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Thanks for the schematic. In fact, always check datasheets Keep it simple and cheaper! This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.

Perhaps a bipolar transistor would be better? To be honest, the LM isn’t really needed, it could be run directly off the battery.

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With a 5V supply the datasheet of an ordinary shows that its output goes as high as only 3. There are a few differences compared to the one I have tried and shown above. Your schematic does not show a part number for your Mosfet.

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. Your pump needs a much higher current. Articles Top Articles Search resources. By continuing to use this site, you are consenting to irf3z0 use of cookies. 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 datasheeet has a capacitor to ground.


IRFZ30 NTE Equivalent NTE N channel MOSFET – Wholesale Electronics

Way too low for most Mosfet gates. I will give this a shot. I’m not an electro-tech guy but a mechanical engineer, way over my head.

Nowhere says the size of the 9V battery. Is a little 9V battery able to produce enough power to drive the motor? 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 ? You must log in or register to reply here. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at 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 switch.

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?


Now when I use the manual switch it sets off the timer. Somewhere it says the motor is a 6V motor so maybe 9V is too much for it.


And yes, we need to know the spec of the pump motor The diagram was only to suggest a way to manually turn the pump on – yes a complete redesign is necessary.

I think even 10K’s would work, someone out datasjeet would know. Just saying hello Started by MichaelaJoy Yesterday at 6: Last edited by a moderator: I certainly will not, I appreciate all the help I can get.

I can tell by the sound of the pump, and allot less flow is being produced. Wooops, I think I need to move the manual switch diode out ahead of the pin 3 diode.

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