Discussion in 'Raspberry Pi' started by Stitches, Nov 24, 2017.
What specific amp are you using, and with what speakers?
Ya, see, that's a 2.5w amp and a 0.5w speaker. Even at the lowest volume, it's too powerful and is going to distort and crackle. You need a 2w speaker for it to not do that.
If I use an RPI 2 max current is 650mA
With this driver board & 5inch screen:
and a 5inch screen the max current drawn is 500mA total. You can reduce that down 370mA by running the backlight at half-brightness (25mA).
Teensy 2.0 uses max 28mA.
The adafruit speaker and amp should use bugger all .
So that means with a Panasonic 3.6v 3400mah battery , I should get approx:
Approx 1200ma required from components
Therefore 3400/1200 = 2.9 hrs of battery life. ??
Using the powerboost 1000C which outputs 1.8A (adaquate as 1200ma is being drawn) it will take 3400/1000 = 3.4 hrs to charge. ??
Am I missing anything or stuffing anything up here ?
Hey, so I have a Raspberry Pi 2 Model B, and I had RetroPi installed a few years back. I've barely used it, but now that I've gotten into modding, I want to make a portable version and I noticed that there's a ribbon cable slot for a display screen. What kind of screen should I get? What's the right size? I want to make it small enough to 3D print a protective case and place it on top of my Raspberry Pi case. If you need pictures, I'd be happy to provide them. Thanks for the help, guys!
Sounds like you’re looking for something like this:
Except this uses the pi’s gpio pins instead of the dedicated display connector. I didn’t link to this one since it’s an eBay listing, but I just searched for “raspberry pi screen”. They’re pretty common.
New to both console modding and RPi here. I'm throwing together my plans for a portable machine running RetroPie on a RaspberryPi B+. I'm doing a GameCube controller layout and looking at the GC+ but I can't tell if there's USB output to solder it to one of the USB ports on the RaspberryPi board.
Alternatively I might go the Teensy route, which I have yet to know anything about, but I can't figure out which Teensy I'd need. I was planning 16 buttons (ABXY, L/R trigger, dual Z buttons, D-Pad, two Joysticks, and two extra), two analog joysticks and two analog triggers. The GC+ doesn't appear to take as many inputs.
If anyone can give me more information about either the GC+ or the Teensy so I know which I should choose, that'd be much appreciated!
You could potentially get away with using the pi's GPIO for buttons. There is no USB connection on the GC+, it is specifically made to work as a gamecube controller, not a USB one.
You can use Rpi's Gpio for game controls(the software I used is called retrogame), But if you plan to use analog sticks, you are going to want to use a teensy.
since Rpi doesn't do this without some external components
I've seen some RPi 0 projects where the RPi is soldered to a PCB (Like this project), and I wanted to how that works -like how to get video and audio out- so I can make my own PCB if I ever decide to learn how to make PCBs.
They probably used SPI and I2S for video and sound, the pinout for the header is here
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