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Converters: DC to AC Circuits and Inverter Circuits
DC to AC:   # - A       B - G        H - N       O - Z
Power Supplies -- Main Page           Converters -- Main Page
Last Updated on: Friday, August 21, 2015 06:59 AM

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.,  03/27/99]

  • 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.,  07/13/06]


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 then 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. . . .  [design's name not included]

 

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. . . .  [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. . . .  [design's name not included]

 

12 VDC: 120 VAC Inverter Schematic -  This Inverter takes 12 volt d. cand 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. . .  [Circuit Design by Andy Collison]

 

12 Volt DC to 120 Volt AC Inverter -  This Inverter takes 12 volt d. cand 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. . .  [Circuit designed by Aaron Cake]

 

12 Volt to 120 Volt Inverter -  Ever needed a low power 120volt ACpower source for your car, van or truck? Well this circuit should do the trick for you. It will supply 15 watts of AC power to a device. It should power lamps, shavers, small stereos and small appliances. If you draw to much power. . . .  [Randy Linscott's website]

 

12-240V Inverter -  This vibrator inverter provides 240VAC at 60W from a 12V battery. . .  [email designer: cablehack at 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.,  03/27/99]

 

12VDC He-Ne Laser Supply -  Schematic only, no circuit description. . .  [CircuitoZ.net, contact Ruddy]

 

12VDC to 120VAC Inverter -  Have you ever wanted to run a TV, stereo or other appliance while on the road or camping? Well, this inverter should solve that problem. It takes 12 VDC and steps it up to 120 VAC. The wattage depends on which tansistors you use for Q1 and Q2, as well as how "big" a transformer you use for T1. The inverter can be constructed to supply anywhere from 1 to 1000 (1 KW) watts . . .  [Circuit 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. . .  [email Colin Mitchell: talking AT tpg.com.au]

 

300-kHz Conversion System -  File contains several designs, please scroll to find this circuit. . . .  [Analog Devices-Analog Dialogue by Graves, Ed]

 

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. . . .  [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. . .  [Tony van Roon's circuit]

 

6v to 12v Converter -  This inverter circuit can provide up to 800mA of 12V power from a 6V supply. For example, you could run 12V car accessories in a 6V (British?) car. The circuit is simple, about 75% efficient and quite useful. By changing just a few components, you can also modify it for different voltages. . .  [Circuit designed by Aaron Cake]

 

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.,  07/13/06]

 

AN14 Transistor Considerations for LCD Backlighting -  Zetex Semiconductors Applications Note:   A study of  parametric requirements of Bipolar transistors for  self-oscillating resonant "Royer" inverter with respect to LCD backlighting, including circuit behaviour,   voltage ratings of most relevance to ensure optimised device selection, and compact packaging options. . . 

 

AN17 Emergency Lighting Systems & Battery Powered Fluorescent Lighting: High Current To92 Switching Transistors Provide 87% DC-AC Conversion Efficiency -  Zetex Semiconductors Applications Note:   An overview of  principles behind typical emergency lighting systems, fluorescent tube behaviour, and  requirements of  transistors for efficient voltage inversion. The note also includes two "Royer" based designs for low voltage systems.  . . . 

 

AN-237: Choosing DACs for Direct Digital Synthesis -  AN-237 Analog Devices App Note - . . . 

 

AN-327: DAC ICs: How Many Bits is Enough? -  AN-327 Analog Devices App Note - Digital audio playback DACs are available in a variety of different architectures--each with it's own performance tradeoffs. . . .   


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