Power Supply Adapter

Here the +50V / 3A Stabilized and Regulated Power Supply. schematic diagram: component parts list: R1= 10Kohm R2= 1 ohm 5W R3= 3.9 ohms 1W R4= 6.8Kohm 1W R5= 390 ohms 1W R6= 100Kohm 0.5W R7= 1.2Kohm 1W R8= 1.8Kohm 0.5W R9= 3.3Kohm 0.5W RV1= 470 ohms pot. Q3= BC303 or BC461 D1....4= Bridge 15A D5= LED RED 5mm C1-2-4= 4700uF 100V C3-5= 100nF 250V MKT D6-7= 10V 1W Zener D8-9-10= IN4007 Q1= 2N3055 on heatsink T1= 230Vac / 55V 3A Q2= BD162 or BD243 or BD543 Note: It 's a circuit that can give in his exit + 40V until + 60V 3A, with simultaneous stabilization. The materials that use is very simple and will not exist difficulties in the manufacture, is enough you are careful certain points: For output voltages smaller of + 50V until + 40V, the Q1 is hot enough, so that it needs one big heatsink. For output voltages bigger of + 50V up to + 70V, the stabilization is not satisfactory. Conclusion: ideal output voltage is + 45V until + 60V. In the circuit potensiometer RV...

This is 0-15 volt / 1 Ampere power supply circuit diagram . This is very simple and easy to built, the output is stabilized and regulated. Maximum output 15V and 1 Ampere, u can use this circuit for common electronic devices like radio , cd player, mini amplifier or just for your experimental circuits. Components list: R1= 56ohm 2W R2= 330ohm Lin. pot. C1= 2200uF 35V C2= 100uF 35V C3= 10uF 25V C4= 220uF 25V C5= 100nF 100V Q1= 2N3055 GR1= 4 X 1N4007 D1= 18V 1.5W zener T1=220V@18V 1.5A

Very high current regulated power supply . This circuit require a transformer which have output 24v / 35A. It should be an expensive circuit :( Notes: The input transformer is likely to be the most expensive part of the entire project. As an alternative, a couple of 12 Volt car batteries could be used. The input voltage to the regulator must be at least several volts higher than the output voltage (12V) so that the regulator can maintain its output. If a transformer is used, then the rectifier diodes must be capable of passing a very high peak forward current, typically 100amps or more. The 7812 IC will only pass 1 amp or less of the output current, the remainder being supplied by the outboard pass transistors. As the circuit is designed to handle loads of up to 30 amps, then six TIP2955 are wired in parallel to meet this demand. The dissipation in each power transistor is one sixth of the total load, but adequate heat sinking is still required. Maximum load current will generate maxi...

13.8 Volt 10 A regulated power supply . You need 10 Ampere transformer for this circuit . Complete explanation about this circuit , please visit this page .

This PSU has been especially designed for current-hungry ham radio transceivers. It delivers safely around 20Amps at 13.8V. For lower currents, a separate current limiting output, capable of 15ma up to a total of 20A has been added. The power transformer should be capable to deliver at least 25A at 17.5 to 20V. The lower the voltage, the lower power dissipation. The rectified current will be “ironed” by the C1, whose capacity should not be less than 40.000uF, (a golden rule of around 2000uF/A), but we recommend 50.000uF. This capacity can be built up by several smaller capacitors in parallel. The base of this design is a simple 12V regulator (7812). The output voltage can be brought to desired value (here 13.8V) by two external resistors (R5 and R6) using this formula: U= 12(1+R5/R6) The low currents (here 15mA) will keep the 7812 in its regular function. As soon as the current rises over 15ma, the voltage drop on R4 will “open” the Q3, actually handling the high output current. Thi...

Actually, this is ordinary regulated power supply , but the current expander using a transistor make this power supply become powerful. Based on the datasheet, the stabilizer IC’s can deliver up to 1A output current. For example 78xx series regulators are available in different voltage ratings, but in any case the current should not exceed 1A . The transistor Q1 (2N 29055) used here has 5A current capacity. The resistor R1 is used to keep the current through regulator IC below 300mA . When the current through R1 increases the base current of Q1 (2N 29055) also increases & the load required load current flows through this transistor. By this way a current greater than the capacity of the regulator IC can be delivered to the load. The C1 is used to filter the ripples off the rectifier output. Notes: Assemble the circuit on good quality PCB. T1 can be a 230V primary,15V/1A secondary, step down transformer. If 1 A bridge is not available, make one using four 1N 4007 diodes. The s...

Here is 9V Regulated Power Supply schematic diagram : You can use this power supply for your electronics project which only require electric current about 500mA. This is cheap circuit which will give you stabilized output voltage. If you want to change the output voltage, you should change the IC type. For example, you need 5V output, then change the IC from 7098 with 7805 dan change the output of transformer from 16V AC become 9VAC or 12V AC.