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Consider some small 0. Is fatasheet 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 ?
Potentiometer Questions Started by norbss Yesterday at I had false triggering on my timer setup then I added a microF cap. 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.
Thanks for the schematic. I think even 10K’s would work, someone out there would know.
Wooops, I think I need to move the manual switch diode out ahead of the pin adtasheet diode. Articles Top Articles Search resources. In fact, always check datasheets Forums New posts Search forums. The diagram was only to suggest a way to manually turn the pump on – yes a complete redesign is necessary. There are a few differences compared to the one I have tried and shown above.
I will give this a shot. To participate you need to register. False triggering of a timer.
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By that I do not mean that Jacbk will be one of them. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at I’ve read so many threads where the original OP dattasheet OP right?
OP is commonly used around here in the forum. Your pump needs a much higher current. Keep it simple and cheaper! To be honest, the LM isn’t really needed, it could be run directly off the battery. Perhaps a bipolar transistor would be better? Media New media New comments Search media. Started by fastline Yesterday at 8: Last edited by a moderator: And yes, we need to know the spec of the pump motor 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.
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I can tell by the sound of the pump, and allot less flow is being produced. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Way too low for most Mosfet gates. You must log in or register to jrfz30 here.
Click here to register now. 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. Now when I use the manual switch it sets off the timer. 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. I’m not an electro-tech guy but a mechanical engineer, way over my head. Somewhere it says the motor is a 6V motor so maybe 9V is too much for it.
Boncuk shows a schematic that isolates the trigger pin 2 of the timer with a transistor. Your schematic does not show a part number for your Mosfet. 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?