diff --git a/public/Ohmpi_V2_00/V2_00_step_02.html b/public/Ohmpi_V2_00/V2_00_step_02.html index 3b2db4300821cb523f44bb2408fbb3fa1756e399..89405fa589a78508f94c6124ae83f78f197c4ef1 100644 --- a/public/Ohmpi_V2_00/V2_00_step_02.html +++ b/public/Ohmpi_V2_00/V2_00_step_02.html @@ -325,7 +325,11 @@ We have developed a complete “plug and play†measurement board. To measure e two ADS1115 were used,one for the voltage measurement one for the current measurement, as proposed by Florsch [7]. The ADS1115 is a 16-bit ADC (Analog-to-Digital Converter), with an adaptable gain. The advantage of ADS1115 is that the input signal value could lie between - to + 6.114 V. For the current measurement we have directly integrated the INA282 component, -which allows to realize precise current measurement around a shunt resistor. The assembly steps are described in the following steps:</p> +which allows to realize precise current measurement around a shunt resistor. The assembly are described in the following steps:</p> +<div class="admonition note"> +<p class="admonition-title">Note</p> +<p>In this version, We used a shunt resistor of 2 ohms, which limits the current measurement to 48 mA. If the current is higher than this value, you just have to decrease the value of the shunt resistor.</p> +</div> <table class="docutils align-center"> <colgroup> <col style="width: 12%" /> @@ -947,7 +951,7 @@ on the ground terminal.</p></td> </td> </tr> <tr class="row-even"><td><p>Run Ohmpi_4elec.py, if everything works you should -get the following result</p></td> +get the following result (220 ohm)</p></td> </tr> </tbody> </table> diff --git a/public/Ohmpi_V2_00/V2_00_step_03.html b/public/Ohmpi_V2_00/V2_00_step_03.html index 55294eecec2c06101ef5a9ff2775d347795e79ef..fee9c39b21bfb698a6c0c53e26877fdeec628561 100644 --- a/public/Ohmpi_V2_00/V2_00_step_03.html +++ b/public/Ohmpi_V2_00/V2_00_step_03.html @@ -39,7 +39,7 @@ <li class="toctree-l1"><a class="reference internal" href="../Ohmpi.html">OhmPi project</a></li> <li class="toctree-l1"><a class="reference internal" href="../V1_01.html">OhmPi V 1.01 (limited to 32 electrodes)</a></li> <li class="toctree-l1"><a class="reference internal" href="../V1_02.html">OhmPi V 1.02 (limited to 32 electrodes)</a></li> -<li class="toctree-l1 current"><a class="reference internal" href="../V2_00.html">OhmPi V 2.xx (64 or 128 electrodes)</a><ul class="current"> +<li class="toctree-l1 current"><a class="reference internal" href="../V2_00.html">OhmPi V 2.xx (64 or 128 electrodes and 12V)</a><ul class="current"> <li class="toctree-l2"><a class="reference internal" href="../V2_00.html#the-philosophy-of-ohmpi">The philosophy of Ohmpi</a></li> <li class="toctree-l2"><a class="reference internal" href="../V2_00.html#technical-data">Technical data</a></li> <li class="toctree-l2 current"><a class="reference internal" href="../V2_00.html#ohmpi-2-step-by-step">Ohmpi 2 step by step</a><ul class="current"> @@ -69,7 +69,7 @@ <div role="navigation" aria-label="Page navigation"> <ul class="wy-breadcrumbs"> <li><a href="../index.html" class="icon icon-home"></a> »</li> - <li><a href="../V2_00.html">OhmPi V 2.xx (64 or 128 electrodes)</a> »</li> + <li><a href="../V2_00.html">OhmPi V 2.xx (64 or 128 electrodes and 12V)</a> »</li> <li><strong>STEP n°3</strong>: MUX board</li> <li class="wy-breadcrumbs-aside"> <a href="../_sources/Ohmpi_V2_00/V2_00_step_03.rst.txt" rel="nofollow"> View page source</a> @@ -255,6 +255,40 @@ </tr> </tbody> </table> +<p>The multiplexing of the channels is a mechanical multiplexing based on OMRON’s manufacturing relays (G5LE-1-VD 12 VDC). Each relay is combined with +a ZVN4206A power MOFSET. The raspberry has only 30 GPIOs, which is not enough to activate all the 64 electrodes, which represent 512 GPIOs. +We used gpio expender I2C (MCP23017). We have associated these components with an I2C muliplexer of type type TCA9548A from adafruit. +This combination allows to go up to 512 GPIOs and up to 128 electrodes. Each card has its own digital address between 0X70 and 0X77. +In the following presentation for an Ohmpi 64 electrodes, we will use the addresses 0X70 for channel A, 0X71 for channel B, 0X72 for channel M and 0X73 for channel N. +0X73 for the N channel. 4 MUX board will be needed to multiplex an Ohmpi 64 electrodes.</p> +<table class="docutils align-center"> +<colgroup> +<col style="width: 12%" /> +<col style="width: 88%" /> +</colgroup> +<tbody> +<tr class="row-odd"><td rowspan="2"><p>1</p></td> +<td><img alt="../_images/MUX_00.jpg" src="../_images/MUX_00.jpg" /> +</td> +</tr> +<tr class="row-even"><td><p>Take the Mux PCB</p></td> +</tr> +</tbody> +</table> +<table class="docutils align-center"> +<colgroup> +<col style="width: 12%" /> +<col style="width: 88%" /> +</colgroup> +<tbody> +<tr class="row-odd"><td rowspan="2"><p>1</p></td> +<td><img alt="../_images/MUX_01.jpg" src="../_images/MUX_01.jpg" /> +</td> +</tr> +<tr class="row-even"><td><p>Take the Mux PCB</p></td> +</tr> +</tbody> +</table> </div> </div> </div> diff --git a/public/_images/00_mes_board_components1.jpg b/public/_images/00_mes_board_components1.jpg new file mode 100644 index 0000000000000000000000000000000000000000..a04c9abdf2e35f6793c3ca0230c0a6f81a7ceb5d Binary files /dev/null and b/public/_images/00_mes_board_components1.jpg differ diff --git a/public/_images/MUX_00.jpg b/public/_images/MUX_00.jpg new file mode 100644 index 0000000000000000000000000000000000000000..686a35fc45a6a18ace8edd339a876e14a9bef592 Binary files /dev/null and b/public/_images/MUX_00.jpg differ diff --git a/public/_images/MUX_01.jpg b/public/_images/MUX_01.jpg new file mode 100644 index 0000000000000000000000000000000000000000..19348c4f4611c767291be53d783ea25143e830be Binary files /dev/null and b/public/_images/MUX_01.jpg differ diff --git a/public/_sources/Ohmpi_V2_00/V2_00_step_02.rst.txt b/public/_sources/Ohmpi_V2_00/V2_00_step_02.rst.txt index 63caad89aa3c0842f9f7846f3f92878576f08345..72c7a5e143c5fc533406c7955157d1b4ccc3e436 100644 --- a/public/_sources/Ohmpi_V2_00/V2_00_step_02.rst.txt +++ b/public/_sources/Ohmpi_V2_00/V2_00_step_02.rst.txt @@ -40,9 +40,12 @@ We have developed a complete "plug and play" measurement board. To measure elect two ADS1115 were used,one for the voltage measurement one for the current measurement, as proposed by Florsch [7]. The ADS1115 is a 16-bit ADC (Analog-to-Digital Converter), with an adaptable gain. The advantage of ADS1115 is that the input signal value could lie between - to + 6.114 V. For the current measurement we have directly integrated the INA282 component, -which allows to realize precise current measurement around a shunt resistor. The assembly steps are described in the following steps: +which allows to realize precise current measurement around a shunt resistor. The assembly are described in the following steps: +.. note:: + + In this version, We used a shunt resistor of 2 ohms, which limits the current measurement to 48 mA. If the current is higher than this value, you just have to decrease the value of the shunt resistor. .. table:: :align: center @@ -461,5 +464,5 @@ Setting up an equivalent electronic circuit, for this you will need: | | .. image:: step_n_2/c/20211206_144334.jpg | |7 +------------------------------------------------------------+ | | Run Ohmpi_4elec.py, if everything works you should | - | | get the following result | + | | get the following result (220 ohm) | +--------+------------------------------------------------------------+ diff --git a/public/_sources/Ohmpi_V2_00/V2_00_step_03.rst.txt b/public/_sources/Ohmpi_V2_00/V2_00_step_03.rst.txt new file mode 100644 index 0000000000000000000000000000000000000000..4ff499043765b9f6ab0ed2bdde08b7a7d36f0c2d --- /dev/null +++ b/public/_sources/Ohmpi_V2_00/V2_00_step_03.rst.txt @@ -0,0 +1,53 @@ + +**STEP n°3**: MUX board +**************************************************** + + +**PART A** Assembly of MUX board +====================================================== + + +Required components +---------------------------------------------------- + +.. figure:: step_n_3/a/00_mes_board_components.jpg + :width: 600px + :align: center + :height: 450px + :alt: alternate text + :figclass: align-center + + +.. csv-table:: List of components + :file: step_n_3/a/MUX_board_list_2_xx.csv + :widths: 30, 70, 70, 70, 70, 35, 35 + :header-rows: 1 + +The multiplexing of the channels is a mechanical multiplexing based on OMRON's manufacturing relays (G5LE-1-VD 12 VDC). Each relay is combined with +a ZVN4206A power MOFSET. The raspberry has only 30 GPIOs, which is not enough to activate all the 64 electrodes, which represent 512 GPIOs. +We used gpio expender I2C (MCP23017). We have associated these components with an I2C muliplexer of type type TCA9548A from adafruit. +This combination allows to go up to 512 GPIOs and up to 128 electrodes. Each card has its own digital address between 0X70 and 0X77. +In the following presentation for an Ohmpi 64 electrodes, we will use the addresses 0X70 for channel A, 0X71 for channel B, 0X72 for channel M and 0X73 for channel N. +0X73 for the N channel. 4 MUX board will be needed to multiplex an Ohmpi 64 electrodes. + +.. table:: + :align: center + + +--------+------------------------------------------------------------+ + | | .. image:: step_n_3/a/MUX_00.jpg | + | 1 +------------------------------------------------------------+ + | | Take the Mux PCB | + | | | + +--------+------------------------------------------------------------+ + +.. table:: + :align: center + + +--------+------------------------------------------------------------+ + | | .. image:: step_n_3/a/MUX_01.jpg | + | 1 +------------------------------------------------------------+ + | | Take the Mux PCB | + | | | + +--------+------------------------------------------------------------+ + + \ No newline at end of file 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project","<strong>STEP n\u00b01</strong> : Raspberry Pi configuration","<strong>STEP n\u00b02</strong>: Measurement board","<strong>STEP n\u00b03</strong>: MUX board","OhmPi V 1.01 (limited to 32 electrodes)","OhmPi V 1.02 (limited to 32 electrodes)","OhmPi V 2.xx (64 or 128 electrodes and 12V)","OHMPI: Open source and open hardware resitivity-meter"],titleterms:{"128":6,"12v":6,IDE:[1,4,5],The:[4,5,6],activ:[1,4,5],assembl:[2,3,4,5],board:[2,3,4,5],card:[4,5],center:7,check:2,cite:0,complet:[4,5],compon:[2,3,4,5],configur:[1,4,5],connect:[4,5],current:[4,5],data:[4,5,6],descript:[2,4,5],document:7,electr:[4,5],electrod:[4,5,6],environn:[1,4,5],four:[4,5],frist:[4,5],hardwar:7,implement:[4,5],implent:[4,5],initi:[4,5],inject:[4,5],instal:[1,4,5],instruct:[4,5],introduct:0,limit:[4,5],list:[2,3,4,5],measur:[2,4,5],mesur:[4,5],meter:7,multiplex:[4,5],mux:3,ohmpi:[0,4,5,6,7],onli:[4,5],open:7,oper:[4,5],packag:[1,4,5],paramet:[4,5],part:[1,2,3],partenair:0,philosophi:[4,5,6],preliminari:[4,5],procedur:[4,5],project:0,python:[1,4,5],rapberri:[1,4,5],raspberri:[1,4,5],requir:[2,3],resist:[4,5],resit:7,sourc:7,start:2,startup:[4,5],step:[1,2,3,6],summari:7,tabl:4,technic:[4,5,6],thonni:[1,4,5],titl:4,virtual:[1,4,5]}}) \ No newline at end of file diff --git a/sphinx/build/doctrees/Ohmpi_V2_00/V2_00_step_02.doctree b/sphinx/build/doctrees/Ohmpi_V2_00/V2_00_step_02.doctree index 027a47a9e6389e66422beea38b42a303e631a55b..3ee7985c014a631ad452c7f241887aa712155d41 100644 Binary files a/sphinx/build/doctrees/Ohmpi_V2_00/V2_00_step_02.doctree and b/sphinx/build/doctrees/Ohmpi_V2_00/V2_00_step_02.doctree differ diff --git a/sphinx/build/doctrees/Ohmpi_V2_00/V2_00_step_03.doctree b/sphinx/build/doctrees/Ohmpi_V2_00/V2_00_step_03.doctree index f1ccb74ed8a9a3062fd688b8e139fa3e89a9275c..f753b75abb4cbf6d17234ca72d40501f8d80641f 100644 Binary files a/sphinx/build/doctrees/Ohmpi_V2_00/V2_00_step_03.doctree and b/sphinx/build/doctrees/Ohmpi_V2_00/V2_00_step_03.doctree differ diff --git a/sphinx/build/doctrees/environment.pickle b/sphinx/build/doctrees/environment.pickle index d4f03b3d13b7cca4d4a35b945deb798843905512..6e3686b5dab083be9ae71014418897bdeea39098 100644 Binary files a/sphinx/build/doctrees/environment.pickle and b/sphinx/build/doctrees/environment.pickle differ diff --git a/sphinx/build/html/Ohmpi_V2_00/V2_00_step_02.html b/sphinx/build/html/Ohmpi_V2_00/V2_00_step_02.html index 7a3b606b12e3e7bab7b0e6bc57bc61cf0bea348d..89405fa589a78508f94c6124ae83f78f197c4ef1 100644 --- a/sphinx/build/html/Ohmpi_V2_00/V2_00_step_02.html +++ b/sphinx/build/html/Ohmpi_V2_00/V2_00_step_02.html @@ -325,7 +325,11 @@ We have developed a complete “plug and play†measurement board. To measure e two ADS1115 were used,one for the voltage measurement one for the current measurement, as proposed by Florsch [7]. The ADS1115 is a 16-bit ADC (Analog-to-Digital Converter), with an adaptable gain. The advantage of ADS1115 is that the input signal value could lie between - to + 6.114 V. For the current measurement we have directly integrated the INA282 component, -which allows to realize precise current measurement around a shunt resistor. The assembly steps are described in the following steps:</p> +which allows to realize precise current measurement around a shunt resistor. The assembly are described in the following steps:</p> +<div class="admonition note"> +<p class="admonition-title">Note</p> +<p>In this version, We used a shunt resistor of 2 ohms, which limits the current measurement to 48 mA. If the current is higher than this value, you just have to decrease the value of the shunt resistor.</p> +</div> <table class="docutils align-center"> <colgroup> <col style="width: 12%" /> diff --git a/sphinx/build/html/Ohmpi_V2_00/V2_00_step_03.html b/sphinx/build/html/Ohmpi_V2_00/V2_00_step_03.html index a0f022019b3988c0a13f2fee4fae332d95acdcd0..fee9c39b21bfb698a6c0c53e26877fdeec628561 100644 --- a/sphinx/build/html/Ohmpi_V2_00/V2_00_step_03.html +++ b/sphinx/build/html/Ohmpi_V2_00/V2_00_step_03.html @@ -258,9 +258,8 @@ <p>The multiplexing of the channels is a mechanical multiplexing based on OMRON’s manufacturing relays (G5LE-1-VD 12 VDC). Each relay is combined with a ZVN4206A power MOFSET. The raspberry has only 30 GPIOs, which is not enough to activate all the 64 electrodes, which represent 512 GPIOs. We used gpio expender I2C (MCP23017). We have associated these components with an I2C muliplexer of type type TCA9548A from adafruit. -This combination allows to go up to 512 GPIOs and up to 128 electrodes. -Each card has its own digital address between 0X70 and 0X77.</p> -<p>In the following presentation for an Ohmpi 64 electrodes, we will use the addresses 0X70 for channel A, 0X71 for channel B, 0X72 for channel M and 0X73 for channel N. +This combination allows to go up to 512 GPIOs and up to 128 electrodes. Each card has its own digital address between 0X70 and 0X77. +In the following presentation for an Ohmpi 64 electrodes, we will use the addresses 0X70 for channel A, 0X71 for channel B, 0X72 for channel M and 0X73 for channel N. 0X73 for the N channel. 4 MUX board will be needed to multiplex an Ohmpi 64 electrodes.</p> <table class="docutils align-center"> <colgroup> @@ -276,6 +275,20 @@ Each card has its own digital address between 0X70 and 0X77.</p> </tr> </tbody> </table> +<table class="docutils align-center"> +<colgroup> +<col style="width: 12%" /> +<col style="width: 88%" /> +</colgroup> +<tbody> +<tr class="row-odd"><td rowspan="2"><p>1</p></td> +<td><img alt="../_images/MUX_01.jpg" src="../_images/MUX_01.jpg" /> +</td> +</tr> +<tr class="row-even"><td><p>Take the Mux PCB</p></td> +</tr> +</tbody> +</table> </div> </div> </div> diff --git a/sphinx/build/html/_images/MUX_01.jpg b/sphinx/build/html/_images/MUX_01.jpg new file mode 100644 index 0000000000000000000000000000000000000000..19348c4f4611c767291be53d783ea25143e830be Binary files /dev/null and b/sphinx/build/html/_images/MUX_01.jpg differ diff --git a/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_02.rst.txt b/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_02.rst.txt index a133b257eb2da6ebb028e9ba7da90701d0d83490..72c7a5e143c5fc533406c7955157d1b4ccc3e436 100644 --- a/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_02.rst.txt +++ b/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_02.rst.txt @@ -40,9 +40,12 @@ We have developed a complete "plug and play" measurement board. To measure elect two ADS1115 were used,one for the voltage measurement one for the current measurement, as proposed by Florsch [7]. The ADS1115 is a 16-bit ADC (Analog-to-Digital Converter), with an adaptable gain. The advantage of ADS1115 is that the input signal value could lie between - to + 6.114 V. For the current measurement we have directly integrated the INA282 component, -which allows to realize precise current measurement around a shunt resistor. The assembly steps are described in the following steps: +which allows to realize precise current measurement around a shunt resistor. The assembly are described in the following steps: +.. note:: + + In this version, We used a shunt resistor of 2 ohms, which limits the current measurement to 48 mA. If the current is higher than this value, you just have to decrease the value of the shunt resistor. .. table:: :align: center diff --git a/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_03.rst.txt b/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_03.rst.txt index 4a31501e0502b8f31828f72d0f871f0f38ef4f31..4ff499043765b9f6ab0ed2bdde08b7a7d36f0c2d 100644 --- a/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_03.rst.txt +++ b/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_03.rst.txt @@ -26,9 +26,7 @@ Required components The multiplexing of the channels is a mechanical multiplexing based on OMRON's manufacturing relays (G5LE-1-VD 12 VDC). Each relay is combined with a ZVN4206A power MOFSET. The raspberry has only 30 GPIOs, which is not enough to activate all the 64 electrodes, which represent 512 GPIOs. We used gpio expender I2C (MCP23017). We have associated these components with an I2C muliplexer of type type TCA9548A from adafruit. -This combination allows to go up to 512 GPIOs and up to 128 electrodes. -Each card has its own digital address between 0X70 and 0X77. - +This combination allows to go up to 512 GPIOs and up to 128 electrodes. Each card has its own digital address between 0X70 and 0X77. In the following presentation for an Ohmpi 64 electrodes, we will use the addresses 0X70 for channel A, 0X71 for channel B, 0X72 for channel M and 0X73 for channel N. 0X73 for the N channel. 4 MUX board will be needed to multiplex an Ohmpi 64 electrodes. @@ -40,4 +38,16 @@ In the following presentation for an Ohmpi 64 electrodes, we will use the addres | 1 +------------------------------------------------------------+ | | Take the Mux PCB | | | | - +--------+------------------------------------------------------------+ \ No newline at end of file + +--------+------------------------------------------------------------+ + +.. table:: + :align: center + + +--------+------------------------------------------------------------+ + | | .. image:: step_n_3/a/MUX_01.jpg | + | 1 +------------------------------------------------------------+ + | | Take the Mux PCB | + | | | + +--------+------------------------------------------------------------+ + + \ No newline at end of file diff --git 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b/sphinx/source/Ohmpi_V2_00/V2_00_step_02.rst index a133b257eb2da6ebb028e9ba7da90701d0d83490..72c7a5e143c5fc533406c7955157d1b4ccc3e436 100644 --- a/sphinx/source/Ohmpi_V2_00/V2_00_step_02.rst +++ b/sphinx/source/Ohmpi_V2_00/V2_00_step_02.rst @@ -40,9 +40,12 @@ We have developed a complete "plug and play" measurement board. To measure elect two ADS1115 were used,one for the voltage measurement one for the current measurement, as proposed by Florsch [7]. The ADS1115 is a 16-bit ADC (Analog-to-Digital Converter), with an adaptable gain. The advantage of ADS1115 is that the input signal value could lie between - to + 6.114 V. For the current measurement we have directly integrated the INA282 component, -which allows to realize precise current measurement around a shunt resistor. The assembly steps are described in the following steps: +which allows to realize precise current measurement around a shunt resistor. The assembly are described in the following steps: +.. note:: + + In this version, We used a shunt resistor of 2 ohms, which limits the current measurement to 48 mA. If the current is higher than this value, you just have to decrease the value of the shunt resistor. .. table:: :align: center