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  1. Fish4Fun

    MOSFET Power module and gate drive connections guidance

    @Delta Prime & acoustic power transfer .... Had not even considered acoustic power transfer ... I assume you would be attempting to transfer power in the form of heat? Though I suppose a speaker and a microphone would constitute a real-world example of how acoustic waves could be used to...
  2. Fish4Fun

    IRFP4332 250V Mosfet Rise & Fall Times

    @crutschow ... here is a current schematic of the project ... honestly I had just been working from a scrap of paper, but I have made enough stupid little mistakes already that I went ahead and did a proper schematic ... The primary difference between the schematic and my current prototype is...
  3. Fish4Fun

    MOSFET Power module and gate drive connections guidance

    Hi mumartahir! The EV1909-TL-00A Board specifies bootstrap voltages up to 50V, to drive this module you will need a bootstrap voltage of Vdd + 15V, in your case 115V to 615V ... As stated previously, there is nothing useful to be gained by connecting these two devices. A quick Digikey Search...
  4. Fish4Fun

    IRFP4332 250V Mosfet Rise & Fall Times

    WoW, Great responses! I am using a TC4420 Low Side Driver (pdf attached) specs state up to 6A Drive Current, Tr & Tf ~ 35nS ... But in a quick prototype using a current limited 30V Drain to Source Voltage, the TC4420 got quite warm, and a scope trace on the IRFP4332 drain showed garbage while...
  5. Fish4Fun

    MOSFET Power module and gate drive connections guidance

    Hi mumartahir! Welcome to the forum! I think you might be better off explaining what you are trying to achieve ... the mosfet module you linked is rated at 1200V/75A = 90kW, over twice the power available from a typical residential mains (220Vac x 200A ~ 44kW). The "Control Module" you linked...
  6. Fish4Fun

    IRFP4332 250V Mosfet Rise & Fall Times

    I have some IRFP4332 mosfets, and I think they might be suitable for a one-off 90Vdc motor speed controller project, but none of the datasheets I can find specify td on/off or the tr/toff other than to say, The most recent datasheet I can find was published by International Rectifier in 2009...
  7. Fish4Fun

    About AT29C010A help please

    Hey LoLa, Welcome to EP! The "clear dot" with 40 traces coming out of it is almost certainly some kind of embedded processor or PGA (Programable Gate Array) but without instructions, protocols or clues on how to interface with it, there is not much hope of gleaning anything useful from the...
  8. Fish4Fun

    Air conditioner remote control

    @jcage I think a bit more info on your goal(s) might help clarify a few things ... You state that you want to be able to turn your HVAC unit on/off remotely and that it will be in the "previous state" (ie Heat/Cool) when you turn it back on using the remote ... The obvious question we have...
  9. Fish4Fun

    DS18B20 AVR Math Trick

    I am not certain how the C libraries handle converting C to F ... hopefully not by using floating point libraries ... but here is a quick trick to get 1 decimal precision for a display with very little math routine overhead ... The Math: ((20.5C * 9)/5) + 32 = 68.9F or (20.5C * 1.8) + 32 =...
  10. Fish4Fun

    PCB - Manufacturing and Assembly Prototype x 5

    Hey stephan06! I realize this thread is now 2 months old but ... The problem with "prototypes" and "one-offs" is they are expensive both to the consumer and to the PCB MFG. Many PCB houses that do prototypes do them so they can ultimately get production quantity orders ... a few actually...
  11. Fish4Fun

    ATMEGA2560 .ORG Directives for ELPM and other Extended Pgm Memory Instructions

    I thought I would share this because I pulled out more than a little hair figuring it out ... Please NOTE: This concerns AVR Assembler Instructions, No Idea how it is handled in C. I am working on an Assembler program for the AT2560 that has several large tables, the code itself fits in...
  12. Fish4Fun

    PWM shielding

    @Aniketbarapatre26, Welcome to Electronics Point! PWM (Pulse Width Modulation) is generally a reference to a type of "output" while "signals" is generally a reference to some type of communication protocol. A PWM output is generally a "conceptual equivalent" to a rheostat ... ie a PWM output...
  13. Fish4Fun

    Logic Gate Sanity Check

    Thanks Harald! I was trying too hard to make a single ATTINY2313 read 4 x DS18S20 Digital Thermometers and Display the output on 4 x 4-Digit 7-Segment LED displays (Total of 16 7-Segment Digits) ... AND log the data to an external storage device ... While I am confident I could eventually get...
  14. Fish4Fun

    Logic Gate Sanity Check

    Thanks Harold! That's EXACTLY what I needed ... I knew I was making it more difficult than I needed to .... I am an idiot. I am already using a pair of 4052's on the PCB .... Thinking on it, I can connect the PWM output to the "inh" pin on the 4052's and this will eliminate needing to combine...
  15. Fish4Fun

    Schematic to pcb layout, or Gerber

    bigkim100 ... You are probably best off having the boards made by a PCB prototype MFG. If you aren't in a hurry, China offers very reasonable prototype quantity boards but expect 4-8 week lead times ... If you are in a hurry (you probably don't have time to make your first PCB) and you should...
  16. Fish4Fun

    Need Help in which is correct way to connect load to controller outputs

    chinna723 ... You are going to need to give a bit more information before anyone will be able to help you. I would suggest you provide links to both the "controller" and the "Solenoid Valve" and then give some context to where "LSD" and "SV Ground" are mentioned .... The terms "LSD" & "SV...
  17. Fish4Fun

    Logic Gate Sanity Check

    I am trying to use a single uC i/o Pin To toggle a PWM output between two mosfets ... Easily done with 5 NAND gates, but I would like to achieve it with a single 74xxxx IC and the logic is killing me ;-) Here is the Logic I need: ; A | B | Out1 | Out2 | ;---|---|------|------| ; 1 | 1 | 1 |...
  18. Fish4Fun

    Two Wire Serial bit-bang Dyslexia

    Thanks Harald! I truly appreciate you taking the time to detail this for me. I cannot begin to explain how frustrating it is to look @ "dab" and read "bad", or "21" and see "12". While I understand MSB/LSB first conceptually, translating that to a time line with no actual data was killing me...
  19. Fish4Fun

    Two Wire Serial bit-bang Dyslexia

    My Dyslexia is killing me and I need some help .... I can't remember the relationship between time and left-right orientation in the timing diagram ... I know this seems ridiculous, but it is the world I live in. In an effort to make clear what I am asking here are the two most likely scenarios...
  20. Fish4Fun

    Creating a user interface for arduino.

    @ HellasTechn ... You should seriously consider incorporating some means of switch de-bouncing as suggested by Harold & Heavens ... Slowing micro-controller interfaces down to "realistic human speeds" is extremely important for reliable functionality. Watching a typical "tactile switch" output...
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