Modify Existing Raspberry Pi Compute Module 4 io Breakout Board (KIKAD 6 nightly build required ) Shematic + Board [login to view URL] only bid Actual Amounts

Job Description:

Modify Compute Module 4 iO Board

I would like to change the Compute Module 4 io board to suit my project . Design must be done in Kikad 6 ( nightly build required as described

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Designfiles can be found here :

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Delete the following parts from the current design :

• GPIO Header

• Remove 2nd DSI connector

• Remove 2nd HDMI connector

• Remove SD Card reader

• Remove both Camera connectors

• Remove GPIO Header

• Remove PCI Express

• Remove POE Header

• Power Supply Barrel Jack

Add the following to the board :

• Main Breakout Connector 34 Way Connector (Amp Superseal 2-6447232-3)

• 2 CAN bus Modules (Adapt the schematic from the PI Hat in the files to suit the Pi4 Compute module )

CAN High and Low for both modules should be broken out to the main connector described below The jumpers (J1 and J2 ) to set the 120 Ohm resistor active should be each broken out to the main 34 pin connector so they can be set by bridging 2 pins on the main 34 pin connector

• Add a connector on the board to directly plugin this Neo M8N GPS board ( GND 3.3V RX Tx)

• Add a 8 Channel ADC (MCP 3008) so I can read in Analog Voltages 0-5V ( Break out the inputs to 34 pin main connector ) Also add overvoltage protection for the inputs

• Add a circuit so I can read in 6 digital inputs ( Based of 12 V 12v on 0v off add overvolt protection ) ( Break out the inputs to 34 pin main connector and )

• Modify the Power supply circuit in the following manner :

Input comes from a 12 V Car battery (Permanent 12 V and Switched 12 v via ignition coming from 34 Pin main connector )

There needs to be a voltage stabilisation to prevent having Power Cuts when the voltage drops during cranking of the Engine.

Have 2x 12 V inputs . One is permanent 12 V the other one is a switched input from the Ignition .

The Board should be powerd via the permanent 12 V but only when ignition is on . When there are 12 v on the ignition wire a GPIO pin should be set to high and power should be supplied via the Permanent 12 V input . When the ignition wire is off . the GPIO should go to low and the 12 V Power from the permanent 12 V should be cut with a 10 seconds time delay

( this way I can monitor the GPIO state via software and trigger a safe shutdown to prevent file system corruption )

• Add 4 connectors on the board connected to 4 GPIO pins ( 2 pin connectors with the other pin connected to 3.3V so I can connect some switches to those connectors to switch pins to switch GPIO to while pressing )

Add one big central 34 pin Connector with the following inputs outputs

Connector Type : Amp Superseal 2-6447232-3 :

• 12 V Switched input ( 12 V from ignition )

• 12 V Permanent input (12V from Car battery)

• 1x Main Ground

• CAN 1 High

• CAN 1 Low

• CAN 2 High

• CAN 2 Low

• 2 pins that can be bridged to close the connection of the 120 Ohm Termination ResistorCAN1

• 2 pins that can be bridged to close the connection of the 120 Ohm Termination ResistorCAN2

• 12 V Switched input ( 12 V from ignition )

• 12 V Permanent input (12V from Car battery)

• 1x Ground

• 8x Analog 0-5V inputs ( with some protection in case 12 V is accidentally applied )

• 1 communal ground for Analog inputs

• 6x Digital inputs ( 12 V inputs that can set the 6 differen GPIO’s to high (need to be converted to 3.3 V)

• 1 x SDL out

• 1x SDA out

• 1 x 5V out

• 1x Ground out

Kĩ năng: PCB Layout, Vi điều khiển, Thiết kế vi mạch

ID dự án: #27872284