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50 On Semiconductor 7809CT 9-Volt 1-Amp Voltage Regulator
This is a Brand New Lot of 50 On Semiconductor 7809CT 9-Volt 1-Amp Voltage Regulators. The .pdf has plenty of circuit recipes from the switching regulator (to introduce you to switching power supply design and construction) to a negative output voltage source circuit to a ripple rejection ckt.
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