Showing posts with label ne555. Show all posts
Showing posts with label ne555. Show all posts
Thursday, August 28, 2014
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.
Resistor
R1 = 47K
R2 = 10K
R3 = 56R
Capacitor
C1 = 0.01uF
C2 = 0.01uF
C3 = 0.001uF
C4 = 0.1uF
C5 = 50uF
Transistor
Q1 = TIP29 , TIP120, 2N4922, TIP61, TIP110, or 2N4921
Q2 = TIP30 , TIP125, 2N4919, TIP62, TIP115, or 2N4918
IC
U1 = NE555
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