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Converters: DC to AC Circuits and Inverter Circuits
Power Supplies -- Main Page           Converters -- Main Page

DC to AC:   #'s - B      C - L        M - Z
 

Last Updated: December 25, 2017 01:47 PM

Circuits Designed by Dave Johnson, P.E.

12kv Power Supply If you need about 12, 000 volts DC for an ion generator this circuit might be the ticket.  It draws power from the 120vac power line but it uses a small 6KV camera flash trigger coil.  The output signal is isolated from the power line. . . Circuit by David Johnson P.E.-March, 1999

AC to DC Power Supply, Non-Isolated Off-Line This compact efficient circuit can provide up to 100ma of a regulated 5 volts from an AC power source ranging from 20vac to 120vac . . . Hobby Circuit designed by David Johnson P.E.-July, 2006




Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

0-28V 6-8A Power Supply (LM317, 2N3055) This is an easy to make power supply which has stable, clean and regulator 0-28V 6/8 Amp output voltage.  By using two 2N3055 transistors we become more than 2 times the amount of amps then the power supply delivers, making it real though to brake ;).  Although you could use this design to deliver 20 amps   (with almost no modifications and with a proper transformer and a huge heat sink with a fan) , I did not needed such much power.  Make sure you mount them on a huge heat sink, as the 2N3055 transistors can get very hot at full load.  

0-30 VDC Stabilized Power Supply with Current Control 0.002-3 A Copyright of this circuit belongs to smart kit electronics.  In this page we will use this circuit to discuss for improvements and we will introduce some changes based on original schematic.  This is a high quality power supply with a continuously variable stabilised output adjustable at any value between 0 and 30VDC.  The circuit also incorporates an electronic output current limiter that effectively controls the output current from.   __ Designed by www.smartkit.gr

0-30V 20A High Power Supply with LM339 This is High current and Adjustable Volt 0 to 30V 20A.  It easy circuit and nice circuit, Because use IC LM338 and IC 741.  Volt Output adj by VR1-1K. IC LM338 to hold heat-sink.  Transformer is 20A up.  

12 VDC: 120 VAC Inverter Schematic This Inverter takes 12 volt DC and steps it up to 120 volt a.  c.  The wattage depends on which transistors you use for Q1 and Q2, as well as the "Amp Rating" of the transformer you use for T1.  This inverter can be constructed to supply anywhere from 1 to 1000   (1 KW) watts__ Global Village Institute for Appropriate Technology

12 Volt 20 Amp Power Supply A 12 Volt high current 20 Amp power supply.  The output voltage is variable from 12.2 Volt to 14.4V so can be set for any device requiring voltage and current in that range.  This PSU uses an LM723 as the regulator, 4 parallel connected outboard pass transistors and has current limiting above 25 amps __ Designed by Andy Collison

12 Volt DC to 120 Volt AC Inverter This Inverter takes 12 volt DC and steps it up to 120 volt a.  c.  The wattage depends on which transistors you use for Q1 and Q2, as well as the "Amp Rating" of the transformer you use for T1.  This inverter can be constructed to supply anywhere from 1 to 1000   (1 KW) watts __ Designed by Aaron Cake

12 volt Inverter-Very Basic type This circuit will provide a fairly stable "Square Wave" Output Voltage.  Frequency of operation is Mainly determined by the 220 uF Feedback Caps.  Currently about 60 Hz.  Various "off the shelf" transformers can be used. __ Designed by G.L. Chemelec

12-240V Inverter This vibrator inverter provides 240VAC at 60W from a 12V battery __ Contact: blehack @ yahoo dot com

12kv Power Supply If you need about 12, 000 volts DC for an ion generator this circuit might be the ticket.  It draws power from the 120vac power line but it uses a small 6KV camera flash trigger coil.  The output signal is isolated from the power line. . . Circuit by David Johnson P.E.-March, 1999

12V Fluorescent Inverter This is a low-cost project for 20 or 40 watt fluorescent tubes.  However the most efficient is to use a 40 watt tube   (or two 20 watt tubes in series).  It's a circuit you can put together from junk box components or build from a kit.  It's very simple to build and requires no printed circuit board __ Contact: Collin Mitchell

12VDC to 120VAC Inverter This Inverter takes 12 volt DC and steps it up to 120 volt a.  c.  The wattage depends on which transistors you use for Q1 and Q2, as well as the "Amp Rating" of the transformer you use for T1.  This inverter can be constructed to supply anywhere from 1 to 1000   (1 KW) watts __ Designed by Aaron Cake

2 Amp Power Supply This handy power supply has an output of 0v to 12v at 700mA with a transformer that is rated at 1-amp   (such as M-2155) or 1.4amp for a transformer that is rated at 2-amp   (such as M-2156).  Your local electronics shop or model railway supply will have these __ Contact: Collin Mitchell

300ma DC-to-AC Converter This circuit was used to provide battery backup to a device that had an AC   (output) wall transformer.  Due toquasi-sine-wave output and imprecise 60Hz output frequency, some devices might not work properly.  Peak output isDC input voltage minus about 20  __ Designed by Andrew R. Morris

40A Power Supply Unit Capable of running at full power at 100% duty cycle.  

500W Low cost 12V to 220V inverter Using this circuit you can convert the 12V dc in to the 220V Ac.  In this circuit 4047 is use to generate the square wave of 50hz and amplify the current and then amplify the voltage by using the step transformer.   __ Designed by Ashad Mustufa

555 DC-AC Inverter This DC-to-AC inverter schematic produces an AC output at line frequency and voltage.  The 555 is configured as a low-frequency oscillator, tunable over the frequency range of 50 to 60 Hz by Frequency potentiometer R4.  The 555 feeds its output   (amplified by Q1 and Q2) to the input of transformer T1, a reverse-connected filament __ Designed by Tony van Roon  VA3AVR

6 to 12 Volt Converter This circuit can provide up to 800mA of12V power from a 6 Volt supply.  The circuit is simple, about 75% efficient and quite useful __ Designed by Aaron Cake

A 12 volt Inverter-Very Basic type This circuit will provide a fairly stable "Square Wave" Output Voltage.  Frequency of operation is Mainly determined by the 220 uF Feedback Caps.  Currently about 60 Hz.  Various "off the shelf" transformers can be used. __ Designed by G.L. Chemelec

AC to DC Power Supply, Non-Isolated Off-Line This compact efficient circuit can provide up to 100ma of a regulated 5 volts from an AC power source ranging from 20vac to 120vac . . . Hobby Circuit designed by David Johnson P.E.-July, 2006

Bidirectional Power Inverter 08/02/01  EDN-Design Ideas If you want to swap charge in either direction between unevenly loaded positive and negative battery buses, you need an inverting dc transformer.  One implementation is the symmetrical flyback converter shown in Figure 1.  The circuit __ Circuit Design by Tom Napier, North Wales, PA


DC to AC Circuits:   #'s - B      C - L        M - Z


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