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  1. Sunnysky

    Speed control of single phase induction motor? VFD ???

    This is the best quality available and supports single phase too. http://dl.mitsubishielectric.com/dl/fa/document/manual/inv/ib0600402eng/ib0600402enga.pdf...
  2. Sunnysky

    Speed control of single phase induction motor? VFD ???

    Usually bandsaws have belt pulleys for this reason
  3. Sunnysky

    Repairing tumble dryer: what is this part?

    I am trying to imagine a 50yr old female climbing inside the dryer to replace the OTP switch in the customer review http://shop.zanussi.co.uk/product/1258406014/Tumble+Dryer+Thermostat ;) I guess some units may have been 2 phase or twice the voltage so they had the option for DPDT break...
  4. Sunnysky

    Supply for 30 LEDs

    Agreed but, Since they are all parallel 3.1V*20mA =620mA is ideal if constant , but battery is not constant and also 2X Vf so efficiency loss is 50%. Better to use 16850 3.6V LiPo and have spares then use Ohm's Law on R. e.g (3.6-3.1)V/0.62A= 1Ω. losing 620mW of power so 2W or 5W for cooler...
  5. Sunnysky

    Temperature 'sender' (sensor) Custom Replacement?

    charge target temp to 50 or 85 B is the log_e slope of R at two temps. hence B25/85 I suggest you calibrate it with a pot first
  6. Sunnysky

    Supply for 30 LEDs

    if battery is 6.5V X 5 Ah. it can supply 32.5 Wh in theory each 5mm LED can consume 75mW max. thus 30x. = 2.25W thus 15 h. But without a DC-DC converter, it won't work if all the LEDs are in two parallel banks of 15 as each LED draws3-3.2V @20mA typ. so two In series is 6-6.4 V so there is...
  7. Sunnysky

    Supply for 30 LEDs

    how are the LEDs connected inside?
  8. Sunnysky

    Temperature 'sender' (sensor) Custom Replacement?

    B is the slope at two temps so a part with B25/50 does not have the same value as B25/85 So yes if calculator allows a value for T and 25'C, it works. But ensure application does not exceed sensor current rating for self heating reasons and the installation is not some thick thermal insulator...
  9. Sunnysky

    Noob needs help with batteries

    Your question implies the load current drains more than the charger supplies, which means the battery is not getting charged, rather it is getting discharged and the charger and battery combined cannot supply the current needed by that "load" Think of the battery as large capacitor for charge...
  10. Sunnysky

    Low voltage cutout help

    I've lost track on your complete schematic. redo for better assistance and include relay coil R value and rated voltage. Would 3.3k across coil turn it off? 1k?
  11. Sunnysky

    Home Project wiring help

    battery is from Red+ Black - (gnd)
  12. Sunnysky

    Motor Direction Do Over

    seems like a lot of blogs lately on reversal controllers Ok your remote is A toggle ON OFF and B toggle ON OFF and if A and B are both ON or both OFF, it stops, but both ON stops faster So I have it right? This is the safest to have momentary stop before changing direction. (to prevent twice...
  13. Sunnysky

    Low voltage cutout help

    Rbe is the across BE Vce is the voltage across CE Collector Emitter ok.?
  14. Sunnysky

    Solar cell charger

    unless you define your phone and intended solar panel, the rest is pointless. the reverse blocking diode protects the PV and battery from drain, which may already exist in the phone. yes clouds will lower input power by solar power diffusion.. forget about implementation details until you...
  15. Sunnysky

    Solar cell charger

    is that the PMT load voltage or open cct Voc? PV is a current souce and phone has a V regulator
  16. Sunnysky

    Home Project wiring help

    It sounds like you have a one way remote DEfine what you have better and what you need better and your budget With a 1 way remote , it requires a toggle SPDT relay from gnd to either wire. Do you want a remote garage door opener. Up-stop-down-stop....repeat? Or a two way remote with...
  17. Sunnysky

    RFID Multi Antenna

    in a short time if you dont understand how to research yet and learn , copy someones example like a phD thesis online
  18. Sunnysky

    Is It A Transformer 220vac-110vac ?

    if it broke once, it can also again. reconsider what I said
  19. Sunnysky

    Switching problems.

    These glitches are due to various delays in each gate or from an asynchronous counter. aka a metastable condition. For clean edges synchronize the output with a delayed clock pulse into a flipflop .... or cheat by putting a cap on the output to slow down rising glitches from passing the...
  20. Sunnysky

    Rheostat

    10A PWM board with pot on amazon? https://www.amazon.com/SainSmart-12V-40V-Adjustable-Motor-Controller/dp/B00TIBECB0/ref=sr_1_1?s=pc&ie=UTF8&qid=1469225725&sr=1-1&keywords=motor+pwm
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