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  1. Fish4Fun

    Capacitive Reactance Circuit

    chopnhack, Yea, if you are in the US then e-packet is the way to go for anything you want in the near future.....typical delivery is ~7 working days from when it is actually mailed....and e-packets come with tracking info....I would say that 5 days is the 'exception' not what you should...
  2. Fish4Fun

    Help with RS485

    Fuzzywombatsup, You should prolly look @ an Arduino....it is easy to interface with a PC via USB and you can power up to ~500mA @ 5V directly from the USB...this should be a gracious plenty for a large number of sensors.....look at the Dallas Semiconductor series of 1-wire serial sensors...they...
  3. Fish4Fun

    Capacitive Reactance Circuit

    Rats, sorry to hear that. There are numerous vendors with whom I have had really good luck with, I wish I had taken the time to select one of their offerings....I only linked that particular one because it came up 'first' in the search window....i didn't really expect anyone to order it....If...
  4. Fish4Fun

    Getting Started with FPGAs.....

    I have been fascinated with FPGAs since I discovered them in a Digikey Catalog back in the 90's.....I even went so far as to order a "dev board" a decade or so ago...(...but I never got around to actually doing anything with it...not even sure where it might be at this point....)....so now I am...
  5. Fish4Fun

    Capacitive Reactance Circuit

    Sooooo....it has been close to a month since the $0.99 LED driver from China race began.....has anyone received their package yet? If I had known everyone was going to rush off and order them I would have taken a bit more time selecting one I have actually ordered//tested...but I assume most of...
  6. Fish4Fun

    Stepper motor control

    Deimantas, I am a pretty serious DIYer, and i am all for building a stepper driver under the right circumstances, but building a stepper driver for a NEMA17 is REALLY re-inventing the wheel....I don't know how long it would take for one of these to get from China to You, but it would likely...
  7. Fish4Fun

    Help with RS485

    FuzzyWombatSoup, Welcome to EP! I think you might be making this A LOT harder than you need to....It would prolly be best if you just went ahead a spelled out exactly what you are trying to do....for instance, the DS18B20 temperature sensors are a popular choice for sensing a fairly large...
  8. Fish4Fun

    The need for resistance

    Dustin, Welcome to EP! Well to quip a quote from the Borg...."Resistance is futile!".... OK, Seriously, resistance is one of three PASSIVE properties associated with electricity, the other two being Capacitance and Inductance....As a component in an electronic circuit resistors might be used...
  9. Fish4Fun

    Stepper motor control

    deimantas, Welcome to EP! I AssUMe you are attempting to use something like Mach3 or EMC to control the parallel port to drive your stepper drivers directly from a PC? Or are you planning to build/write your own controller? If you look @ the specs on a standard LPT port it is easy to...
  10. Fish4Fun

    3-Phase VFD Supply Pre-Filter

    @Heavens1944, Thanks for the kind words! I would strongly encourage you to make the plunge into CNC if you have some "spare time" for a hobby and you have a passion for a challenge with tremendous potential of rewards in satisfaction, DIY CNC is a GREAT choice! Here is a link to my first...
  11. Fish4Fun

    3-Phase VFD Supply Pre-Filter

    @Heavans1944.... Thanks for the reply! Yes, I have read many, many of the horror-stories on various forums....but MOST of those are in the 2008-2010 era...I haven't found many recent posts about "smoking failures....doesn't mean there haven't been any....perhaps Huanyang fixed the issues...
  12. Fish4Fun

    3-Phase VFD Supply Pre-Filter

    Thanks Harald.....my "CNC Buddy" gave me exactly the same advice, LOL! But we have had company @ the house since my Spindle & VFD arrived, I had to work all weekend...blah, blah, blah, and so I have not been able to actually do anything except "create problems" and attempt to solve...
  13. Fish4Fun

    3-Phase VFD Supply Pre-Filter

    Hey Harald, Thanks for the quick response! YES the VFD has a built in rectifier/filter.....designed for 3 phase input, but the manual states it will **work** with a single phase input.....but I am concerned that the filter capacitors in the built-in rectifier circuit are NOT large enough....So...
  14. Fish4Fun

    3-Phase VFD Supply Pre-Filter

    I am finishing up a CNC router build and have opted to use a "stock" 3-phase spindle rather than a DIY spindle. I have received the spindle and the VFD and am wading through the instruction manual and various forum posts about set-up, problems, etc, etc. This is the VFD...
  15. Fish4Fun

    Capacitive Reactance Circuit

    I have ordered many different wattages of these: http://www.ebay.com/itm/New-LED-Power-Driver-3X1W-Light-Lamp-Power-Supply-AC-85-265V-300mA-/360833428930?pt=LH_DefaultDomain_2&hash=item5403592dc2 from various sellers and they are in-fact SMPS CC supplies. Some of them use a tiny controller and...
  16. Fish4Fun

    Simple Short Range FM Transmitter

    Hey Einstein Jr. ! I think you might need to "re-think" simple....RF is really not my forte, but what little I have played with it, I have never found a "simple" answer to reliable DIY FM Rx/Tx starting from the component level....PCB layout, grounding and passive component matching play such...
  17. Fish4Fun

    Capacitive Reactance Circuit

    They are dangerous, lol. If by "fixture" you mean that the device you are working on is actually a "lamp" or "light", then I would think you would want more than 30mW-60mW of LED light...perhaps not....if this is some other device that simply has a small "indicator light" in it to give visual...
  18. Fish4Fun

    testing capacitors

    I would assume "OL" = "Outside Limit", "Over Limit".... or something similar...ie the capacitor being tested is not within the selected range of the meter. Typical capacitance meters have at least two "ranges", much like an ohm meter // voltage meter // current meter....if for example it only...
  19. Fish4Fun

    Finding full load amperage

    Hey Fry! Welcome to EP! Hrmmm, my watch (a $30 Timex digital watch my son gave me ~15 years ago) needs a new battery about every 5 years....I am a bit perplexed by the notion that any watch would be worth the trouble of building any type of charging system for...much less something as...
  20. Fish4Fun

    Capacitive Reactance Circuit

    chopnhack....using a capacitor to limit current through an LED is a mixed bag....but it works....unless you have a source of fairly cheap 250V capacitors just laying around, I am not sure you wouldn't be better off simply using an LED driver designed to be line driven (I am assuming you don't...
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