Got a pwm project on the breadboard. Replaced the diodes with red and green leds. When the battery switch is on they both glow and the brighter the green diode the higher the duty cycle. Just using a tactile switch to gate of mosfet.
PWM mod project.
- Thread starter Robert Wilcoxson
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What I have been working on 
Thinking about switching the SMD 555 to a Dip 8 socket so you can replace the 555 if needed.
Measures 13mm x 25mm
Dan
Thinking about switching the SMD 555 to a Dip 8 socket so you can replace the 555 if needed.
Measures 13mm x 25mm
Dan
Ok added a Dip 8 socket and re-routed the traces...
I like the diodes on the board vs ones I have seen without them, all the chips are SMD vs through hole with the exception of the DIP 8 Socket.
The "S" by the + and - is to the switch which controls the gate of the mosfet.
About 10 bucks a piece if I have them made unpopulated.
Dan
I like the diodes on the board vs ones I have seen without them, all the chips are SMD vs through hole with the exception of the DIP 8 Socket.
The "S" by the + and - is to the switch which controls the gate of the mosfet.
About 10 bucks a piece if I have them made unpopulated.
Dan
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@david4500 Nice the "s" is the key in the part number on that chip, nice find. One less solder point hahahaha
Too bad I ordered 20 boards yesterday! AH well no biggy as either way will work, will keep it in mind for the future revision.
Dan
Too bad I ordered 20 boards yesterday! AH well no biggy as either way will work, will keep it in mind for the future revision.
Dan
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Lol, good idea on the fuses. My first try at soldering up a buck regulator circuit based on the mc34063 on stripboard turned the copper trace of the board into a fuse. Apparently 35 amps at 7 volts is a bit much for proto board. I've since scraped that concept as too complicated. An atomizer doesn't care whether it gets clean dc or a pwm equivalent.
The whole point of the mosfet is the board does not get that many amps drawn through it, with a 195a 40vdc N channel mosfet, the board for the PWM only gets max battery voltage with no load.
Dan
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