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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 CONVERTER sa BATTERY ELIMINATOR sa HIGH-VOLTAGE GENERATOR sa INVERTER (AC/DC) sa RECTIFIER sa VOLTAGE DIVIDER sa VOLTAGE MULTIPLIER sa VOLTAGE TO FREQUENCY CONVERSION x CONVERTER (VOLTAGE) xx ELECTRIC POWER SUPPLY xx VOLTAGE TO FREQUENCY CONVERSION How to construct a d.c.-to-d.c. converter which allows a battery-powered HT (walkie-talkie) to operate from an automobile battery or other source instead of internal NiCads. Power supply circuit ideas, particularly for battery-powered applications. Part 3. DC/DC converters boost 1.5 volts to 5 volts. How to drop a battery voltage. Diodes, their theory and their use in a 12-volt to 9-volt shunt-type regulator to drive a transistor radio from a car battery. Voltage converters. How to build a variety of voltage-conversion circuits and put them to work in your own circuit designs. Using the DC-to-DC converter module as an alternative to the custom design of a power supply. Negative voltage converter. Build a negative voltage supply from a CMOS voltage converter IC and obtain minus 12-volts the easy way. Inexpensive IC voltage converter permits operation of all transistorized 6-volt battery-operated equipment from the 12-volt battery source of any vehicle. A wooden rack holding a 12-volt automobile battery and a combination battery charger/inverter results in a portable 117-volt power supply. 12-volt to 250-volt DC/DC converter. Build a 250V DC B+ supply to run a tube circuit in a car or from batteries. Alter the output of your power supply by adding a voltage doubler, voltage inverter, and/or voltage multiplier. Three circuits shown. Inverter for your automobile converts 12-volts DC into 120-volts AC. Capable of powering AC devices drawing up to 40 watts. Circuit for an adapter to produce a 6-volt output from a 12-volt car system. Useful for powering 6-volt portable radios using the automobile electrical system. Voltage converter circuits using the LT1070 switching voltage regulator. Includes a 5- to 12-volt boost converter, a positive-to-negative boost converter, and a high-voltage output converter. Converting current to voltage. Three amplifier circuits are shown. New developments in op amps. Includes circuits for an instrumentation amplifier, thermocouple thermometer, temperature-compensated crystal-oscillator, and a 9-volt to 5-volt converter. Dc-to-Dc converters. A simplified approach to designing and building circuits to convert one DC voltage to another. Tips on traveling abroad with electronics equipment. Potential voltage problems and some solutions. Probing the mysteries of the inverter. Part 1. How an inverter produces alternating current (AC) from direct current (DC). Probing the mysteries of the inverter. Part 2. Tips on using power inverters (12-volts DC to 120-volts AC) to power electronic flash units on location. Schematic for an autotransformer that can raise or lower AC line voltage by 5 or 10 volts. A 6- to 12-volt "Up-Verter". Equip 6-volt automobiles to power 12-volt accessories with this converter. Handles up to 40 watts. Est. cost: $20. Power inverter converts 12-volt DC current into 117-volts AC, 100-watts maximum. DC/dc converter circuit. Transformerless DC-to-AC converter is good for any mobile application. Basically, it is a DC chopper plus voltage-doubler rectifier circuit. Boost 9-volt batteries to 300-volt output with this converter. For use with geiger tubes. Circuit for using a 555 oscillator to produce a negative 12-volt output from a +15-volt input. A look at dc/dc converters. Typical circuits for converting one dc voltage to a higher one. Build a sine-wave inverter. Boost 12 volts DC to 117 volts AC at 100 watts. Also used to recharge storage batteries. Est. cost: $70. High-voltage dc/dc converters. Typical circuits to generate the high-voltages needed for neon lamps, lasers, flash tubes and other applications. Circuit for a power supply that will reduce 12-volt dc automobile electrical system power to 5-volts regulated for driving a digital clock. Typical circuits for integrated circuit voltage regulators for converting 110-volt ac power to low-voltage dc applications. Miniature dc-dc converter allows a tiny watch battery to power a neon lamp or even a powerful semiconductor-laser pulser which require 70 to 150 volts at relatively low current. Control the speed of small dc motors, the brightness of a lamp, or otherwise drop a dc voltage by using pulse-width modulation. An integrated polarity converter. A look at the Intersil ICL 7660 voltage polarity converter chip which generates a negative voltage from a positive input voltage. May become a standard feature in computer power supplies. Dual chopper amplifier circuit is used to amplify a minute DC signal so that it can be read out on any digital voltmeter. The circuit works by converting the input into an AC signal, amplifying the AC, and then rectifying back to DC. Inverter circuit can deliver AC or DC of several hundred volts from an input of 12 or 14 volts. Power inverter circuit can deliver high voltage AC or DC from a 12 VDC input. Using appliances overseas. Learn exactly how to adapt your U.S. electrical equipment for overseas electrical power. Collection of 555 oscillator/timer circuits. (1) Astable multivibrator. (2) Modified astable. (3) Add-on LED dual-flasher circuit. (4) Add-on high-power dual-lamp flasher circuit. (5) DC-to-DC converter. (6) Dual-tone generator. Switch-operated circuit incorporating a capacitor is used to convert an output voltage from positive to negative. Circuit takes a positive voltage and turns it upside down to produce a negative power supply. Simple circuit functions as a power supply voltage inverter. Use it to supply the negative voltage for bipolar op-amp configurations. How to make a portable inverter to change 12-volt DC into 117-volt AC to power appliances on a trip. DC to AC inverter converts 12 volt DC to 120 volts, 60 cycle AC to power anything drawing less than 120 watts. Use a 555 IC to build a voltage-to-frequency converter. Use your frequency counter to measure voltages up to 5 volts. Voltage converter IC lets you power analog circuits from a digital supply. Typical circuit applications shown. Easy-to-build power inverter allows AC devices to be operated from a 12-volt DC battery. Equip it to "kick in" automatically for use during a power failure and you have an uninterruptable power supply. Circuit for a 12-to-6 volt DC converter. Circuit to get a negative voltage from a single-ended positive supply uses only a single inverter. Simple switching regulator steps up two AA cells or drops down a 9-volt battery to give you a fixed +5-volt. Op-amps show their versatility in instrumentation circuits. Includes circuits for rectifier, peak detector, AC/DC converter, voltmeter, ammeter, ohmmeter, voltage reference, and power supply. Understanding electricity in foreign countries. How to check the voltage and use converters to power electrical equipment designed for 120 volt, AC, 60 Hz. Three circuits to reduce 12 volts DC to 6.3 volts without a transformer. A basic RC drive corrector. Circuit for an inverter (12-volt DC to 110-volt AC) can also function as a telescope drive corrector by adding push buttons. | |||||||||
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