JLCPCB Prototype for $2(Any Color): https://jlcpcb.com
Based around a 555 timer (dual diode PWM configuration) and a MOSFET - this motor speed controller is rated at 5A (despite having a 1.85A fuse).
Based around a 555 timer (dual diode PWM configuration) and a MOSFET - this motor speed controller is rated at 5A (despite having a 1.85A fuse).
The 3-15v jumper on the back is there for lower voltages! You leave it unsoldered for higher voltages ~12-35v and are suppose to solder the two pads together to control lower voltage ~3-15v! The board is in-fact rated for up to 35v.
CAN YOU PROVIDE SWISS SAP 0985 BLDC CONTROLLER REVERSE ENGINEERING
Anyone have a link to this board?
i have one of these 555 PWM controllers on an almost identical green board, with a 78L05 in place of the 7812. looks like there might be a few versions
Wouldn't it be easier to desolder all the components to get a better look at the board?
I'm guessing poly fuse is being duty cycled hence it rated for higher load, what's your thoughts Juian. Enjoyable video though, ta.
reverse engineer videos are some of my favorites. Great job Julian.
Somehow that controls a motor speed???
He said complete, but he was guessing a lot, as he shows the blue led has no power + the regulator no negative connection, all he had to do to find where things go (under the speed control) was to pickup his Ohm meter and trace them out that way. I use this same circuit to PWM control LED lamps brightness. Ron W4BIN
Are you paying royalties to EEVblog for your use of DaveCAD? 🙂
I almost picked up some of these to run LED strips, but the reviews didn't seem…. great…. Figured I'd just make my own out of prototype board.
Glad to see a video on one by someone that knows what they're doing. 🙂
I have made something similar myself, for use with acid dosing pumps on a machine that crunches corn, mine is a bit smaller, uses a THT IRFZ44N, so you can easily add a heatsink, the mosfet is driven through a dedicated driver chip and it has a schotky between the drain and source of the transistor, since it was designed to be installed by me, I made it 3 wire (wires are soldered on, instead of connectors) it has GND, 12V in (or anything within the 555s working range) and motor negative, I have to put another diode on the motor, but it can be pretty much at the motor itself (which is better than putting it all the way over on the PCB) and the power switch is separate, it also allows me to use a 24V motor, with the 555 having it's own supply, potentially allowing to connect even a 50V motor (or whatever the IRFZ44N max voltage was)
Can you bypass the pot with an ardunio ? what connections would you use ?