Inventor(s): Kevin V. Nguyen (Allen, TX) Assignee(s): Open Invention Network LLC (Durham, NC) Law Firm: No Counsel Application No., Date, Speed: 15358508 on 11/22/2016 (777 days app to issue)
Cuando a la salida se requieren corrientes mayores a 1,5Amperes, como vemos en la imagen superior, la hoja de datos aconseja colocar un transistor externo para aumentar la posibilidad de conmutar mayores niveles de corriente a través de L. Esta consideración deberá también contemplarse al momento de elegir una bobina que soporte el régimen de trabajo elegido. Una configuración Darlington resultante en la salida (transistor en IC + transistor adicional) permitirá mayores velocidades de conmutación y en consecuencia una menor disipación de temperatura, hecho que nos favorece al no requerir voluminosos disipadores de calor para el transistor agregado. También debemos aumentar la característica de corriente del diodo de salida, siendo siempre preferente una elección de modelo con la mayor velocidad posible de conducción.
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This is another one that’s not really “on” until 4.5 V or so. It’ll work great for small currents, but it’ll get really hot and kill your battery life at 3.3 V.
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At its heart, Tesla’s coil is a radio transmitter — but one that operates without communications as its goal and in an environment where corona discharge is welcomed rather than strongly discouraged!
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I had to cut out the part about skin effect and smooth copper. I hope to get to them during on eof the PCB related followup videos… there was just too much in this one and something had to be cut. (Its why you see skin effect mentioned in the drawing)
Years ago, the obvious answer to this dilemma would be TIP120 or similar bipolar junction transistor (BJT) — and a lot more batteries. The beauty of old-school Darlington transistors in low-voltage circuits is that the microcontroller only needs to produce a small current to push relatively large currents on the business end. With BJTs, as long as you can get over the base-emitter junction voltage (typically under one or two volts) you just pick the right base resistor and you’re set. This is in contrast to FETs of the day which require a given voltage to pass a current through them. Gate voltages for the big FETs are optimized for the 4-5 V range which is lousy if you all you have is a LiPo battery.
Abstract: An electrical connector is provided comprising a female member configured to couple with male member. The female member includes a female receptacle having an opening, and a female electrode is at least partially disposed within the female receptacle. A resilient member is configured to enhance electrical connection between the female electrode and a male connector electrode.
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