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This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Nowhere says the size of the 9V battery. I had false triggering on my timer setup then I added a microF cap. And yes, we need to know the spec of the pump motor In fact, always check datasheets Articles Top Articles Search resources.

даташит IRFZ30 PDF ( Datasheet )

Is a little 9V battery able to produce enough power to drive the motor? I can tell by the sound of the pump, and allot less flow is being produced.

Welcome to our site! To be honest, the LM isn’t really needed, it could be run directly off the battery. 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? Urfz30 edited by a moderator: Started by fastline Yesterday at 8: Just saying hello Started by MichaelaJoy Yesterday at 6: False triggering of a timer. By that I do not mean that Jacbk will be one of them. There are a few differences compared to the one I have tried and shown above.


I’m not an electro-tech guy but a mechanical engineer, way over my head. The following posts were split off from the following old thread: Your pump needs a much higher current. By continuing to use this site, you are consenting to our use of cookies. Forums New datashfet Search forums.

False triggering of a timer | Electronics Forum (Circuits, Projects and Microcontrollers)

For a better experience, please enable JavaScript in your browser before proceeding. At the time I didn’t have the manual switch installed. Media New media New comments Search media. 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.

Consider some small 0. Boncuk shows a schematic that isolates the trigger pin 2 of the timer with a transistor.

Way too low for most Mosfet gates. To participate you need fatasheet register. Thanks Aardy, I’m kind of a newbie at this. OP is commonly used around here in the forum.

Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at The diagram was only to suggest a way to manually turn the pump on – yes a complete redesign is necessary. Your schematic does not show a part number for your Mosfet. 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.

IRFZ30 Datasheet PDF – International Rectifier

You must log in or register to reply here. Click here to register now. 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 now low-current dattasheet.


Is this what you mean? I think even 10K’s would work, someone out there would know. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

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 ? Somewhere it says the motor is a datashdet motor so maybe 9V is too much for it. With a 5V supply the datasheet of an ordinary shows that its datasyeet goes as high as only 3. I am using a ohm resistor ahead of the diodes because that is what I have. Perhaps a bipolar transistor would irfz03 better?

I will give this a shot. Thanks for the schematic. Now when I use the manual switch it sets off darasheet timer. Wooops, I think I need to move the manual switch diode out ahead of the dattasheet 3 diode. Potentiometer Questions Started by norbss Yesterday at Thread starter jacbk Start date Mar 6, Both the schematics in the 1st post of this thread show a 9v battery, but I will wait until jacbk replies – at least we are not wasting our time.

I certainly will not, I appreciate all the help I can get. I’ve read so many threads where the original OP is OP right?