Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

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AC to AC Converters (AC to AC Power Supplies and Transformer Circuits)
AC to AC:  #-A       B-F      G-I      J        K-O       P-S      T-Z
         
Converters -- Main Page

Last Updated on: Friday, August 21, 2015 06:56 AM

Circuits Designed by Dave Johnson, P.E. :
  • 0VAC to 280VAC Variable Isolated AC Voltage -  I designed and built this circuit about 25 years ago. It came in handy for many projects that were powered from 120 VAC, 240 VAC and 277 VAC. It provides complete isolation from the power line. It uses two 1:1 isolation transformers that are wired in parallel . . . [Hobby Circuit designed by David A. Johnson P.E.,  07/08/00]

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

0VAC to 280VAC Variable Isolated AC Voltage -  I designed and built this circuit about 25 years ago. It came in handy for many projects that were powered from 120 VAC, 240 VAC and 277 VAC. It provides complete isolation from the power line. It uses two 1:1 isolation transformers that are wired in parallel . . . [Hobby Circuit designed by David A. Johnson P.E.,  07/08/00]

10W Amplifier using TDA2003 -  Here is the circuit diagram of a 10W audio amplifier using the popular TDA2003 IC from SGS Thomson. The IC can easily deliver 10W to a 4 Ohms load at 18V DC supply voltage. The IC can be also operated from 12V and that makes it applicable in car audio systems. . .  [Designer's name not included]

150 Ohm Line to 600 Ohm Load Application -  AS011 Application Note. Isolation transformer with impedance conversion (App Note -  04/03/02) . . .  [Jenson Transformers]

20ma Current Loop Tester -  A while back I needed to test a circuit at 240vac. Since I needed to safely test the circuit using my oscilloscope, I needed the 240vac to be fully isolated from the power line. So, to step up the voltage, I bought a small isolation transformer from Digikey . . . [Circuit by Dave Johnson P.E.,  05/29/11]

2-Way Passive Guitar Splitter -  AS013 Application Note. From one guitar to two guitar amplifiers (App Note -  04/03/02) . . .  [Jenson Transformers]

4-20ma Current Loop Tester -  This circuit injects an adjustable current through a wire loop. Using a digital current meter, the current can be adjusted from near zero to over 24 milliamps . . . [Circuit by Dave Johnson P.E.,  05/01/12]

4-Way Active Guitar Splitter -  AS014 Application Note. From one guitar to up to four guitar amplifiers (App Note -  04/03/02) . . .  [Jenson Transformers]

50 Ohm Long Line Driver -  AS029 Application Note. . .  [Jenson Transformers]

50 Ohm Long Line Receiver & Driver -  AS029 Application Note. . .  [Jenson Transformers]

600 Ohm Line Isolation Application -  AS010 Application Note. Isolation transformer for 600 ohm balanced audio line (App Note -  04/03/02) . . .  [Jenson Transformers]

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AC to AC Converters (AC to AC Power Supplies and Transformer Circuits)
AC to AC:  #-A       B-F      G-I      J        K-O       P-S      T-Z
         
Converters -- Main Page


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