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+ electronics-base.com The educational electronics blog with original new articles written by group of engineers.
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+ forrestmims.org Scientific Research, Books,Articles
400w power inverter
The popular IC LM317 is used by these circuits.
For you make project easily with PCB.
Power amplifier with PCB easy to build
Small Amplifier Circuits
The multi-purpose Amplifier using TDA2030 (15Watt OTL with PCB easy build)
Power Amp Super Bridge 120W by IC TDA2030 (at 2 ohm speak)
CAR Power Amplifier