1. DJZ

    Leakage Current in Single Phase AC Motor

    Hi all, I have a single phase motor (115VAC 1/4hp) that keeps failing our internal leakage current test. We are measuring about 0.1mA of leakage current when the pump is plugged in, but powered off. The only thing the the live is wired into is an IEC connector then into a two-terminal SPST...
  2. J

    Suitable replacement for THERMAL MAGNETIC OVERLOAD SWITCH on pottery wheel

    Hello, fairly new to all this but done my best to get to this stage! Im repairing a pottery wheel and am looking for a modern replacement for a STOPCIRCUIT GDU-2U-73-P1. As i understand this is a panel mount 2a, trip curve c, circuit breaker with an auxiliary contact. Looking through spec...
  3. M

    Motor blowing the start capacitor, now throwing sparks from centrifugal switch!

    Hi all, I got a Delta 50-761 dust collector second hand and it has been giving me trouble. It turns on, fan runs, but it blows the start capacitor within seconds. I replaced the capacitor and it did it again. I looked at the centrifugal switch, thinking it might not be functioning and causing...
  4. Choon Kwang

    Help - low side current measurement of motor via shunt and adc

    wlpThis circuit is a low side current measurement of a motor using a shunt resistor and adc of a mcu. However, I do not understand the reason or use for the 100k internal pull down resistor, 10k external serial resistor and the capacitor. Anyone can help?
  5. Jovanny-T

    Add a down limit switch to a hoist

    Hi, I have an electric hoist trupper brand, this comes with a control and a switch that disables the ascent after a certain point, I want to add another to disable the descent. I tried putting the switch between B and 10 but it disabled the up and made it go down if I pressed up or down. I...
  6. sstech

    replace the battery cell power source (1.2v) to 5v

    I am using one machine (which has a small motor) which has battery of 1.2v which got dead and i want to change the power source to USB. The battery is of 1.2V and 400mAh. Motor connected to works perfectly fine if provide the 1.2V from bench power supply. I want to use USB power supply instead.
  7. J

    How to Drive a brushless E Scooter Motor

    Hello Guys, I m searching for a Cheap Motor for an E Scooter project. I find this one...
  8. J

    Looking for a motor controller to implement between a 94V pace battery and a 24V transaxle motor?

    I have to use a 94V battery to power a 24V DC motor and looking for suggestions on a motor controller that will help with the buck converter aspect and in rush current of the motor? Im a student so still trying to learn the best way to do this and was told this may be the best approach? The...
  9. J

    Arduino PWM

    Hello, I have an arduino Uno that I am trying to use to control a 12v motor. I need to control this motor. I have tried using the analogWrite(); method, and also changed the frequency but still could not get my valve to move. This valve can be controlled via linbus or pwm according to the...
  10. Nikson420

    Wholesale, Good price??? or scam?

    Just found this on ali they said its wholesale action and they are in hurry to sell them all. Its that normal price or its really cheap? Please check - https://.aliexpress.com/e/_DBQRbZt I need around 100pcs. Any suggestions is welcome. Thanks!
  11. C

    Electronic Overcurrent Relay (EOCR) Settings

    Hi, To give you some background I am currently working on an Automated machine for Manufacturing that involves two air-blowers that are powered by 3-phase 208V power. The blowers are set-up in independent circuits with a Schneider 3DM2-WRDBWZ EOCR and 10A/20A MCB after the EOCR. One of the...
  12. WakelessFoil

    Motor Controller Mystery

    I have been working on an Electro-Arc tap burner in the machine shop. The power feed mechanism only works partially, as the feed-rate potentiometer seems to have no effect on the actual speed of the motor. We confirmed the potentiometer to be in working order so I believe there is a fault...
  13. roll332

    Motor Automation Diagram

    Hello! Im an indoor electrican apprenticeship student and I need help with solving a task we we're given, since I can't seem to figure it out. A little context too: on the photo you can see a motor diagram, the thing is, when u press both the start buttons and all the contactors go down, you...
  14. ShortCircuitJ5

    Battery, Light sensor and a mini motor?

    First the picture, because a picture is worth a thousand words. Is this possible? If the light is OFF, then the motor stops. Low light brigthness = low motor speed. High light brigthness = high motor speed. Thanks.
  15. Answerzzz

    How to translate a connection (Step Motor Driver)?

    I am following this connection to get a driver to an Arduino and a step motor. The original connection is this: Green wire --> Step Blue wire --> DIR Red wire --> +5V My driver, However, has different pins. How can I connect to my driver? My driver:
  16. T

    What are some easy ways to block over voltage and regen current from the load to the power supply?

    I have a power supply that automatically shuts off when an over voltage condition occurs. In my case, my load is a DC Brushless 3 phase motor (draws about 600 W) and it's triggering an over voltage condition for the power supply whenever I slow it down. If I don't care about efficiency and I'm...
  17. B

    Microelectronics Motorized Pinwheel proteus design

    I need to build the motorized pinwheel project in proteus. Arduino 328 should be used as seen in the 2nd photo. I will be grateful if you could help me.
  18. G

    Force alternator to supply current only in 1 direction

    I have searched all over and have not found an answer. I am a newbie, please bear with me, I'll try to explain as best as I can. I have an alternator which I assume has a 3 phase wye configuration. I am planning on removing the rectifier. I would like the alternator to supply power when it is...
  19. xThornx

    Stepper Motor Design Parameters

    Hello, I'm trying to redesign the electronics for a camera's stepper motor controlled pan/tilt/zoom/focus features. The product is from China and there is no documentation available. I've managed to determine what parts were originally used to control the motors but there are no datasheets...
  20. pirlem

    Solar-powered mirror ball

    Hello dear Forum, I am new here. I don't have much knowledge of solar panels or motors... I was wondering how it would be possible to connect a small/medium solar panel (not too expensive) to a mirror ball motor (for a 50cm diameter disco ball). I don't have any of the materials yet, that's why...