LM317T Voltage Regulator with Pass Transistor

Homemade: A simple tester for Electronic Air Pressure Valves. Easy to make with a few components like: 1 LM317T (to get +10V) 1 Potmeter 10K (to regulate 0-10V to the input of the airvalve) 5 Resistors 3 Leds All the written on the front is just a remembrance of how to adjust this particular valve, and what the alarm codes are. For people that want to make this: Setup a LM317T circuit with an output of 10V. Connect the wiper of the potmeter with pin 2 (Left of notch) of the valve. The remaining 2 contact of the potmeter; 1 to mass and 1 to 10V (output 317T) Other pins of valve socket: Pin 1 +24Vdc-----( Right of notch) Pin 3 Mass--------(Left under notch) Pin 4 Analog output (Right under notch) connect a led with resistor Pin 5 Digital output (Center) connect a led with resistor



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