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Thanks for the schematic. False triggering of a timer. Nowhere says the size of the 9V battery. I am using a ohm resistor ahead of the diodes because that is what I have.

IRFZ30 Datasheet PDF – International Rectifier

I will give this a shot. Is a little 9V battery able to produce enough power to drive the motor? The following posts were split off from the following old thread: Your pump needs a much higher current.

Somewhere it says the motor is a 6V motor so maybe 9V is too much for it. Way too low for most Mosfet gates. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.

Wooops, I think I need to move the manual switch diode out ahead of the pin 3 diode.

New Jersey Semiconductor IRFZIRFZ32 datasheet pdf

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Potentiometer Questions Started by norbss Yesterday at Started by fastline Yesterday at 8: Jacques, Instead of a relatively high datashee switch to operate the pump motor, why not just provide a low-current with series resistor input to the MOSFET?

OP is commonly used around here in the forum.

IRFZ30 MOSFET. Datasheet pdf. Equivalent

Perhaps a bipolar transistor would be better? Is this what you mean? Last edited by a moderator: I had false triggering on my timer setup then I added a microF cap. The diagram was only to suggest a datssheet to manually turn the pump on – yes a complete redesign is necessary.

On the LM you have a capacitor which is wrong in dstasheet 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.

Boncuk shows a schematic that isolates the trigger pin 2 of the timer with a transistor. And yes, we need to know the spec of the pump motor You must log in or register to reply here.

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. Click here to register now. Just saying hello Started by MichaelaJoy Yesterday at 6: Your schematic does not show a part number for your Mosfet. Media New media New comments Search media. Welcome to our site! I think even 10K’s would work, someone out there would know.


I’m not an electro-tech guy but a mechanical engineer, way over my head. I certainly will not, I appreciate all the help Xatasheet can get. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

Consider some small 0. 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 ? 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.

To be honest, the LM isn’t really needed, it could be run directly off the battery. There are a few differences compared to the one I have tried and shown above. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at