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How to Test a Zener Diode

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Simple Mobile Phone Charger Circuit

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Voltage regulator circuit using zener Diode and Transistor

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Battery Status Indicator Circuit (Battery Low or Charged Fully) Using LED

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555 Timer IC Operation (Astable & Monostable)

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555 Timer IC Calculator(Astable)

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555 Timer IC calculator (Monostable)

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DC 6V to 12V Boost Converter Circuit Using 555 Timer IC

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Meaning of the Charge & Voltage rating on a Capacitor

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Half and Full Wave Bridge Rectifier Circuit

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Emergency Mobile Phone Charger Using 1.5V battery

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DC Variable Power Supplier Circuit Using IC LM317/LM117

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