[Help] [First Project] Building a Pi3 based gaming handheld

[Nachorl250]

Hi everyone! First time poster!

So I'm planning on building a handheld gaming console as my first RasPi project and have a bunch of questions.

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My planned hardware so far is:

Raspberry Pi 3 model B

Waveshare 5" 800*480 screen (not gonna use the touchscreen functionality)

3.7V cellphone battery

2 PSP analogue sticks, used in the Pi through a Adafruit MCP3008 Analog to Digital Converter

2 generic tiny speakers for stereo sound (don't need too much volume)

3.5mm headphone jack (using an extension, not the one from the Pi. I plan on using one of those with a built in switch so that if there are no headphones connected the signal goes to the speakers)

3D Printed case

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So my questions are:

1) How thick is the screen-Pi combo when mounted together? This machine is supposed to be portable and all data I can find is length and width.

2)How can I do to power the Pi (5V) and charge the battery? The PowerBoost 500C and 1000C would be perfect solutions if their output was more than 1A. I saw a thread recently from a guy who measured the Pi 3's power consumption while gaming and got 600mAh or something like that as a result. Was that true?

3) Is there an alternative to the
Adafruit MCP3008 Analog to Digital Converter I can use? That one has 8 channels (theoretical support for 4 analog sticks) while I would need half of that (4 channels - 2 sticks)

4) What are your suggestions to make this build as slim and cheap as possible? An specific way of arranging the parts? Would slimming down the Pi help or would it be useless since it's gonna be attached to the screen anyways? Any help is welcome

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Thank you a lot in advance for reading!!! I'm really lost right now.

[owatnext]

There's a chip called MCP3004. I believe it handles two joysticks.

I do think that if you need more room, slimming down the Pi is a really good option. Say, if you only need two USB ports and no Ethernet jack, just go ahead and remove that you don't need. Same if you don't need HDMI.

Good luck.

[Nachorl250]

There's a chip called MCP3004. I believe it handles two joysticks.

I do think that if you need more room, slimming down the Pi is a really good option. Say, if you only need two USB ports and no Ethernet jack, just go ahead and remove that you don't need. Same if you don't need HDMI.

Good luck.

Thank you for your help! I'll check the MCP3004 and probably slim down the Pi.