001: DC power supply


Making of a DC power supply with good voltage regulation became easy after the famous 723 became available. Smaller one is a power supply of 8-23V 3A, and another with an ammeter is 15V 10A. 723 regulator IC is chosen again, and 4 parallel 2N3055 is used in the current amplification circuit. These were made in 1976 and 1978. Further, a digital voltage indicator was recently added.





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