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    Help to Design EGR Valve Simulator- Cheater

    I would be interested to see the map before and after. Can you take a picture of the computer screens and post them?
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    RC Rocket Pod

    That seemed like a good idea you had, so I tried it. With a 1 ohm resistor, it simply opened. With a 5 ohm it worked great! With a 12V battery it used 2.5 amps. Trouble is it took a couple of seconds to open. This probably would not work with a 9V battery.
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    Electronic Simulation Software

    I downloaded that, and it looks very good, but I can't get it to work on my computer. There is only a list of files and some of them won't open on my computer. Vista O.S. Will I be a pirate by using this if I could get it to work?
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    Video Switcher

    Sorry that my first link didn't work. http://www.kpsec.freeuk.com/555timer.htm Maybe if you study the 555 circuits you can figure out how to make a circuit work for you. If you go to an electronic supplier you can get a breadboard that will allow you to plug in components to test out your...
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    RC Rocket Pod

    I think a 4017 would work for this. It is a decade counter divider that will change it's output with each pulse. On the forth output pin you would hook to the reset pin. A 4017 can be used to divide by any number up to 10. A NTD3055L mosfet transistor could be used to fire the match. You can...
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    quadrature singal

    Be careful not to produce too much sin, :eek: you will have to ask Jesus to forgive you, if you want to go to heaven. ha Sine waves I know. Cosines, not much. Someone smarter than me will have to help you on that. :D
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    Video Switcher

    I think a 556 set up as two monostable circuits would work. The outputs could control a relay or transistor to turn on and off your cameras. You would feed back the outputs to the trigger or the opposite timer. I don't know how to draw schematics on the computer but maybe someone else could draw...
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    Help to Design EGR Valve Simulator- Cheater

    I am very interested too, to know the frequency of the egr actuator is. You said that the only difference between your 80hp motor and the 100hp motor, was in the ECU program. I wonder if a cheater box could be created to increase the hp. to 100? Can you show any maps of the injector solenoids...
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    diode bridge

    If they are connected in parallel then the one that is producing more power will motor the weaker one. If they are connected to a load, however, the more powerful one will carry most of the load and will therefore slow down till the weaker one take up a smaller portion of the load. This is the...
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    diode bridge

    I believe those generators are DC generators. I don't think there would be any problem hooking them in series or parallel as long as they were putting out approximately the same voltage and turning at the same speed. You could hook them together with a small load to test. Then if everything...
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    Help to Design EGR Valve Simulator- Cheater

    This has been a very interesting thread! I think if the frequency of the computer output was known and the pinout was known, it could have been designed to mimic the actual egr valve exactly. I wonder if the frequency changes or the pulse width changes? It would be interesting to see the signal...
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    Clock Project

    Here is a place to learn about 555 ICs. http://www.kpsec.freeuk.com/555timer.htm
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    diode bridge

    You are right. You can't just hook AC generators in series or parallel easily, without BIG sparks. It can be done however, the power companys hook in parallel every day. You can do it too. Just hook one side of the generators together and then hook a 100 watt lite bulb between the other side...
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    Clock Project

    Take the signal from the switch and send it to a 555 set up as a monostable oscillator. You can adjust the on time to whatever you desire.
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    Speed controller for valves

    Now that I think about it, perhaps a relay is your best choice. Just trigger it with a 555. Do a search for 555 circuits.
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    Speed controller for valves

    Are you sure it's AC? A mosfet won't work on AC. You will need a triac. Do a search for 555 and also flip flops and triacs.
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    How do drive a power mosfet gate

    I was wrong about putting a diode across the transistor and with your high voltage transistor it probably is not needed. Some thing is wrong with your driver I think. Is it turning completely off? Have you checked the voltage at the gate with no drive? I should be 0. If the transistor is on...
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    How do drive a power mosfet gate

    Wow! one amp of current! I wonder how this guy is driving a mosfet with just a 555 if it needs so much power? :) I do see that I was wrong about the diode across the transistor. I believe that with that high voltage transistor that he is using, he doesn't need a diode anyway. Some mosfets have...
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    How do drive a power mosfet gate

    Maybe you don't need a gate resistor, but if your transistor shorts it will take out the driver too. With a 47 ohm resistor it would allow 250 ma of current. Will your driver take that much? Not sure why you can't go with a higher ohm gate resistor. A mosfet doesn't take much power to drive it...
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    How do drive a power mosfet gate

    If you only have 12V on the coil you need a lower voltage mosfet. Your mosfet has .09 ohms on resistance. A lower voltage mosfet only has .01 ohms and therefore less heat. It sounds like you are not turning the transistor completely on and therefore the transistor has to dissipate more heat...
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