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By that I do not mean that Jacbk will be one of them.

False triggering of a 555 timer

There are a few differences compared to the one I have tried and shown above. Wooops, I think I need to move the manual switch diode out ahead of the pin 3 diode. Is a little 9V battery able to produce enough power to drive the motor?

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.

Way too low for most Mosfet gates. Articles Top Articles Search resources. Your schematic does not show a part number for your Mosfet. Just saying hello Started by MichaelaJoy Yesterday at 6: The diagram was only to suggest a way to manually turn the pump on – yes a complete redesign is necessary.

For a better experience, please enable JavaScript in your browser before proceeding. Forums New posts Search forums. Nowhere says the size of the 9V battery.


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. Click here to register now. Started by fastline Yesterday at 8: The following posts were split off from the following old thread: By continuing to use this site, you are consenting to our use of cookies. I think even 10K’s would work, someone out there would know. Maybe the little 9V battery “falls on its face” when the high starting current of the motor causes its voltage datasheer drop which causes a false trigger of the ?

I can tell by the sound of the pump, and allot less flow is being produced.

Somewhere it says the motor is a 6V motor so maybe 9V is too much for it. 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?

And yes, we need to know the spec of the pump motor With a 5V supply the datasheet of datashet ordinary shows that its output goes as high as only 3. At the time I didn’t have the manual switch installed. Thanks Aardy, I’m kind of a newbie at this. Electro Tech is irvz30 online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.


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Is this what you mean? Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at To be honest, the LM isn’t really needed, it could be run directly off the battery.

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Your pump needs a much higher current. 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. Media New media New comments Search media. OP is commonly used around here in the forum.

Thread starter jacbk Start date Mar 6, Last edited by a moderator: You must log in or register to reply here. Thanks for the schematic. In fact, always check datasheets I will give this a shot.

IRFZ30 Datasheet PDF –

I’ve read so many threads where the original OP is OP right? Potentiometer Questions Started by norbss Yesterday at I am using a ohm resistor ahead of the diodes because that is what I have. False triggering of a timer.

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