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Thank you all answers, I read the wikipedia page again and you are right single phase syncoronius motors can start any direction unless prevented doing so.
Hello
Even though i am not sure this is the correct place to ask this question but i hope someone helps me.
Today one of my friends said some synchronous motors change its rotation direction under heavy load. I just read as many document i can read but haven't seen anything about it. Is it...
Thanks for advice :) Lesson already learnt. I am new at power electronics and getting experience from mistakes. But for sake of curiosity i will try dimmer and for long term operation i will order a transformer. Case closed.
I understand your concerns but i will use it to power my personel workbench, neither commercial nor critical application, and i will always be there when the coil is energized. I totally agree with you, i expect noise because of switching. It will be just an experiment not a suggestion or tutorial.
Thanks for reply, i know dimmer doesnt lower the voltage, it changes the on/off time, thus changes total energy consumed over time. I can design a new dimmer circuit with snubber for inductive loads.
The question is, can the coil endure peak voltages in a short while?
Hello everybody, first i apologize if this a repetitive question, i checked the forum and couldnt see a relevant topic.
Recently i bought a contactor for my project but accidentally i bought one with a 24vac coil instead of 220vac coil. I tried to exchange it but no luck.
I have an option...
Thanks for answer
Pic18f25k20 draws minimum current when operating 1.8v but how I can manage it to run lowest power state while applying more than 1.8v
Thanks for advice
My oled vdd is currently connected mcu pin and both operate 3.3v when I use different voltages, I have to switch on-off oled via transistor
Before using regulators I will try to adjust oled's internal boost pump output voltage by changing external boost pump capasitors. Maybe...
I completely agree that is why I connect oled vdd to one of cpu's io pin. When it it is necessary, mcu power it and init. My question is not about my components it is abot which converter comsumes less energy
The microcontroller does nothing most of the time, it sleeps and it wakes up after 5 minutes read some values and sleeps again. The oled only works if user wants to see values. Most of the time oled is powerless at all
Power cosumption is not more than 10ma @3.3v, but the mcu datasheet says mcu consumes 100na @1.8v at sleep state when ext 32khz osc operated, there is much difference so I need to reduce the voltage.
Hello I am designing a battery operated circuit and it consists of one pic 18f25k20 chip and an oled display. Here is my question,
The mcu is preferably works at 1.8v for power saving, and oled runs at 3.3v I made a quick search on the net, it seems not possible to make oled run under 3.3v...
Once, I made a higschool project on controlling 3 phase induction motors and I used mc3phac ic from freescale. It is very easy to control motors with that ic if you have a proper ipm. The reference design is in datasheet. But I don't know if that chip is still in production
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