Page 13 Converters: AC to AC Circuits

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
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Last Updated on: Wednesday, June 02, 2021 04:22 AM

Circuits Designed by Dave Johnson, P.E. :

Variable AC Power Supply - In electronics, it is often handy to have a fully isolated variable AC power supply. With such a device you can safely test various AC powered circuits and even probe around in the circuit with an oscilloscope. The hobby circuit below was designed to . . . [Hobby Circuit designed by Dave Johnson P.E., 07/08/00]
Variable Isolated AC Voltage Spans 0Vac to 280Vac - 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 . . . [Circuit by David Johnson P.E., 07/09/00]
Voltage Boost to Series Regulator provided by Capacitor - This circuit adds some capacitors and diodes to a traditional transformer type series regulator circuit to extend the normal operating range. It can insure regulation during low line voltage conditions or it can squeeze a few more watts out of a plug-in-the-wall power adapter power supply . . . [Hobby Circuit designed by Dave Johnson P.E., 01/01/98]

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

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Use Amplifier Phono Input as Line Level Input: Inverse RIAA Filter - The circuit does two functions: signal level attenuation and inverse RIAA filtering. The signal attenuation is needed to convert the 500 mV signal to 2. 5 mV signal. The inverse-RIAA filtering is needed to make the frequency response of the system flat (same equalization that is used when music is transferred to vinyl in the studio). The picture. . . [Tomi Engdahl]

Variable AC Power Supply - In electronics, it is often handy to have a fully isolated variable AC power supply. With such a device you can safely test various AC powered circuits and even probe around in the circuit with an oscilloscope. The hobby circuit below was designed to . . . [Hobby Circuit designed by Dave Johnson P.E., 07/08/00]

Variable Isolated AC Voltage Spans 0Vac to 280Vac - 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 . . . [Circuit by David Johnson P.E., 07/09/00]

Voltage Boost to Series Regulator provided by Capacitor - This circuit adds some capacitors and diodes to a traditional transformer type series regulator circuit to extend the normal operating range. It can insure regulation during low line voltage conditions or it can squeeze a few more watts out of a plug-in-the-wall power adapter power supply . . . [Hobby Circuit designed by Dave Johnson P.E., 01/01/98]

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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