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Raspberry Pi IO Card for Home Automation

    

    

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4-9
10+


DESCRIPTION


SPECIFICATIONS


CONNECTOR PINOUT


BLOCK DIAGRAM


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DESCRIPTION


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Raspberry Pi expansion card packed with features:

    Eight on-board relays

    Eight 12-bit ADC channels

    One 12-bit DAC output

    Eight opto-isolated inputs

    Four open drain outputs

    29 GPIOs (23 GPIOs from Raspberry Pi + 6 new)

    Four layer stackable

    Configurable interrupts

    Command line, JavaScript, Python, CODESYS

SPECIFICATIONS

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MICROCONTROLLER: STM8L151C8U6

    Operating voltage: 3.3V

    CPU frequency: 16 MHz

    Touch sensing capability

    Max. input voltage on any pin: 4V

    Series protection resistor on IO pins: 51 Ohms

    Output Low Level Voltage on I/O pins: Max. 0.45V

    Output High Level Voltage on I/O pins: Min. 2.6V

FOUR OPEN DRAIN OUTPUTS:

    Driver: ULN2003F12FN-7

    Output Low Voltage: 0.6V

    Max Pull Up Voltage: 20V

    Max sink per channel: 100mA @ 3.3V Logic Input

    140mA @ 5.0V Logic Input

    ESD: 4kV HBM, 1kV CDM

EIGHT 12 bit ADC

    Sample rate: Up to 1 Msps

    Input low pass filter: 0.22µF/51 Ohms

OPTOISOLATORS: TLP293-4

    LED current limit resistor: 1 Kohm

    Input Forward Current: Typ. 5 mA, Max 50 mA

    Input Reverse Voltage: 5V

    Input Forward Voltage: 1.25V @ 10 mA

    Isolation Resistance: Min 10 exp(12) Ohms

    Isolation Voltage: Typ 10,000 V

RELAYS: SRD-05VDC-SL-C

    Relay max current/voltage: 10A/25V

    PCB max current/voltage: 2.5A/48V

POWER REQUIREMENTS:

    60 mA @ +5V (all relays off)

    800 mA @ 5V (all relays on)

EXPANSION CONNECTOR PINOUT

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BLOCK DIAGRAM

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