be able to plug into another prop, then there are two options I can recomment:
1. keep the pins subflush and when you need a connection, use a female extension with longer pins (similar to #15226)
2. use a short female (similar to #00736 but an RA version). This will then take the solder side (3mm) standard male pin stakes leaving the 6mm side for the other end.

BTW I now have female terminals tin plated (#02090) and the headers (1x4 shell #02044 and 1x7 shell #02047) for making cables if you are interested. I also have a nice AV4 pin stereo socket #18899 which I am using for TV, stereo and AV connections. I should have bought a 4pin plug too.

jazzed

Cluso99 wrote: »

Nice

I see you have male pins protruding from the case. ....

Thanks

Yes, the pins just illustrate one possibility and I don't plan to stuff them.
I figure that's a user option and users can do as they please.

jazzed

Well heck, looks like there is no touch screen on the LCD
Guess I'll have to find another solution. I'll probably try the reverse-bias LED trick.