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A joule thief is a minimalist self-oscillating voltage booster that is small, low-cost, and easy to build, typically used for driving small loads. This circuit is also known by other names such as blocking oscillator, joule ringer, or vampire torch. It can use nearly all of the energy in a single-cell electric battery, even far below the voltage where other circuits consider the battery fully discharged (or "dead"); hence the name, which suggests the notion that the circuit is stealing energy or "joules" from the source – the term is a pun on "jewel thief". The circuit is a variant of the blocking oscillator that forms an unregulated voltage boost converter. The output voltage is increased at the expense of higher current draw on the input, but the integrated (average) current of the outpu

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rdfs:label
  • لص الطاقة (ar)
  • Joule thief (de)
  • Ladrón de julios (es)
  • Ladro di Joule (it)
  • Voleur de joules (fr)
  • Joule thief (en)
  • Jouletjuv (sv)
rdfs:comment
  • لص الطاقة (بالإنجليزية: Joule Thief)‏ هي أبسط دوائر رفع الجهد المستمر، تستخدم عادةً في تشغيل الأحمال الصغيرة حيث تقوم بسحب كل الطاقة في البطارية وتكبير جهدها في مخرج الدارة حتى تفرغ بشكل كامل خلافاً لدارات أخرى تسحب حتى نسبة محددة من البطارية ولكن ينخفض التيار المسحوب والمزود للحمل ويلاحظ جلياً في اضاءة الليد واشعاعه وشحن البطاريات من مصدر فرق جهده اقل من جهد البطارية التي تستغرق فترة طويلة بسبب ضعف التيار. (ar)
  • Un "ladrón de julios" es un sencillo circuito que permite drenar prácticamente toda la energía de una batería, mediante la amplificación del voltaje generado por ésta. En la edición de noviembre de 1999 de (EPE), Z. Kaparnik publicó un sencillo circuito que consiste en una fuente conmutada de un transistor con realimentación de transformador. Debido a su simplicidad y utilidad, el circuito se ha hecho popular con el paso del tiempo. Este circuito también recibe el nombre de oscilador de bloqueo (blocking oscillator). (es)
  • Un voleur de joules est un circuit électronique convertisseur de tension Boost auto-oscillant réduit à sa plus simple expression. Petit, peu coûteux et facile à fabriquer, généralement utilisé pour alimenter de petits appareils (lampe de poche, baladeur numérique, , etc.). Il permet d'utiliser la quasi totalité de l'énergie contenue dans une pile ou un accumulateur à cellule unique. Le potentiel de ce circuit tient au fait qu'il est possible de faire fonctionner une ou plusieurs LED à partir d'une tension de seulement 0,7 V. (fr)
  • Jouletjuv är namnet på en enkel switchad omvandlare som är lätt att bygga och kan använda nästan all elektrisk energi i ett batteri, betydligt längre än när de flesta andra kretsar uppfattar ett batteri som "dött". (sv)
  • Als Joule thief (deutsch Joule-Dieb oder Energiedieb) bezeichnet man in der Elektronik eine diskrete elektronische Schaltung, die eine elektrische Gleichspannung in eine höhere elektrische Spannung transformiert. Sie stellt eine besonders einfache und kompakte Realisierung eines Resonanzwandlers dar. (de)
  • A joule thief is a minimalist self-oscillating voltage booster that is small, low-cost, and easy to build, typically used for driving small loads. This circuit is also known by other names such as blocking oscillator, joule ringer, or vampire torch. It can use nearly all of the energy in a single-cell electric battery, even far below the voltage where other circuits consider the battery fully discharged (or "dead"); hence the name, which suggests the notion that the circuit is stealing energy or "joules" from the source – the term is a pun on "jewel thief". The circuit is a variant of the blocking oscillator that forms an unregulated voltage boost converter. The output voltage is increased at the expense of higher current draw on the input, but the integrated (average) current of the outpu (en)
  • Il ladro di Joule è un circuito elettronico analogico elevatore di tensione in corrente continua (convertitore boost) minimale. Si compone infatti di soli cinque componenti: l'alimentazione da 1,5 V o meno, un resistore, un transistor, un LED ed un nucleo toroidale in ferrite.Il LED bianco necessita di almeno 3,2 V per accendersi. Questo circuito funge da elevatore di tensione.Il nome ladro di Joule è dato dal fatto che la pila che lo alimenta tende ad essere prosciugata fino alla tensione di saturazione VCE(sat) del transistor, solitamente a 0,4 V. Usando un transistor con una VCE(sat) più bassa, la pila tenderà a scaricarsi fino a quel valore. (it)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Joule_thief.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Conventional_Joule_Thief_with_red_LED.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Joule_thief_schematic_const_voltage_de.svg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Joule_thief_schematic_de.svg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Joule_thief_waveform.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Regulated_Joule_Thief_generalization_and_cleaning.svg
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