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55 LED's - Transformer less Power Supply / low cost

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775 Motor speed controller using LM 2596 DC -DC Buck converter | Adjustable step down module

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LM 2596 DC -DC Buck converter | Adjustable step down module | specifications -Application

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12v LED Monostable multivibrator / oscillator / flashing (Astable to Monostable convert) / using transistor and capacitor & resistor

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12v LED Astable multi-vibrator / oscillator / flashing /blinking- using transistor and capacitor & resistor

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5v USB Multi -Mobile charger from 6v Battery | Big Power Bank

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Analog FM Radio receiver with audio amplifier( 88 MHz to 108 MHz )- How to make

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