picco-z MOSFET mod…
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I was having a look at the PCB last night on the doner heli that talldude gave me and I took some measurements. It looks like it was be possible to replace the stock BJT transistors (there’s 2) with the popular IRLML2502 MOSFET we use in the bit mosfet mod.
There are two trannys on the piccoz PCB. One controls the main rotor motor, the other controls the rear prop motor. These two are mixed signal controlled so an increase in acceleration in one results in an increase in accel in the other. (ie: to keep the bugger stable).
Turning left or right is just an adjustment to the speed of the rear prop. I tested this and look some measurements and everything seems to hold true.
Here’s the stock setup:
Here’s the mod setup, with two new IRLML2502 MOSFETS soldered in place of the stock transistors.
It wasn’t too hard. The tricky bit was splitting the foam body, but I got there in the end. Just make sure you use a SHARP hobby knife, this helps bigtime!
Once the PCB, lipo and frame are out of the body it’s quite easy to get to. You will need to unwind the little loom of wire that sits in front of the PCB (where you want to operate) to get to the transistors.
I just cut the stock transistors off and put on the MOSFETS.
I haven’t had much of chance top fly it that much yet.(did this mod at 1 am in the morning, lol…) Already it looks promising. There is definately more power. ie: a lower throttle setting now results in the same hover as a higher setting previously.
Climbing is a lot quicker as well! 😮
I also took the time to clean out and lube the main shaft bushings. also lubed the main motor and rear rotor motor again as well.
this ‘lil bugger is soo much fun…….!
ph2t.
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