View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000228 | Microcontrollers, shields, automation, arduino | [All Projects] General | public | 2017-05-12 09:33 | 2017-05-15 16:15 |
| Reporter | DigitalMy | ||||
| Priority | normal | Severity | minor | Reproducibility | have not tried |
| Status | assigned | Resolution | open | ||
| Summary | 0000228: DC motor speed control (12V) by temperature (with Digispark) | ||||
| Description | Adjust cooler fan speed from zero depend on temperature of object. Parts: 1. microcontroller with PWM out and analog in, ATtiny85 2. MOSFET /IRF520 module 3. termistor /NTC100K 2. power level converter AMS1117-5.0 (no need for Digispark) | ||||
| Additional Information | Also test dual MOSFET module | ||||
| Tags | No tags attached. | ||||
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Digispark has power converter ST 78M05 on board, it's 3 pins on side. V(in) can be 7V to 24V, so, perfect range for this purpose Out to ATtiny85 chip is 5V. So, connect : GND - to power in and MOSFET S(3) VIN - to power in and load (+) PWM P(1) - to MOSFET G(1) P(0) - to thermistor 5V - to thermistor MOSFET D(2) to load (-) |
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IRF520 MOSFET Gate threshold voltage below 4V Drain current (continuous) 10A Drain-source voltage 100V Switch time 50ns DC motor (fan) is 12.0V 0.12A |
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Tested dual D4184 MOSFET (paralleled) module HW-0517, up to 15A load It has 6 pins: DC (+) in, up to 35V, min 5V DCC (+) out *direct to in - to load DC (-) in, G DC (-) out to load Ground from controller *direct to in PWM trigger to controller, up to 20kHz |
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PWM sounds motor up, add RC filter, or simply grow frequency of hardware PWM. Same sketch with Uno made https://www.youtube.com/watch?v=cU9oF3OKIlY |