HV Module Interface RPI Controller Ethernet Display 1 Display 2 - - PowerPoint PPT Presentation

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HV Module Interface RPI Controller Ethernet Display 1 Display 2 - - PowerPoint PPT Presentation

Jun 13, 2023 335 likes •496 views

HV Module Interface RPI Controller Ethernet Display 1 Display 2 USB User I/O 1 GPIO RCA/HDMI HV Module User I/O 2 RPI Shutdown Power On/Off RPI Programming Programming Any Choice (Typically Python or C) Interface

slide-1
SLIDE 1

HV Module Interface

Display 1 Display 2 GPIO

User I/O 1 User I/O 2

RPI Shutdown Power On/Off

RPI Controller HV Module Ethernet USB RCA/HDMI

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SLIDE 2

RPI Programming

  • Programming

– Any Choice (Typically Python or C)

  • Interface

– Ethernet for internet control – USB and Video output for direct control

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SLIDE 3

RPI Controller

  • Controlling

– Ethernet – USB – User I/O buttons

  • Hardware

– GPIO Pins (SPI and I2C compatible)

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SLIDE 4

RPI Pins

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SLIDE 5

Power

  • MAIN Power

– This will switch off the device (including the internal devices)

  • RPI Shutdown

– This will shutdown the RPI. – This needs to be done before pulling the plug.

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SLIDE 6

Display (16x2 or 20x4)

  • LCD (SPI or I2C Preferred)

– SPI or I2C control of the LCD will allow for less pins/wires

RPI direct LCD control (8 wires) RPI I2C LCD Control(2 wires)

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SLIDE 7

User I/O

  • Button Interface

– 5 Buttons:

  • UP, DOWN, LEFT, RIGHT, and SELECT

– UP and DOWN

  • Choose Channels
  • Increment Voltage

– LEFT and RIGHT

  • Choose Voltage Level

– SELECT

  • Set changes
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SLIDE 8

HV- Block Diagram

HV-MODULE EMCO H30P/H30N ADC Monitoring 0-5 V HV-OUT Raspberry 24 V Control 0-5V DAC Current measuring unit Display User I/O

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SLIDE 9

ADC/Monitoring

  • HV modules have voltage monitoring output
  • 0-5V
  • AD7923 - ADC
  • Has 4 channels
  • Needs external clock (SCLK)
  • Can be controlled via SPI
  • 4 inputs needed in total
  • 1 for Voltage/ HV Channel
  • 1 for Current/ HV Channel
  • Do we have these in stock? (Price: 6,47$)
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SLIDE 10

Current monitoring from HV line

  • Texas instruments INA110 (Instrumentation

amplifier) (Price: $13,86 )

– http://www.ti.com/lit/ds/symlink/ina110.pdf

  • AD8207(Difference amplifier) (Price: $5,67)

– http://www.analog.com/static/imported- files/data_sheets/AD8207.pdfTI ISO 121

  • TI ISO 121 (isolation amplifier) (Price: $135,86)

– http://www.ti.com/lit/ds/symlink/iso121.pdf

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SLIDE 11

http://www.ti.com/lit/ds/symlink/ina210.pdf

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SLIDE 12

iCoupler

– http://www.analog.com/static/imported- files/data_sheets/ADuM2280_2281_2285_2286.p df

  • Price: $3,43

(ADuM2280)

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SLIDE 13

DAC

  • LTC2657
  • Controlled via I2C
  • 2 Channels for HV controlling
  • Do we have these in stock?
  • Price 35,28$
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SLIDE 14

HV-Module

  • Power range?

– EMCO has max 15W

  • Ultravolt has modules with voltage and

current monitoring

– http://www.ultravolt.com/uv_docs/FSeriesDS.pdf

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SLIDE 15

Cost analysis

  • RPI

– $ 39.95 (Adafruit)

  • Display

– (16x2) SPI/I2C LCD $ 19.95 (Adafruit) – (16x2) LCD $9.95 (Adafruit) – (20x4) LCD $17.95 (Adafruit)

  • ADC

– AD7923 $ 6,47$

  • DAC

– LTC2657 $35,28

  • Icoupler

– ADuM2280 $3,43

  • OPAMP

– INA110 $13,86 – AD8207 $5,67

  • HV-Modules

– EMCO H30P/H30N $??? Probably ~$200 each

  • Estimation in total: $120+ 400 + Other components = ~$600