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Automatic power switch for ATX power supplies
If you have a computer, for example, wants to operate for a long time like a server, when using a standard ATX power supply the problem exist after a power failure that the computer is’nt...
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60 Watt Laptop Battery Charger
The circuit is designed for laptop battery charger with 20V output voltage. This circuit uses TOP 246 Y made by Power integrations. TOP 246 Y eliminates half the discrete components compared with the...
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Small Size Power Supply 5-12V
The proposed unit is designed for AC power small electronic devices (handheld radios, tape recorders, watches, etc.). The output voltage can be selected within the range of 5 to 12 V. One of the...
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Power Supply for 1500 Watt Audio Power Amplifier
This Power supply circuit is paired with High Power audio amplifier 1500 watts. Power supply required for the amplifier requires a serious approach to the design. First you need a step-down...
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Power Supply for 25W Power Amplifier based MOSFET
The circuit diagram of unregulated power supply above is designed to supply a 25 watts power amplifier based MosFet. The output voltage of this power supply is ±33VDC. Parts list : R1:3K3 1/2W...
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Logic overvoltage protection
The Logic overvoltage protection circuit is designed to protect the TTL logic ICs with supply voltages of 5 V from overvoltage conditions. How it work: Zener diode ZD1 senses the power supply voltage,...
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Mobile NiCd Charger
This mobile battery charger is designed primarily in order to give model enthusiasts the opportunity of charging their Nicad batteries from a car battery out in the open. When the NiCd charger circuit...
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Adjustable regulated power supply 3-30 V / 2.5 A
This Adjustable regulated power supply circuit uses voltage regulator LM723 IC which are already well known. IC LM 723 is designed to provide a voltage of 2-37 volt supply voltage with 150mA current,...
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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...
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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...
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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...
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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...
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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...
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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...
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Simple Photocell Power Supply using MAX630
This is a simple and easy build photocell power supply. It uses 8 pieces of photocell and single regulator IC of MAX630. This circuit capable to deliver either 4.8 or 7.2 V regulated at 15 mA with a...
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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. This electronic circuit feeds a controlled the current...
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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...
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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...
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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...
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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...
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