Battery Charger Powered using Single Solar Cell

Battery Charger Powered using Single Solar Cell
This is the schematic diagram of battery charger circuit that powered using single solar cell. The circuit designed using MC14011B  manufactured by ON Semiconductor. CD4093 can be used to replace MC14011B. Supply voltage range : 3.0 VDC to 18 VDC. (more…)

1-15V DC Digital Power Supply with 15 Steps

1-15V DC Digital Power Supply with 15 Steps
This is a simple digital power supply circuit diagram to obtain variable DC voltage from 1.25V to 15.19V in reasonably small steps. The steps of up and down voltage can be down by press the up and down switch, and it use LED indicator to show the level of the output voltage. You can use DC input voltage between 20V and 35V. You must prepare a DC power supply before built this circuit. (more…)

50V DC 3A Stabilized and Regulated Power Supply

50V DC 3A Stabilized and Regulated Power Supply
This is the DC power supply that will give you 50V / 3A output, regulated and stabilized. Components List: R1=10Kohm R8=1.8Kohm 0.5W Q3=BC303 or BC461 R2=1 ohm 5W R9=3.3Kohm 0.5W D1....4=Bridge 15A R3=3.9 ohms 1W RV1=470 ohms pot. D5=LED RED 5mm R4=6.8Kohm 1W C1-2-4=4700uF 100V D6-7=10V 1W Zener R5=390 ohms 1W C3-5=100nF 250V MKT D8-9-10=1N4007 R6=100Kohm 0.5W Q1=2N3055 on heatsink T1=230Vac / 55V 3A R7=1.2Kohm 1W Q2=BD162 or BD243 or BD543 (more…)

1V-27V 3A Variable DC Power Supply Circuit Diagram

1V-27V 3A Variable DC Power Supply Circuit Diagram
Above diagram is the scheme of variable DC power supply with output range of 1V to 17V. This power supply is used very few components, the power supply will be so easy to build. Serial power transistor which will be known and popular 2N3055, power supply has a voltage control and current. The source of alternating voltage is 24V transformer. This circuit used Integrated Circuit / IC LM723, also known as UA723 which is a dedicated integrated circuit design

12V / 20A Regulated DC Power Supply

12V / 20A Regulated DC Power Supply
Here the circuit diagram of 12V / 20A Regulated DC Power Supply using 5 pieces of power transistor MJ2955, voltage regulator 78S12. It will give you regulated output voltage of 12V-15V 20A. A 350VA transformer power, the primary winding 230 , secondary winding is 18V . The secondary voltage of 18V with the load of the transformer , the voltage at idle , it is customary in the case of such efforts is higher than 5 % to 10

Simple Symmetrical Power supply +25v -25v

Simple Symmetrical Power supply +25v -25v
This symmetrical unregulated power supply is used to feed the audio amplifier based on LM1875 amplifier module National Semiconductor. With symmetrical 30V DC source the amplifier capable of delivering up to 30W of power using 8 ohm load. (more…)

Power supply 4.5 A with 3 LM317 in parallel

Power supply 4.5 A with 3 LM317 in parallel
This lm317 variable power supply can supply a voltages from 1.2V to 30V with a current 3 amperes, just as the title of this series based on LM317T voltage regulator, the LM317T regulator provide around 1.5 amperes on the heatsink, so by installing a parallel two or three of them will get a voltage source capable of providing 3 amperes. Obviously this also depends on the transformer used. (more…)

Power Supply source +5 Vdc +12 Vdc

Power Supply source +5 Vdc +12 Vdc
This power supply circuit shows a steady source of continuous power supply combined with an output of +5 VDC and +12 VDC to ground, it is estimated for designing a current of about 900mA Max, enough to power any digital circuit with a relay output,that must be taken into account is the cascade design makes total consumption is the sum of the currents provided by the two outputs. Please note that the regulator should be equipped with a heat