Cable Banana Socket with LED indicator

Cable Banana Socket with LED indicator

prusaprinters

<h3>&nbsp;</h3><h3>BOM (Bill of Material)</h3><ul><li>Cable - black-red: <a href="https://www.tme.com/us/en-us/details/tas-c102-0.75/speaker-cables/tasker/c102-0-75/">https://www.tme.com/us/en-us/details/tas-c102-0.75/speaker-cables/tasker/c102-0-75/</a></li><li>Banana socket on panel - red: <a href="https://www.tme.com/us/en-us/details/bs-324-lg-r/4mm-banana-sockets/">https://www.tme.com/us/en-us/details/bs-324-lg-r/4mm-banana-sockets/</a></li><li>Banana socket on panel - black: <a href="https://www.tme.com/us/en-us/details/bs-324-lg-b/4mm-banana-sockets/">https://www.tme.com/us/en-us/details/bs-324-lg-b/4mm-banana-sockets/</a></li><li>LED - 3 mm, red: <a href="https://www.tme.com/us/en-us/details/l-937iid/tht-leds-3mm/kingbright-electronic/">https://www.tme.com/us/en-us/details/l-937iid/tht-leds-3mm/kingbright-electronic/</a></li><li>Do not forget the ballast resistor for the LED (e.g. <a href="https://www.tme.com/us/en-us/details/mp0.6w-1k/0-6w-metal-film-tht-resistors/royal-ohm/mf006bb1001a10/">https://www.tme.com/us/en-us/details/mp0.6w-1k/0-6w-metal-film-tht-resistors/royal-ohm/mf006bb1001a10/</a>), but the value depends on your max. voltage (see below)</li></ul><h3>How to choose the right Ballast resistor for the LED</h3><figure class="image image-style-align-right image_resized" style="width:50%;"><img src="https://media.prusaprinters.org/media/prints/126677/rich_content/ec376235-292f-49d4-9a5b-c51ebf62b6fb/led-resistor-calculator-1.png#%7B%22uuid%22%3A%226d63d734-b3aa-447b-888c-e3fb6cd8b071%22%2C%22w%22%3A911%2C%22h%22%3A371%7D"></figure><p>If you buy recommended LED from the BOM, parameters for formula are:&nbsp;</p><ul><li>V_LED (forward voltage) = 2.5 V</li><li>I_LED (forward current) = 20 mA.</li></ul><p><strong>Example</strong>: When your Source Voltage has maximum at 24 V so it is R = (24 - 2.5) / 0,02 = 1075 = ~1 kΩ Ballast resistor.</p><figure class="image image-style-align-center"><img src="https://media.prusaprinters.org/media/prints/126677/rich_content/8e726b47-bc73-478b-afd3-8e916cff910a/led-resistor-calculator-2.png#%7B%22uuid%22%3A%224eeb24e4-a7cf-4cae-8080-8f59d79e9074%22%2C%22w%22%3A961%2C%22h%22%3A675%7D"></figure><h3>Examples for other voltages with the same LED</h3><figure class="table" style="width:450px;"><table><thead><tr><th style="text-align:center;">Vs [V]</th><th style="text-align:center;">R [Ohm]</th><th style="text-align:center;">Resistor from E12 series 5 % [Ohm]</th></tr></thead><tbody><tr><td style="text-align:center;">3.3</td><td style="text-align:center;">40</td><td style="text-align:center;">39</td></tr><tr><td style="text-align:center;">5</td><td style="text-align:center;">125</td><td style="text-align:center;">120</td></tr><tr><td style="text-align:center;">8</td><td style="text-align:center;">275</td><td style="text-align:center;">270</td></tr><tr><td style="text-align:center;">10</td><td style="text-align:center;">375</td><td style="text-align:center;">390</td></tr><tr><td style="text-align:center;">12</td><td style="text-align:center;">475</td><td style="text-align:center;">470</td></tr><tr><td style="text-align:center;">15</td><td style="text-align:center;">625</td><td style="text-align:center;">560</td></tr><tr><td style="text-align:center;">18</td><td style="text-align:center;">775</td><td style="text-align:center;">820</td></tr><tr><td style="text-align:center;">24</td><td style="text-align:center;">1075</td><td style="text-align:center;">1000</td></tr><tr><td style="text-align:center;">30</td><td style="text-align:center;">1375</td><td style="text-align:center;">1500</td></tr></tbody></table></figure><h3>Wirings</h3><p>Pretty simple, just check polarity of the LED.</p><figure class="image image-style-align-center image_resized" style="width:75%;"><img src="https://media.prusaprinters.org/media/prints/126677/rich_content/28c695f1-5d7a-4577-915b-d8c95712d76b/20220209_104850.jpg#%7B%22uuid%22%3A%22c55b220c-93b9-4d94-911e-efb331721301%22%2C%22w%22%3A4032%2C%22h%22%3A3024%7D"></figure><h3>Assembly</h3><p>Just few drops of Super Glue to side of panel.</p>

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