Author: psu

0-30V / 5A Adjustable Symmetrical Power Supply

0-30V / 5A Adjustable Symmetrical Power Supply
In the scheme diagram below we present a 0-30V / 5A adjustable symmetrical power supply that can cover a wide range of applications for laboratory or workshop. Values ​​are included in the design diagram. The potentiometers P1 and P2 used to adjust each regulator output independently to the desired value in the range of 0 to 30V. C5 and C6 of 47 to 100nF capacitors improve the response regulators against switching transients at the output. (more…)

12V DC Power Supply without Transformer

12V DC Power Supply without Transformer
These are 12V DC power supply circuit which designed without transformer (trafo). These circuit use capacitive reactance instead of resistance; and it doesn't generate very much heat.The circuit draws about 30ma AC. Always use a fuse and/or a fusible resistor to be on the safe side. The values given are only a guide. There should be more than enough power available for timers, light operated switches, temperature controllers etc, provided that you use an optical isolator as your circuit's

1.2V – 57V Regulated DC Power Supply Circuit

1.2V – 57V Regulated DC Power Supply Circuit
This is the circuit diagram of multi purpose regulated dc power supply which featured with short circuit protection. The electronic workshop is necessary to have a source capable of providing any voltage and sufficient current within an acceptable range of possibilities. This circuit goes beyond conventional sources (which rarely exceed 24V output) giving a maximum of 57V with a current of 1.5A. (more…)

1.5A Negative Adjustable Power Supply

1.5A Negative Adjustable Power Supply
This is the circuit diagram of negative adjustable power supply based LM337T. This circuit can be used for devices which required negative supply to work. The regulator LM337T is capable of supplying 1.5A over an input voltage range of 1.2V to 37V. They need at least a 2.5V input-output voltage differential. In practice the limiting factor on the output voltage & current will be the power dissipated by the regulator. For example, if the input voltage is 30V &

12V / 10A Switching Power Supply

12V / 10A Switching Power Supply
This is the circuit diagram of 12V / 10A switching power supply. The circuit, shown in the schematic, provides 12 volts, at 10 amperes, maximum, using a discrete transistor regulator with an op-amp functioning as a comparator in the feedback circuit. The supply was constructed in 1984 and is variable frequency, as opposed to the pulse width modulator (PWM) controllers used today. The transformer used in this design diagram was for 110-120VAC home electric main, you should change the

Triple Output DC Power Supply

Triple Output DC Power Supply
This is the circuit diagram of triple output power supply. The output given are: Adjustable output +1.25V to +20VDC Splited / dual polarity output +12VDC and -12VDC Splited / dual polarity output +5VDC and -5VDC This is a low-cost and easy built power supply for multipurpose usage. It fulfils the requirements of almost all laboratory experiments. (more…)

120 V to 12KV High Voltage Converter

120 V to 12KV High Voltage Converter
Here is the schematic diagram of 120 V to 12KV power supply, or you may call it high voltage generator or 120V to 12KV converter. This circuit produce very high output voltage that is about 12K volt with very small current of about 5 microAmpere. Two SCRs form two pulse generator circuits. The two SCRs discharge a 0.047uF a 400v capacitor through a xenon lamp trigger coil at 120 times a second. (more…)