Archive for category: Power Supply circuits

5V/1A Power Supply

Power Supply circuits | By: Diagram mania

TECHNICAL CHARACTERISTICS: Tendency of entry: 220V AC Tendency of expense: 5V DC Current of expense: 1A Materially: C1 1000mF/16V electrolytic C2, C4 100nF polyester C3 100mF/16V electrolytic d1-4 4 x 1N4004 or bridge of passages 50V – 1A U1 LM7805 T1 Transformer of catering 220V/9V – 1A Notes: Changing the prices of certain elements we […]

A simple step-up converter (6V to 12V)

Power Supply circuits | By: Diagram mania

This step-up converter is intended for use in a ’67 Citroen 2CV. This car, and I use the word loosely, has a 6V battery and won’t support a modern radio that needs 12V. The circuit described here converts 6V to 12V at 1A sustained load current. It works something like this: When the switch is […]

NiCd – NiMH Charger

Power Supply circuits | By: Diagram mania

The charger is build around a LM317 (click to download datasheet) adjustable regulator. The charge starts when a battery is connected between pins JP1-JP4 or JP2-JP4 or JP3-JP4. For example, if a battery is connected to JP1-JP4 pins then the current that flows cause a voltage drop to R1, then D1 causes a voltage drop […]

1.2 – 15V/3A adjustable regulated power supply

Power Supply circuits | By: Diagram mania

Circuit provided by Buy this circuit as a kit from Anykits Specifications This kit provides a variable output power supply ranging from 1.2 to 15 V @ 3 A. It uses Low Dropout Positive Regulator LM1084 in TO220 package for delivering variable output voltage. Input – 18 VAC/DC Output – variable output from 1.2 ~ […]

Dual Voltage Power Supply

Power Supply circuits | By: Diagram mania

Description The following circuit Diagram of (DUAL VOLTAGE POWER SUPPLY ) can be used for Misc.. application. It requires a few components to built. The most important components of this circuit are REGULATORS. 1 : (AN) 7812 and 2 : (AN) 7912 AN7812 is the Positive Voltage Regulator. It regulates the voltage from (almost) 24vDC […]

13.8V/40A Stabilized Power Supply

Power Supply circuits | By: Diagram mania

This power supply was designed for ham-radio use and has been in operation for over 10 years. Its design is very simple and practically immune to RF. It is assembled from discrete components, being the most costly element a 600VA toroidal transformer, which can be replaced by another with different characteristics, provided it has a […]

Rectification using a Gyrator Circuit

Power Supply circuits | By: Diagram mania

Circuit : Andy Collinson Email me Description An electronic recitification circuit. The use of large, heavy and expensive electrolytic capacitors is avoided, being replaced by an active transistor in this gyrator circuit. Circuit Notes To avoid excess ripple output on a power supply feeding a heavy load, usually a large value capacitor is chosen following […]

L200 Power Supply

Power Supply circuits | By: Diagram mania

Circuit : Andy Collinson Email me Description Power supply with variable voltage and fixed current regulation made using the ubiquitous L200C regulator. Notes The versatile 5 pin L200C regulator offers both voltage and current regulation in a single package. The IC also features thermal shutdown and input over voltage protection up to 60 Vdc. The […]

Fuse Monitor Indicator

Power Supply circuits | By: Diagram mania

Circuit : Andy Collinson Email me Description: The idea for this project may have come to me in a flash of inspiration, and its a very simple way to check if a fuse has blown without removing it from its holder. Notes The simplicity of this circuit uses just two components, but with just one […]

Unregulated PSU

Power Supply circuits | By: Diagram mania

Circuit : Andy Collinson Email me Description: A basic full wave rectified power supply is shown below. The transformer is chosen according to the desired load. For example, if the load requires 12V at 1amp current, then a 12V, 1 amp rated transformer would do. However, when designing power supplies or most electronic circuits, you […]