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Crowpi2 hardware in pictures
Posted: Thu Nov 05, 2020 5:16 pm
by wizzy
- 20201105_184830.jpg (244.2 KiB) Viewed 6627 times
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
Re: Crowpi2 hardware in pictures
Posted: Thu Nov 05, 2020 5:24 pm
by wizzy
- 20201105_184940.jpg (243.8 KiB) Viewed 6626 times
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.
Re: Crowpi2 hardware in pictures
Posted: Thu Nov 05, 2020 5:28 pm
by wizzy
- 20201105_184958.jpg (205.39 KiB) Viewed 6626 times
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.
Re: Crowpi2 hardware in pictures
Posted: Thu Nov 05, 2020 5:30 pm
by wizzy
- 20201105_185012.jpg (181.64 KiB) Viewed 6626 times
16x2 LCD display driver on I2C
Light sensor on I2C
RFID on SPI
Re: Crowpi2 hardware in pictures
Posted: Thu Nov 05, 2020 5:37 pm
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
Re: Crowpi2 hardware in pictures
Posted: Sat Nov 07, 2020 9:17 pm
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)??
Re: Crowpi2 hardware in pictures
Posted: Sun Nov 08, 2020 4:22 pm
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!
Re: Crowpi2 hardware in pictures
Posted: Tue Nov 10, 2020 10:10 am
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.
Re: Crowpi2 hardware in pictures
Posted: Tue Nov 10, 2020 9:04 pm
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!