Crowpi2 hardware in pictures

A place to discuss any hardware issues you are having with your CrowPi
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wizzy
Posts: 16
Joined: Wed Nov 04, 2020 5:43 pm

Crowpi2 hardware in pictures

Post by wizzy »

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Switch (I think) disconnects I2C from Pi.

Screen driver - converts HDMI to screen.

Fan - right above naked SoC on Pi board.

Led indicators on all Pi connector pins.

Relay
wizzy
Posts: 16
Joined: Wed Nov 04, 2020 5:43 pm

Re: Crowpi2 hardware in pictures

Post by wizzy »

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Chip next to 7Seg is HOLTEK-HT16K33 - all-in-one LED-multiplexer / key matrix scanner + debouncer that talks I2C to the Pi4, and handles the 7 seg display, the 8x8 led colour display, and the 4x4

SPI / CE1 to Rocker ?

GPIO to PIR, Sound detector - not entirely sure what GPIO28 is doing.

Ultrasonic - Trig and Echo

Tilt and Temp / moisture on GPIO pins
Power conditioning at the top.
wizzy
Posts: 16
Joined: Wed Nov 04, 2020 5:43 pm

Re: Crowpi2 hardware in pictures

Post by wizzy »

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Top has Analog in, UART out.

I2C on connector.

Servo connector.

Stepper connector - drivers below it.

Buzzer - and PIR circuitry ?

Vibration, Sound, Touch.

8x8 colour matrix

4x4 button pad - quite sturdy.
wizzy
Posts: 16
Joined: Wed Nov 04, 2020 5:43 pm

Re: Crowpi2 hardware in pictures

Post by wizzy »

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16x2 LCD display driver on I2C

Light sensor on I2C

RFID on SPI
wizzy
Posts: 16
Joined: Wed Nov 04, 2020 5:43 pm

Re: Crowpi2 hardware in pictures

Post by wizzy »

It came with power adaptors for Pi4 (USBC) and Pi3 (microUSB)

There is also a connector for HDMI - one for Pi3 another for Pi4

Tray is way too small for a battery pack - still thinking what to do about that

Fan a teeny bit noisy - maybe a heatsink on the Pi is enough - the fan pops out, I guess the heatsink would just go in its place
2600Sam
Posts: 27
Joined: Thu Jul 30, 2020 6:04 am

Re: Crowpi2 hardware in pictures

Post by 2600Sam »

"not entirely sure what GPIO28 is doing"

if it the same/similar as the original crowpi it came with a small remote control and an ir receiver (looks like a transister with a lump on the front, some have a metal case on them) plug that in to the connector and write some code and you have a functioning remote control

how good does the keyboard sit on the device (they had problems with that in pre-production, something was warrped on it)??
wizzy
Posts: 16
Joined: Wed Nov 04, 2020 5:43 pm

Re: Crowpi2 hardware in pictures

Post by wizzy »

You are right - it came with VS1838B - which is an IR receiver IC. Thanks for telling me where to put it ..

The keyboard is snug - a bit of a fight to get it out - but conversely does not drop out easily.

I am busy breaking things by making a kernel with PREEMPT_RT.

I am more familiar with Arduino - so I am keen to see how they stack up.

Cheers, Andy!
wizzy
Posts: 16
Joined: Wed Nov 04, 2020 5:43 pm

Re: Crowpi2 hardware in pictures

Post by wizzy »

Re: power supply - I have questions :-

* Is the 12V -> 5V converter on the sensor board? (I think I see power components there)
* Is it a switching regulator, or a linear regulator ?
* What is the maximum input voltage (i.e - can I put 19V into it ? Are there sensors directly connect to this supply ?)

I would like to take the case apart, but I am not sure if it comes apart from the feet, or below the keyboard.
2600Sam
Posts: 27
Joined: Thu Jul 30, 2020 6:04 am

Re: Crowpi2 hardware in pictures

Post by 2600Sam »

wizzy wrote: Tue Nov 10, 2020 10:10 am Re: power supply - I have questions :-

* Is the 12V -> 5V converter on the sensor board? (I think I see power components there)
* Is it a switching regulator, or a linear regulator ?
* What is the maximum input voltage (i.e - can I put 19V into it ? Are there sensors directly connect to this supply ?)

I would like to take the case apart, but I am not sure if it comes apart from the feet, or below the keyboard.
most of the sensors use 3.3 and 5Vdc and are usually powered from the GPIO pins (with a max current draw of about 16mA)
but Guessing with this many sensors they must be providing power for the onboard power supply!
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