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  • Analog Output - Convert PWM to Voltage

    Where a circuit like this starts getting really useful is when you are using 2-wire BLDC/brushless motors (example 2-wire brushless cooling fans and blowers, being used for cooling systems in 3D printers).In these brushless fans and motors, the two wires feed into a PCB built into the motor that controls how the motor is commutated (how the coils are energized in sequences to make the motor rotate). Advantage = quieter and longer lived motors and easy to power (you do not need to incorporate an ESC circuit, just power them up, and there are no brushes which can fail, generate dust, and be electrically noisy). Disadvantage: PWM mucks up how the commutator circuit in these brushless motors work (turning power ON & OFF affects the PCB/circuit).For brushless motors and fans, they are ...

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    Where a circuit like this starts getting really useful is when you are using 2-wire BLDC/brushless motors (example 2-wire brushless cooling fans and blowers, being used for cooling systems in 3D printers).In these brushless fans and motors, the two wires feed into a PCB built into the motor that controls how the motor is commutated (how the coils are energized in sequences to make the motor rotate). Advantage = quieter and longer lived motors and easy to power (you do not need to incorporate an ESC circuit, just power them up, and there are no brushes which can fail, generate dust, and be electrically noisy). Disadvantage: PWM mucks up how the commutator circuit in these brushless motors work (turning power ON & OFF affects the PCB/circuit).For brushless motors and fans, they are far better off when powered by continuous DC signals instead of PWM, and controlled by changing the voltage levels instead of using PWM signals.

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  • Meek_The_Geek commented on Dan Chen's instructable How to Use Bluetooth 4.0 HM10 11 months ago
    How to Use Bluetooth 4.0 HM10

    Where did you buy your hm-10 modules. I had a horrible problem with getting fakes online. Also, the voltage level question....You are using a FTDI cable that operates at 5 VOLTS. Do you need to use a voltage divider circuit (1k ohm/2k ohm) to bring down the voltage level to 3.3V at ftdi-TX/hm10-RX.I have to ask because i had blown up several hm-10 modules (and a usb aerial module) before figuring this out

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