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Diode and Mosfet size for 24 volt DC Siren
Yes the 5V regulator is after the LM2896 safety diode in case I reverse the input 24V supply while playing around with testing the finished circuit board.  
Monday, 21 December 2020 - 20:04
Diode and Mosfet size for 24 volt DC Siren
I do have 10x10 single side pcb it was what I was going to use , I have a printing company and we had some of this plastic stock so I tried it. It’s working fine though, when I...
Saturday, 19 December 2020 - 16:14
Diode and Mosfet size for 24 volt DC Siren
Here is an old video of some ir sensors I made that I used for a couple of CNC machines I made and refurbished. I designed and built this CNC , i used aluminum frame and a mold...
Friday, 18 December 2020 - 16:43
SparkFun Tiny Programmer
Why did you buy a USBTiny ?   I have a dragon set up for HV programming I am using but when flashing it stops half the time saying voltage is low, I press continue and it...
Thursday, 17 December 2020 - 18:09
Diode and Mosfet size for 24 volt DC Siren
DocJC, I will dial the output up to 7V its got input 3v to 40v and output 1.5 to 35V I have tried using just the 5V regulator on a breadboard but with a potential of about 500ma I...
Thursday, 17 December 2020 - 16:08
Diode and Mosfet size for 24 volt DC Siren
I guess staying up past 2am now days I should do less of. :)   Yes was set at 1x instead of 10x on the probe. Yes I forgot all about the clamping diode in mosfet's...
Thursday, 17 December 2020 - 07:27
Suggestions for components reading speed of quad copter roters.
That works great. Looks like 29,400 RPM is about maximum speed of the rotation. I better stop doing math in my head, I initially was thinking 3us between pulses.
Friday, 4 December 2020 - 04:46
Protecting components when AVR malfunctions
https://electronics.stackexchange.com/questions/28251/rules-and-guidelines-for-drawing-good-schematics Just found this, looks like a good starting point.
Friday, 20 November 2020 - 00:30
Protecting components when AVR malfunctions
"Remember left to right top to bottom. "   I never learned the proper way to design schematics. Any suggestions on books I might learn the proper way? I have the same...
Thursday, 19 November 2020 - 18:54
Protecting components when AVR malfunctions
V1 is simply a representation of a pulse high from the AVR pin. V2 is the 5V supply. Just remember I never used this software and my interest was to see how the clamping would...
Wednesday, 18 November 2020 - 22:50
Protecting components when AVR malfunctions
Kartman wrote:Your circuit doesn’t make much sense to me. Apart from being drawn in a manner that is difficult to interpret, why the 5ohm resistor in the drain? What do you want...
Tuesday, 17 November 2020 - 15:58
Protecting components when AVR malfunctions
I watched a Youtube of a guy using just a single LED but he used a lens and tube with the sensor in the center basically a monocular telescope. I bought one on Amazon for $18.00...
Tuesday, 17 November 2020 - 06:27

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