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It might be necessary to use two diodes to form a simple OR function, but you might get away with changing the gate resistor to say 1K and having another 1K via your vatasheet low-current switch. Is this what you mean? Boncuk shows a schematic that isolates the trigger pin 2 of the timer with a transistor. Thread starter jacbk Start iffz30 Mar 6, Potentiometer Questions Started by norbss Yesterday at Welcome to our site! On the LM you have a capacitor which is wrong in parallel with the ohm resistor from the output to the ADJ pin but the datasheet has only the resistor or the resistor with an added parallel diode when the ADJ pin has a capacitor to ground.
Keep it simple and cheaper! Consider some small 0. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Started by fastline Yesterday at 8: Wooops, I think I need to move the manual switch diode out ahead of the pin 3 diode.
OP is commonly used lrfz30 here in the forum. With a 5V supply the datasheet of an ordinary shows urfz30 its output goes as high as only 3.
Irvz30 that I do not mean that Jacbk will be one of them. I am using a ohm resistor ahead of the diodes because that is what I have. I tried doing the same thing with mine to see if it was helpful in regards to the effect of the manual switch but it was not.
Somewhere it says the motor is a 6V motor so maybe 9V is too much for it.
Replacing a 4 pin leaded eatasheet with a 2 pin Started by gkmaia Yesterday at I can tell by the sound of the pump, and allot less flow is being produced. To be honest, the LM isn’t really needed, it could be run directly off the battery.
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You datashert log in or register to reply here. At the time I didn’t have the manual switch installed.
There are a few differences compared to the one I have tried and shown above. Perhaps a bipolar transistor would be better? Your schematic does not show a part number for your Mosfet. I will give this a shot.
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I certainly will not, I appreciate all the help I can get. The diagram was only to suggest a way to manually turn the pump on – datasheeet a complete redesign is necessary. The following posts were split off from the following old thread: I had false triggering on my timer setup then I added a microF cap. False triggering of a timer.
IRFZ30 Datasheet PDF – International Rectifier
Now when I use the manual switch it sets off the timer. Jacques, Instead of a relatively high current switch to operate the pump motor, why not just provide a low-current with series resistor input to the MOSFET? Is a little 9V battery able to produce enough power to drive the motor? Media New media New comments Search media. Your pump needs a much higher current. Just saying hello Started by MichaelaJoy Yesterday at 6: Forums Irrfz30 posts Search forums. Maybe the little 9V battery “falls on its face” when the high starting current of the motor causes its voltage to drop which causes a false trigger of the ?