Encontrado en una documentación inglesa antigua, este circuito protege un televisor portátil contra la polaridad inversa de la fuente de alimentación, encendiendo un indicador LED.

Protección contra polaridad inversa
Encontrado en una documentación inglesa antigua, este circuito protege un televisor portátil contra la polaridad inversa de la fuente de alimentación, encendiendo un indicador LED.
Se trata de un circuito sencillo, que según el autor está funcionando en su casa con buenos...
Encontramos este circuito en una publicación de 1977. Con él podemos probar amplificadores operacionales...
El circuito presentado fue encontrado en una Radio & Electronics Constructor de 1976. La revista...
Joomla! Version | 5.2.3 |
PHP Version | 8.3.20 |
Identity | guest |
Response | 200 |
Template | cassiopeia |
Database |
|
1 x After Access::preloadPermissions (com_content) (16.22MB) (48.18%) | 19.10ms |
1 x afterRenderComponent com_content (334.52KB) (15.69%) | 6.22ms |
1 x afterInitialise (1.14MB) (9.56%) | 3.79ms |
1 x afterRender (251.44KB) (8.28%) | 3.28ms |
1 x beforeRenderRawModule mod_articles_category (Banco de Circuitos) (358.44KB) (4.12%) | 1.63ms |
1 x afterRenderRawModule mod_finder (Busca_inteligente) (129.21KB) (3.1%) | 1.23ms |
1 x afterRoute (89.95KB) (1.98%) | 786μs |
1 x Before Access::getAssetRules (id:25490 name:com_content.article.29165) (514.65KB) (1.76%) | 698μs |
1 x beforeRenderModule mod_articles_category (Banco de Circuitos) (9.27KB) (1.51%) | 599μs |
1 x beforeRenderComponent com_content (100.41KB) (1.12%) | 442μs |
1 x After Access::preloadComponents (all components) (107.06KB) (0.92%) | 366μs |
1 x afterRenderRawModule mod_articles_category (Banco de Circuitos) (15.43KB) (0.85%) | 336μs |
1 x afterLoad (85.48KB) (0.78%) | 309μs |
1 x Before Access::preloadComponents (all components) (33.45KB) (0.53%) | 212μs |
1 x beforeRenderModule mod_finder (Busca_inteligente) (6.64KB) (0.53%) | 209μs |
1 x beforeRenderRawModule mod_finder (Busca_inteligente) (5.9KB) (0.23%) | 93μs |
1 x afterRenderModule mod_articles_category (Banco de Circuitos) (5.47KB) (0.18%) | 70μs |
1 x afterRenderModule mod_finder (Busca_inteligente) (4.44KB) (0.13%) | 51μs |
1 x afterDispatch (2.25KB) (0.12%) | 49μs |
1 x After Access::getAssetRules (id:25490 name:com_content.article.29165) (7.38KB) (0.1%) | 38μs |
1 x Before Access::preloadPermissions (com_content) (1.57KB) (0.02%) | 9μs |
SELECT @@SESSION.sql_mode;
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79μs1.31KBParams/libraries/src/Session/MetadataManager.php:187CopyUPDATE `incbmx_session`
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196μs992BParams/libraries/src/Session/MetadataManager.php:316CopySELECT `id`,`rules`
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49μs608B/libraries/src/Access/Access.php:955CopySELECT `b`.`id`
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322μs2.39KB/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:587CopyUPDATE `incbmx_content`
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133μs48B/libraries/src/Table/Table.php:1348CopySELECT `a`.`id`,`a`.`asset_id`,`a`.`title`,`a`.`alias`,`a`.`introtext`,`a`.`fulltext`,`a`.`state`,`a`.`catid`,`a`.`created`,`a`.`created_by`,`a`.`created_by_alias`,`a`.`modified`,`a`.`modified_by`,`a`.`checked_out`,`a`.`checked_out_time`,`a`.`publish_up`,`a`.`publish_down`,`a`.`images`,`a`.`urls`,`a`.`attribs`,`a`.`version`,`a`.`ordering`,`a`.`metakey`,`a`.`metadesc`,`a`.`access`,`a`.`hits`,`a`.`metadata`,`a`.`featured`,`a`.`language`,`fp`.`featured_up`,`fp`.`featured_down`,`c`.`title` AS `category_title`,`c`.`alias` AS `category_alias`,`c`.`access` AS `category_access`,`c`.`language` AS `category_language`,`fp`.`ordering`,`u`.`name` AS `author`,`parent`.`title` AS `parent_title`,`parent`.`id` AS `parent_id`,`parent`.`path` AS `parent_route`,`parent`.`alias` AS `parent_alias`,`parent`.`language` AS `parent_language`,ROUND(`v`.`rating_sum` / `v`.`rating_count`, 1) AS `rating`,`v`.`rating_count` AS `rating_count`
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145μs6.12KBParams/components/com_content/src/Model/ArticleModel.php:215CopySELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug`
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WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id
ORDER BY `c`.`lft`
230μs3.91KBParams/libraries/src/Categories/Categories.php:375CopySELECT `m`.`tag_id`,`t`.*
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INNER JOIN `incbmx_tags` AS `t` ON `m`.`tag_id` = `t`.`id`
WHERE `m`.`type_alias` = :contentType AND `m`.`content_item_id` = :id AND `t`.`published` = 1 AND `t`.`access` IN (:preparedArray1,:preparedArray2)
337μs3.97KBParams/libraries/src/Helper/TagsHelper.php:388CopySELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug`
FROM `incbmx_categories` AS `s`
INNER JOIN `incbmx_categories` AS `c` ON (`s`.`lft` <= `c`.`lft` AND `c`.`lft` < `s`.`rgt`) OR (`c`.`lft` < `s`.`lft` AND `s`.`rgt` < `c`.`rgt`)
WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id
ORDER BY `c`.`lft`
209μs3.91KBParams/libraries/src/Categories/Categories.php:375CopySELECT DISTINCT a.id, a.title, a.name, a.checked_out, a.checked_out_time, a.note, a.state, a.access, a.created_time, a.created_user_id, a.ordering, a.language, a.fieldparams, a.params, a.type, a.default_value, a.context, a.group_id, a.label, a.description, a.required, a.only_use_in_subform,l.title AS language_title, l.image AS language_image,uc.name AS editor,ag.title AS access_level,ua.name AS author_name,g.title AS group_title, g.access as group_access, g.state AS group_state, g.note as group_note
FROM incbmx_fields AS a
LEFT JOIN `incbmx_languages` AS l ON l.lang_code = a.language
LEFT JOIN incbmx_users AS uc ON uc.id=a.checked_out
LEFT JOIN incbmx_viewlevels AS ag ON ag.id = a.access
LEFT JOIN incbmx_users AS ua ON ua.id = a.created_user_id
LEFT JOIN incbmx_fields_groups AS g ON g.id = a.group_id
LEFT JOIN `incbmx_fields_categories` AS fc ON fc.field_id = a.id
WHERE
(
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484μs4.75KBParams/libraries/src/MVC/Model/BaseDatabaseModel.php:164CopySELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug`
FROM `incbmx_categories` AS `s`
INNER JOIN `incbmx_categories` AS `c` ON (`s`.`lft` <= `c`.`lft` AND `c`.`lft` < `s`.`rgt`) OR (`c`.`lft` < `s`.`lft` AND `s`.`rgt` < `c`.`rgt`)
WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id
ORDER BY `c`.`lft`
218μs3.91KBParams/libraries/src/Categories/Categories.php:375CopySELECT `name`,`element`
FROM `incbmx_extensions`
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202μs1.89KB/administrator/components/com_finder/src/Helper/LanguageHelper.php:135CopySELECT `title`
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98μs648B/administrator/components/com_finder/src/Indexer/Taxonomy.php:325CopySELECT *
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61μs1.55KBParams/plugins/system/schemaorg/src/Extension/Schemaorg.php:403CopySELECT `a`.`id`,`a`.`asset_id`,`a`.`title`,`a`.`alias`,`a`.`introtext`,`a`.`fulltext`,`a`.`state`,`a`.`catid`,`a`.`created`,`a`.`created_by`,`a`.`created_by_alias`,`a`.`modified`,`a`.`modified_by`,`a`.`checked_out`,`a`.`checked_out_time`,`a`.`publish_up`,`a`.`publish_down`,`a`.`images`,`a`.`urls`,`a`.`attribs`,`a`.`version`,`a`.`ordering`,`a`.`metakey`,`a`.`metadesc`,`a`.`access`,`a`.`hits`,`a`.`metadata`,`a`.`featured`,`a`.`language`,`fp`.`featured_up`,`fp`.`featured_down`,`c`.`title` AS `category_title`,`c`.`alias` AS `category_alias`,`c`.`access` AS `category_access`,`c`.`language` AS `category_language`,`fp`.`ordering`,`u`.`name` AS `author`,`parent`.`title` AS `parent_title`,`parent`.`id` AS `parent_id`,`parent`.`path` AS `parent_route`,`parent`.`alias` AS `parent_alias`,`parent`.`language` AS `parent_language`,ROUND(`v`.`rating_sum` / `v`.`rating_count`, 1) AS `rating`,`v`.`rating_count` AS `rating_count`
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74μs1.37KBParams/administrator/components/com_scheduler/src/Model/TasksModel.php:465Copy