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Zona libera Aici poti aborda orice subiect, in limitele decentei


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Old 26-08-2019, 03:04   #721
Bobby
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De ce sa te "complici" cu baterie suplimetara si circuit dedicat cand poti folosi un circuit simplu cu 5 componente si un releu.
In schema de jos releul e alimentat atata timp cat tensiunea de alimentare e mai mare decat "tesiunea" diodei zener (10V).
Aceasta se poate inlocui cu o dioda de "valoare" mai mare (10.5, 11, 11.5 V) care se corespunda punctului la care dorim ca releul sa intrerupa alimentarea.



Sursa: instructables.com

Pentru reglrea "fina" a tensiuni la care releul sa intrerupa alimentarea, dioda zener din circuitul de mai sus se poate inlocui cu circuitul prezentat aici.
Circuitul "simuleaza" o dioda zener a carei "valoare" se poate regla cu ajutorul unui potentionetru.
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