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,
Read More
Showing posts with label Voltage. Show all posts
Showing posts with label Voltage. Show all posts
Voltage doubling circuit NE555
The circuit diagram of a simple voltage absolute NE555 timer application of doubler is evident here. NE555 IC is currently active as a astable mutivibrator operating at about 9 kHz. The abject of two transistors (Q1 and Q2) is short and completion of the astable multivibrator (PIN 3) is affiliated to it.When an astable multivibrator is low, Q1 is OFF and Q2 will be activated. Abrogating that C3
Read More
Ultra low Drop Linear Voltage Regulator
Ultra low Drop Linear Voltage Regulator CircuitThe ambit is a MOSFET based beeline voltage regulator with a voltage bead of as low as 60 mV at 1 ampere. Bead of a beneath millivolts is accessible with bigger MOSFETs accepting lower RDS(on) resistance. The ambit in Fig. 1 uses 15V-0-15V accessory from a step-down agent and employs an n-channel MOSFET IRF 540 to get the adapted 12V achievement
Read More
3A Switching Voltage Regulator
3A Switching Voltage RegulatorAbove circuit diagram is a easy, simple and bargain switching voltage regulator which has adequacy to bear adjustable voltage achievement ambit of 1.8V to 32V and changeless electric accepted of 3A. This regulator use adjustable regulator IC of LM317HV and a ability PNP transistor of 2N3792.The LM317HV is adjustable 3-terminal positive voltage regulators capable of
Read More
Voltage converter circuit using TDA 2003
6 to 12 volts Converter Circuit using TDA 2003Two IC TDA2003 are used here, which are connected to oscillators and their results are identical, but 180 out of phase. Capacitors C3 and C6 determine the frequency of these oscillators respectively. When IC1's output charges capacitor C1 to the voltage across diode D2. When the output of IC1 is high, this voltage is also added to the C1. Now the
Read More
Voltage regulator with LT1086
Under all loading conditions , the minimum voltage difference between the regulator Vin and Vout pins must be at least 1.5V , IC LT1086 low-dropout voltage. If this requirement isn't met, the output falls out of regulation. Two programming resistors, R1 and R2, set the output voltage 12V, and the IC LT1086 servo the voltage between the output and its adjusting terminals to 1.25V. Capacitor C1
Read More