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Voltage Doubler with NE555 timer chip

This circuit is used to drives relays of 24 and 18 VDC from a 12 Volt power supply. The basic circuit on the IC NE 555 timer and use this circuit with almost any NPN or PNP power transistor. Parts:Resistor R1 = 47KR2 = 10KR3 = 56RCapacitorC1 = 0.01uFC2 = 0.01uFC3 = 0.001uFC4 = 0.1uFC5 = 50uFTransistorQ1 = TIP29 , TIP120, 2N4922, TIP61, TIP110, or 2N4921Q2 = TIP30 , TIP125, 2N4919, TIP62, TIP115,

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