1: Circuit diagram of the simple power supply with adjustable voltage and current with LM350 It is built around bridge rectifier (BR1), adjustable voltage regulator LM350 (IC1), transistors BC327(T1) and BC337(T2), and a few other components. The circuit diagram of the power supply is shown in Fig. This power supply may be useful in laboratories and for hobby projects. LM350 has higher power dissipation as compared to commonly-available adjustable voltage regulator LM317 and, hence, has higher guaranteed output current. This article presents a simple power supply using an adjustable regulator LM350 that provides variable output up to 17V and maximum output current below 2A. Sometimes a simple analogue power supply with adjustable output voltage and adjustable current-limiting function is needed.
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