1.5A Negative Adjustable Power Supply

On September 15th, 2014 by psu | No Comments | Posted in Regulated Power Supply

Negative Adjustable Power Supply Schematic Diagram 300x93 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 & the output voltage is 10V and the output current is 1A then the power dissipated by the heatsink is (30-10)*1 or 20W. This would need a big heatsink. So it is desirable to keep the input voltage as low as possible to achieve the required output.
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pinit fg en rect gray 20 1.5A Negative Adjustable Power Supply

12V / 10A Switching Power Supply

On July 31st, 2014 by psu | No Comments | Posted in Switching Power Supply

12V 10A Switching Power Supply Circuit Diagram 300x201 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 transformer which has 220V primary if your home electric installation use 220VAC.
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pinit fg en rect gray 20 12V / 10A Switching Power Supply

Triple Output DC Power Supply

On July 29th, 2014 by psu | No Comments | Posted in Power Supply Circuit, Regulated Power Supply

triple output DC powersupply circuit 300x211 Triple Output DC Power Supply

This is the circuit diagram of triple output power supply. The output given are:

  1. Adjustable output +1.25V to +20VDC
  2. Splited / dual polarity output +12VDC and -12VDC
  3. 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.
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pinit fg en rect gray 20 Triple Output DC Power Supply

120 V to 12KV High Voltage Converter

On July 2nd, 2014 by psu | No Comments | Posted in High Voltage Power Supply

120 VAC to 12K VDC High Voltage Power Suppy 300x219 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.
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pinit fg en rect gray 20 120 V to 12KV High Voltage Converter

5V 10A 50W Offline Switching Power Supply

On June 28th, 2014 by psu | No Comments | Posted in Switching Power Supply

switching power supply 300x226 5V 10A 50W Offline Switching Power Supply

This is the switching power supply circuit diagram with 50W power output with a 5V voltage 10A current. It is a flyback converter operating in the continuous mode. The circuit features a primary side and secondary side controller will full-protection from fault conditions such as overcurrent.
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pinit fg en rect gray 20 5V 10A 50W Offline Switching Power Supply

Lithium Ion Battery Charger using Solar Cell Power Source

On June 25th, 2014 by psu | No Comments | Posted in Battery Charger, Solar Cell Power Supply

solar cell lithium ion batt charger Lithium Ion Battery Charger using Solar Cell Power Source

The above design diagram is the circuit diagram of Lithium-Ion battery charger which powered using solarcell / photovoltaic as the power source.
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pinit fg en rect gray 20 Lithium Ion Battery Charger using Solar Cell Power Source

Battery Discharge Monitor

On June 21st, 2014 by psu | No Comments | Posted in Battery Charger, Power Supply Circuit

Circuit diagram of battery charging monitor 300x150 Battery Discharge Monitor

Above circuit diagram is a battery monitor circuit which detaches the load when the battery is discharged, anticipating a deep discharge which could cause permanent battery damage. The battery is automatically reconnected when a battery charger or other DC source is connected across the load. Select a relay which requires less than 100mA coil current and with contacts capable of handling the load and charging currents.
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pinit fg en rect gray 20 Battery Discharge Monitor
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