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template.handlebars<html> <head> <title>{{pageName}}</title> <meta charset="utf-8"> <link rel="stylesheet" href="{{resource "assets/normalize.css"}}"> <link rel="stylesheet" href="{{resource "assets/skeleton.css"}}"> <link href="{{resource "assets/style.css"}}" rel="stylesheet" type="text/css"> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/glightbox/dist/css/glightbox.min.css"> <script src="https://cdn.jsdelivr.net/gh/mcstudios/glightbox/dist/js/glightbox.min.js"></script> </head> <body> <div class="container"> <div class="row"> <h1 class="text-2xl font-bold"> {{pageName}} </h1> <p> This page provides evaluation of <a href="https://roboticsbrno.github.io/RB0004-NeopixelBooster">RB0004 – NeopixelBooster</a> shown in the photo below: </p> <a href="{{resource "assets/modules.jpg"}}" class="glightbox u-full-width block"> <img src="{{resource "assets/modules.jpg"}}" class="block" style="max-height: 400px; max-width: 100%; margin: 4px auto;"/> </a> <p> You can power the strip with input voltage up to 18 V. The minimal supply voltage is 6 V, however, in such scenario the usage of the module makes no sense. The modules can be used with 2S Li-Ion cells (nominal voltage 8.4 V). Without an active cooling the step-down is able to deliver 4 A continuously on the output. Therefore, we do not recommend connecting more than 60 LEDs on a single module. </p> </div> <div class="row"> <h2> RB0004 – UniversalStepdown properties </h2> <p> The following tables provides raw data from testing the step-down converter. </p> <p> The chip and coil temperature was measured by a K-type thermocoupler after 5 minutes of operation for a 1 minute. In one of the cases the temperature did not rise, therefore, the measurement should reflect conditions during continuous operation. </p> {{#each dataPerVoltage}} <h3> Parameters for input voltage {{@key}} V </h3> <table class="u-full-width"> <thead> <tr> <td> Load </td> <td> Output voltage </td> <td> Output ripple </td> <td> Input current </td> <td> Temperature chip, coil </td> <td> Output voltage waveform </td> </tr> </thead> {{#each this}} <tr> <td class="text-center"> {{fixedPoint this.load}} A </td> <td class="text-center"> {{fixedPoint this.outputVoltage}} V </td> <td class="text-center"> {{fixedPoint this.ripple}} mV </td> <td class="text-center"> {{fixedPoint this.inputCurrent}} A </td> <td class="text-center"> {{fixedPoint this.chipTemperature}} °C, {{fixedPoint this.coilTemperature}}°C </td> <td class="text-center"> <a href="{{resource this.scopeImage}}" class="glightbox" data-gallery="gallery-{{@../key}}" data-title="{{@../key}} V input, {{this.load}} A load"> waveform </a> </td> </tr> {{/each}} </table> {{/each}} </div> <h2 class="text-xl font-bold mt-4"> Figures </h2> <div class="row"> <img class="six columns" src="{{chartSrc "Efficiency"}}"/> <img class="six columns" src="{{chartSrc "Output voltage"}}"/> </div> <div class="row"> <img class="six columns" src="{{chartSrc "Ripple"}}"/> <img class="six columns" src="{{chartSrc "Coil temperature"}}"/> </div> <div class="row"> <img class="six columns" src="{{chartSrc "Chip temperature"}}"/> </div> <h2 id="setup"> Measurement setup </h2> <p> The measurements above were taken in an ambient temperature 22°C using the following equipment: <ul> <li>Electronic load: <a href="https://www.bkprecision.com/products/dc-electronic-loads/8540-150-w-dc-electronic-load.html" class="no-underline text-blue-400 hover:underline;"> B&K Precision 8540 </a> </li> <li>Multimeter for voltage & current measurement: <a href="https://t1.daumcdn.net/cfile/tistory/99C4F8335A13B27607?download" class="no-underline text-blue-400 hover:underline;"> ESCORT 179 </a> </li> <li>Oscilloscope: <a href="https://www.rigolna.com/products/digital-oscilloscopes/1000z/" class="no-underline text-blue-400 hover:underline;"> Rigol DS1054Z </a> </li> <li>Multimeter for contact temperature measurement: <a href="https://www.uni-t.cz/en/p/multimeter-uni-t-ut-70a" class="no-underline text-blue-400 hover:underline;"> Uni-T UT-70A </a> </li> </ul> </p> <div class="row"> <a href="{{resource "assets/setup1.jpg"}}" class="glightbox six columns" data-gallery="setup"> <img src="{{resource "assets/setup1.jpg"}}" class="u-full-width" style="margin-bottom: 10px;"/> </a> <a href="{{resource "assets/setup2.jpg"}}" class="glightbox six columns" data-gallery="setup"> <img src="{{resource "assets/setup2.jpg"}}" class="u-full-width" style="margin-bottom: 10px;"/> </a> </div> <div id="footer"> </div> </div> <script type="text/javascript"> const lightbox = GLightbox(); </script> </body> </html>