DiscoverCircuits.com, has 28,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to material posted by the designer. 
Please let us if you would like us to link to your design.

Allpass Network Shifts Signals 90° - 04/27/95 EDN-Design Ideas: (design idea added 1/03)

Digital Delay Unit For Surround Sound - The Mitsubishi M65830 Digital Delay IC has been discontinued (for reasons beyond my comprehension), and so far a suitable replacement device has not been found. This means (of course) that you will be unable to build this delay circuit. I have left the project in place as reference, and the overall connection schematic is still valid if (when?) a replacement for the M65830 is located. The project will be updated at that time. In the meantime, just ignore the delay circuit .... (schematic / circuit design added 9/02)

Quadraphonic Amplifier - This is a four channel amplifier ideally suited for use with quadraphonic equipment such as a Sound Blaster Live card. (added 4/02)

Simple Surround Processor - Simple Surround Processor. This is built with only conventional parts, and digital delay block, too. So it is very easy to build.  (added 6/06)

Simple Surround Sound Decoder - This surround-sound decoder is based on the "Hafler" principle, first discovered by David Hafler sometime in the early 1970s. The original idea was to connect a pair of speakers as shown in Figure 1, for use as the rear speakers in the surround setup....(electronic design added 6/07)

Surround Effect - ….(design added 03/08)

Surround Processor - Simple Surround Processor. This is built with only conventional parts, and digital delay block, too. So it is very easy to build.  (added 6/06)