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  1. Fish4Fun

    Looking for 60A 60V mosfet

    @asaf123098 OK, you can stop your search for a mosfet/transistor. You will all most certainly be better off using a simple mechanical switch to interrupt the signal source to the speed controller. If you will simply post a link to the ESC (Electronic Speed Controller) you are using (and...
  2. Fish4Fun

    Looking for 60A 60V mosfet

    @asaf123098 Actually, thinking about the parameters you have given, I have to ask ... Are you attempting to control the motor (presumably a permanent magnet motor with a conventional armature) with your circuit ?? Or Are you simply wanting to turn the power on/off to an existing DC motor...
  3. Fish4Fun

    Looking for 60A 60V mosfet

    @ bertus & Alec_t Yes, there are several refinements I would make to the posted schematic(s) prior to implementation ... not the least of which would be some type of **speed regulation** ... 60V @ 60A = 3.6kW .... on a "skateboard" no less ... but I thought it prudent to test if the OP was at...
  4. Fish4Fun

    Looking for 60A 60V mosfet

    asaf123098, It is probably a bad time to ask, but are you trying to switch: 1) The High Side 2) The Low Side Assuming you are using an N-Channel mosfet to switch the Low Side (as you probably should be), the basic schematic will look like this: With an N-Channel Mosfet the control signal =...
  5. Fish4Fun

    Low Power Embedded DC supply from 120Vac Mains

    Hey Harald! Thanks! Those are way nicer than the ones I ordered. I actually saw some modules similar to that, and agree 100% fully enclosed offers safety advantages. The particular project I ordered these for is cost sensitive (for absolutely NO good reason), and I plan to build at least half...
  6. Fish4Fun

    Low Power Embedded DC supply from 120Vac Mains

    For years, a recurring theme in my DIY projects has been a "cheap" DC supply from AC Mains .... and to that end Wall-Warts have generally been the answer ... But sometimes a Wall-Wart simply isn't a good answer .... Over the years I have spent many, MANY hours conjuring up cost effective DIY...
  7. Fish4Fun

    help wiring 3 phase washing machine motor

    @Minder Thanks for proving one more time that things I was told casually in the previous Millennium by people with dubious credentials are not immutable fact, and that Google truly is a resource with more accurate and salient information: There are many detailed examples, schematics and white...
  8. Fish4Fun

    help wiring 3 phase washing machine motor

    @Hbaker7729 .... At the risk of continuing the hi-jacking of this thread ... I am interested in investigating a DIY driver for these 3-phase motors ... the first big **IF** is: IF they are truly capable of operation beyond +/- 10% of name-plate RPM ... I suspect they might NOT be. The motor...
  9. Fish4Fun

    Smart Ventilation system Wireless Environment Sensor and Exhaust Fans

    mando87, There are numerous ways to control power, and each method has advantages and disadvantages. Wireless sensors are NOT necessarily based on IP protocols or even on RF signals (ie IR TV remotes). Temperature based sensors include both mechanical and electronic types that might or might...
  10. Fish4Fun

    Modelling of AC Servomotor

    Hi abdulwali, welcome to EP! It might help to give some context to your inquiry. The paper you attached appears to me to be a formal scientific research paper essentially pitching "synchronous control" vs "sensor control" in cases where a driver is specifically designed for a particular...
  11. Fish4Fun

    Simple Water Fill Circuit with Buffered On/Off

    Nothing complicated here, just a simple circuit to turn a liquid fill solenoid on/off depending on liquid level with an adjustable amount of buffering to minimize pump cycling .... While virtually any standard float switches will work, the current/voltage/power capabilities required are...
  12. Fish4Fun

    Measure distance to water surface

    Hey WWild! I have wrestled this problem many times over the years .... with varying degrees of success. One method that works fairly well for a simple cistern type scenario is a pair of "Flow Meters" one for water in and one for water out with a simple "Float Switch" to prevent over filling...
  13. Fish4Fun

    Suggestion to send wireless Temperature sensor data to google spreadsheets

    Hey natpal83! Hrmmm, you seem to be missing a part ... The wireless sensor you linked transmits a temperature reading much like a radio station transmits a song ... Without a receiver you have no way of knowing what the temperature is ( or knowing what song is playing ). Typically industrial...
  14. Fish4Fun

    PCB, Toner transfer method

    Hey Y2KEDDIE ! IMHO Toner Transfer is a PITA ... many, many people have managed to get decent results using this method .... the common denominator appears to be meticulous attention to detail following a relatively lengthy trial and error period. Perhaps the biggest problem is the large...
  15. Fish4Fun

    AVR-ASM Set/Clear Bit Routines

    Toggling bits is pretty straight forward with an 8-bit AVR with a priori knowledge of the the particular bit to be toggled, especially if the bit to be toggled is in the address range of $20 to $3F (Registers $00 to $1F) ... sbi PORTA, 0 ; 1 Set PORTA.0 cbi PORTA, 1 ; 1...
  16. Fish4Fun

    PT4115E LED Driver Efficency

    I KNOW everyone has been sitting around on pins and needles waiting for me to post my findings ... LoL !! The **actual answer** is really a collection of things that add up to more than one might think ... A primary culprit was the late bound addition of a diode to the voltage input (to...
  17. Fish4Fun

    PT4115E LED Driver Efficency

    Hey Adam! Thanks! Gonna cut another PCB and populate it :-( The **problem** is that I did the testing of the original circuit ~ 3 years ago and I don't have any notes on the actual test results of the efficiency ... I know I tested it, and I know I told the guy the circuit is for that the...
  18. Fish4Fun

    PT4115E LED Driver Efficency

    Hey Adam! The input current is measured using the DRO on my CC/CV Bench supply .... Power = Current * Voltage As mentioned above, the current output to the LED array is not measured directly, rather the Forward Voltage of the Array is measured when the PT4115e is powering it, and then I power...
  19. Fish4Fun

    PT4115E LED Driver Efficency

    Hey Adam! Data Sheet: https://people.xiph.org/~xiphmont/thinkpad/PT4115E.pdf Thanks for looking! Fish
  20. Fish4Fun

    PT4115E LED Driver Efficency

    I am using a pair of PT4115E Drivers (Data Sheet: https://people.xiph.org/~xiphmont/thinkpad/PT4115E.pdf ) to drive two different arrays of LEDs.... The circuit is identical to the "Typical Application Circuit" with the addition of a 10uF Capacitor across the LED arrays ( to reduce ripple, as...
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