Summary: I. Introduction to LM317 Output voltage: 1.25-37V DC; output current: 5mA-1.5A; chip with overheat, overcurrent, short circuit protection circuit; maximum input-output voltage difference: 40V DC, minimum input-output voltage difference: 3V DC; use environment Temperature: -10-+85 °C. For information on LM317, please refer to: http:// The power circuit produced by LM317 can be found in the PDF document (click the PDF file to download)
Features
A push button switch is a switch that has a knob that you push to open or close the contacts. In some pushbutton switches, you push the switch once to open the contacts and then push again to close the contacts. In other words, each time you push the switch, the contacts alternate between opened and closed. These types are commonly called latching switches. There are also Non latching push button switches that only maintain the switch contacts when the switch is help in position. Once the switch is let go, the current is broken and the switch turns off. Push switches are usually a simple on-off switch.
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The LM317 is one of the most widely used power supply integrated circuits. It not only has the simplest form of a fixed three-terminal regulator circuit, but also has an adjustable output voltage. In addition, it has the advantages of wide voltage regulation range, good voltage regulation performance, low noise and high ripple rejection ratio. The main performance parameters are as follows. 
Figure 1 shows the outline and pinout of several commonly used (different package types) LM317.