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Thanks Aardy, I’m kind of a newbie at this. I will give this a shot. Perhaps a bipolar transistor would be better? By that I do not mean that Jacbk will be one of them. 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.
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?
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Maybe the little 9V battery “falls on its face” when the high starting current of the motor causes datashee voltage to drop which causes a false trigger of the ? Now when I use the manual switch it sets off the timer.
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Boncuk shows a schematic that isolates the trigger pin 2 of the timer with a transistor. 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. Keep it simple and cheaper! The following posts were split off from the following old thread: There are a few differences compared to the one I have tried and shown above.
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I had false triggering on my timer setup then I added a microF cap. I think even 10K’s would work, someone out there dafasheet know. Media New media New comments Search media. In fact, always check datasheets On the LM you have a capacitor which is datassheet 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.
I’ve read so many threads where the original OP is OP right? Last edited by a moderator: Way too low for most Mosfet gates. OP is commonly used around here in the forum. Somewhere it says the motor is a 6V motor so maybe 9V is too much for it. I am using a ohm resistor ahead of the diodes because that is datasheeg I have.
Welcome to our site! I can tell by the sound of the pump, and allot less flow is being produced. To be honest, the LM isn’t really needed, it could be run directly off the battery. Thread starter jacbk Start date Mar 6,