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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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VOLTAGE REGULATOR sa CURRENT REGULATOR sa ELECTRIC POWER CONTROLLER sa SURGE PROTECTOR sa UNINTERRUPTABLE POWER SUPPLY x REGULATOR (VOLTAGE) xx CURRENT REGULATOR xx ELECTRIC xx ELECTRIC POWER SUPPLY Op amps for audio. Part 3. Regulated power circuits (RC filter, voltage regulator, power supply). Technique for selecting the zener components in a simple voltage stabilizer. A high quality power supply (voltage) regulator for use with any IC operational amplifier audio preamplifier. A simple, rugged, dual-tracking voltage regulator circuit can supply from 5- to 30-volts (+/-). Design for a high-voltage, low-impedance type voltage regulator that incorporates the Sulzer-type regulator. Push-pull shunt regulator for an audio power supply. Provides a supply output of +/- 24V DC. Parallel (shunt) voltage regulators for audio. Several practical circuits are included. Dual voltage-regulator module. A simple circuit module that allows you to easily plug in voltage regulation wherever you need it. As shown, the design handles up to 30V output, but can be modified for higher voltages. Taming high line voltage. Circuit for a conditioner to output a consistent 115-116 volts AC. No-feedback voltage regulators. Results of extensive work on regulator circuits to control output voltage. A power-line protection circuit uses relays to provide some protection from wiring errors. Tip: Small-value capacitors on the input and output of three-terminal regulators will prevent oscillation in the voltage level. Cyber Supply. Get precise volts from bench power supplies. Interface lets you digitally control a linear bench-type DC power supply to produce precise voltages in 100- or 50-millivolt increments (up to 2 amperes current). Est. cost: $70. Guard precious electronic components from overload damage by adding a single IC to the circuit. Several examples shown. Use a positive or negative regulator to build any fixed or variable voltage regulator from 3 to 30 volts. Voltage regulator circuit to power a Tempo S-1 from an external 13.8 v.d.c. source. Simple line-voltage reducer is used to reduce 120-volts AC down to 111-volts AC. The lower voltage is more suitable for operating old electric equipment, such as vintage radios. Step-down and step-up regulator circuits for obtaining as much useful power from a battery as possible. Build an enlarger-lamp voltage controller for black-and-white photographic printing. Est. cost: $35. Circuit to control any 78xx series three-terminal voltage regulator using logic signals. Power supply regulation. Learn the strengths and weaknesses of the two principal off-line power supplies (linear-regulated and switching-regulated). Off-line linear voltage regulators. Includes instructions for building two miniature power supplies: (1) Adjustable DC output of 8 to 12 volts up to 100 milliamperes. (2) Precision 5-volt DC output. Connecting a blinking red LED (such as Radio Shack's 276-036) directly to the output of a 7805 (or 78L05) voltage regulator. Fooling a voltage regulator IC into supplying a higher than specified output is easily done using Zeners or regular silicon diodes. Time-ratio control power regulator for mobile radio power supply. Developed by General Electric. Voltage regulator for photographic enlarger lamp. Voltage regulator design nomograms. Circuit uses transistor base-emitter junctions in place of Zener diodes for voltage regulation. Zener diode voltage-regulator nomograms simplify selection of components. Basic operation and specifications of Zener diodes along with simple design technique for using them as shunt regulators. Using zener diodes as voltage regulators. A high quality vacuum tube voltage regulator. Build a prototype power supply that features a 250V feedback-type regulator. Vacuum-tube regulator design. Circuits for regulators with 250-600V outputs which are varied over only a small range. The amount of current supplied can be any reasonable amount. Advice on choosing voltages and tubes. Line voltage regulator. Tube regulator using feed forward to improve line regulation and reduce ripple. Circuit for a positive feedback 100mA voltage regulator that is intended for preamplifiers or as a screen regulator for power amplifiers. Output voltage can be either 250 or 300 volts. Designing practical DC power supplies. Voltage-regulator circuits. Looks at three-terminal regulators, current regulators, output-current limiting, over-voltage protection, heat sinks, switching regulators, and inverter circuits. Overvoltage protector circuit for use with 12-volts DC. Schematic for a simple crowbar circuit which will detect an overvoltage situation and shut down the computer before any damage can be done. How to use a LM317 voltage regulator IC to regulate the output of a portable battery pack. Schematic for a voltage regulation circuit to add to an inexpensive 14-volt power supply. Micro-power regulator circuit draws only 5 microamperes of standby power. In operation it can deliver up to 50 milliamperes to the output load. Add an external power transistor to boost output to 1 ampere. AC-to-DC conversion. How a power supply really works, regulators you can build, and a computer program to aid design. The versatile LM723 precision voltage regulator IC. What it is, how it works, typical circuits, etc. Visual regulator monitor. Separate circuits with LEDs alert you to loss of regulation, overcurrent and thermal problems caused by regulator ICs in power supplies. Switching voltage-regulator ICs. Includes a circuit in which a +26-volt input is used to produce a + 5-volt output at 5 amperes. Designing a buck-boost voltage regulator. How to choose a voltage regulator for your photographic enlarger. Voltage-regulated battery power supply will furnish a constant 9-volt output and extend battery life well beyond "end-point" voltage. Whole unit fits into a plastic soap case. Bendix circuit for a one-transistor voltage regulator. Has 10- to 14-volt input, with 8.6 +/-0.25 volt output. Voltage regulator for a 45-55 volt input and a 28 volt at 0.5 ampere output. Monitor circuit shunts excess voltage to a lamp. Four building-block power supply circuits. Two transformer-rectifier units, a series regulator and a shunt regulator. Power-line booster/reducer can provide a maximum addition and subtraction of 12 volts in 3-volt increments, starting at 6 volts. Used to protect sensitive instruments from AC power line fluctuations. Put a Zener diode to work and design your own voltage regulators. Basic formulas and circuit for Zener control. Circuit for an inexpensive voltage booster that will boost 110-volt ac power by 5.4% to compensate for the drop in line voltage at peak demand periods. Power guard. Boost ac line voltage by 10 to 20 volts whenever the line voltage drops below 105 volts. Circuit shows the common way of connecting a zener voltage regulator. Simple circuit uses the "crowbar" technique to prevent more than 15-volts DC from getting to a mobile transceiver. Typical circuits for integrated circuit voltage regulators for converting 110-volt ac power to low-voltage dc applications. Add voltage regulation to a color photo enlarger. Will maintain dc voltage within 1% even if the ac line voltage varies up to 10%. Est. cost: $20. Line-voltage compensator. A 6.3-volt transformer can be used to boost 117-volt AC line current by about 6-volts. Protection circuit senses any sudden increase (or decrease) in power supply output voltage and automatically shuts off power supply to regulator. The ferroresonant AC voltage regulator will smooth out power-line voltage variations. The unit employs a ferroresonant transformer and will handle loads up to 250 watts. Build an automatic line voltage regulator that will raise 117-volt AC power-line voltage by six-volts whenever it drops below a preset level. Circuit provides a regulated +12 volts to a battery powered radio even if the automobile voltage regulator should fail. Circuit for a 5-volt regulator circuit which accepts 10-15 volt DC input. Circuit for a power pulse generator which uses the LM150/250/350 adjustable voltage regulator. Eliminate data loss. Simple circuit, usable with any microcomputer, will help prevent outages due to power line disturbances. R-F filter and surge arrestor will handle up to 80-watts. Est. cost: $8. Choosing and using three-terminal voltage regulators. How they work, how they are used, and how to select the right one for a project. Includes several power supply circuits. Adjustable voltage-regulator ICs. How they operate and typical applications. Voltage regulator applications. (1) In-rush current limiter circuit keeps current at the rated operating level of the device to be protected. (2) Visible-light transmitter circuit. (3) Visible-light receiver circuit. (4) Using two common voltage regulators to vary both voltage and current. (5) Circuit to control a small DC motor or small lamp. Simple single-transistor circuits. (1) Voltage regulator outputs 6-volts DC. (2) Constant-current output. (3) Simple audio amplifier. (4) Impedance-matching circuit. (5) LED-control circuits turn either off or on in the presence of a DC voltages from 5- to 9-volts. (6) Relay-driver circuit has a latching feature that keeps the relay on once energized. Simple diode circuits. (1) Bridge rectifier. (2) Sound-level (audio signal) limiter circuit never exceeds 1.5-volts peak-to-peak. (3) DC polarity or AC indicator circuit. (4) Kick-back voltage limiter for inductive loads. (5) Steering circuit controls relays based on voltage polarity. (6) Simple temperature sensor. (7) Circuit for selecting matching diodes. More diode circuits. (1) Clamping circuits for either the positive or negative portion of an AC signal. (2) Protective circuits prevent reverse-voltage damage. (3) Meter guard circuit limits maximum voltage that can reach a meter. (4) Noise generator and amplified noise generator circuit uses a Zener diode. (5) Circuit to monitor the symmetry of an AC waveform. (6) RF switching circuit, antenna switcher, and transceiver switch for connecting radio equipment to an antenna. Switchable regulator. Zener diodes, a rotary switch and common parts form a simple circuit to convert a 15-volt DC input into three or more fixed-voltage outputs. Using zener diodes as voltage regulators. Circuit to regulate the output from a solar panel to levels useful for low-voltage applications. How to use adjustable or programmable DC power supply (voltage) regulators. Power regulator for a photographic enlarger will keep power surges and dips from changing the exposure on photo prints. Est. cost: $25-$35. Build a switching-type voltage regulator which offers greater efficiency than conventional supplies. Lets you invert the output polarity or program the output for step-up or step-down. Estimated cost: $37. Tips on designing voltage regulators and power supplies. How to raise or lower the output voltage from a fixed-output voltage regulator. Typical applications for voltage regulator IC's are shown. All about power-supply circuits. An in-depth look at practical power supplies and voltage regulators. Explanation of a "crowbar" circuit which monitors the output voltage of a regulated power supply. Simple switching regulator steps up two AA cells or drops down a 9-volt battery to give you a fixed +5-volt. Circuit to turn the 78XX family of regulators on and off using external logic from another device. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
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