LM317T Voltage Regulator with Pass Transistor

Modern automotive pressure sensors are of up most importance, whether gasoline or diesel engines. Did you know that a faulty HVAC or air conditioning high pressure sensor can make the engine not start? It so happens that on some vehicles (Cadillacs) the high pressure sensor is connected to the other sensor voltage reference line. So a shorted sensor will render the crank sensor inoperable. Get the scoop here on pressure sensors. They're used in injection systems, transmission, HVAC and many other systems. Presented using advanced software CG animation technology to help you understand. Part of our wiring diagram and electronic series shown here on this channel. Enjoy...



http://www.youtube.com/watch?v=_xSyhv6pWT0&hl=en

This gun is now for sale: I hardly used it after the tuning while moving my attention to airguns from bb. Please email me at markqian@hotmail.com if interest. Here are the modification I did on this gun: 1). Replacing the barrel with JC. This is the first modification I did. It sounds easy but not really to me when I was really new to the gun. I eventually ended up with disassembled the gun completely. The good fact was that it resulted me understand more about the gun. I have been reassembled this gun for more than 15 times. Disassembling the gun not-intentionally encouraged me go further to replace the chip. 2). Replacing the chip for full auto. This is also a hard one. After disassembling the gun, I came up with the idea of replacing the chip. It looks straight forward in the demo video but it is harder when you really do it. You could over heat a component or permanently cut out part of the circuit - I did and make it up when soldering. Warning: anything could happen after you reassembly your gun...What happened to me was the magazine was no longer working. It first kept loading as long as the power is on without stopping and eventually stop working/loading completely (lost all the power). I got it fixed by getting a chip replacement (thanks for DrozdMax.com with a free replacement). 3). Using 2 x 3.6v (close to 4v when full) + 4 x 1.5v batteries = 14v. This is the easiest task. You just need to decide what voltage you want. I don't want to get too close to the limit ...



http://www.youtube.com/watch?v=4WJY32jYwJY&hl=en

Deals with the operation of the fuel pressure limiter or regulator. Also explains safety issues in dealing with newer piezoelectric Diesel injection systems. Common rail Diesel fuel injection is now the state of the art in engine injection. The Bosch Piezoelectric (crystal) injector operates using a crystal stack, usually Quartz, that changes size when energized. The piezoelectric effect states that when a crystal such a Quarts is squeezed an electric current is generated. By the same token, when electricity is applied to the crystal is changes shape. This minute change in crystal size is used to trigger a small fuel chamber on and off. In turn, this chamber creates a pressure differential at the top of the injector which make it open and close. See further information here. Presented using advanced software CG animation technology to help you understand. Part of our Diesel and electronic series shown here on this channel. Enjoy...



http://www.youtube.com/watch?v=niYW9pkPCH4&hl=en

http://www.youtube.com/watch?v=dBbuG4-fqiQ&hl=en

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



http://www.youtube.com/watch?v=pQycLr7hqSw&hl=en

Crappy quality vid from my BlackBerry of the bike idling, showing oil pressure, voltages, and the voltage regulator.



http://www.youtube.com/watch?v=AVwrmArIlVc&hl=en

I've got the voltage regulator turned right down. You can't see it well, but the pressure gauge is pegged at nought. Even so the steam regulator has to be closed down to really slow the engine. Towards the end I turned the power up to max to see how long it would take for steam to build while running flat out. It took longer than the movie ;)



http://www.youtube.com/watch?v=BjsHYChB5Rc&hl=en