Jump to content
Light-O-Rama Forums

R Weiland

Members
  • Content count

    218
  • Joined

  • Last visited

Community Reputation

1 Neutral

About R Weiland

  • Rank
    Member
  • Birthday June 14

Profile Information

  • Gender
    Male
  • Location
    Silverdale, WA
  • Occupation
    Electrical Engineer (Retired)

More About Me

  • Interests
    Glass Fusing, Flame Working, Golf
  • How I learned about Light-O-Rama -
    Internet
  • Favorite Decorating Holiday?
    Halloween

LOR Software

  • LOR Software Version
    4.3.18
  • License Level
    Pro

Recent Profile Visitors

144 profile views
  1. You definitely want to make sure you are not overdriving the audio into the transmitter. The FM25B has line level in and out connectors, and it is possible to over drive the transmitter and still have undistorted signal on the line output to your stereo. One way to check if its being over driven versus a weak signal is to us a portable receiver, like your car radio and listen in the driveway in front of the garage, if it sounds ok then its not being overdriven,if distorted adjust the level until it clears then move the car away until it distorts due to a weak signal, hopefully you have enough range. I have the FM 30B which has the same output power as the FM25B I use a 5/8 wavelength vertical and my range limit before distortion from a weak signal is about a mile. Using the telescopic antenna that came with the transmitter I was lucky to get 300 feet. Doug
  2. More triac issues

    It would be interesting to compare the location clustering you mention with the historical NOAA National Lightning Strike Map. Certain areas of the country have very high frequency of lightning strikes compared to other parts. A lightning strike miles away can is some situations induce high voltages and currents in the Christmas light strings and extension cords and easily fry a TRIAC, Natures EMP. At my location outside Seattle Wa we are on the low end of the lightning strike frequency. I have seven controllers that I have been operating for over 6 years without a single TRIAC failure or GFCI trip even in our wet weather. Now, with that said we will see how this year goes .
  3. This is what I meant be Non-linear. In an AC circuit, Linear means that the application of a sinusoidal voltage results in a sinusoidal current. As the instantaneous voltage changes over the period of the sine wave, the instantaneous current rises and falls in proportion to the voltage so that the waveform of the current is also a sine wave. A rectifier circuit with a capacitor filter is very non-linear. The capacitor is selected so that it remains charged to nearly the peak value of the AC input voltage. When the load is applied, the capacitor discharges. The current is not proportional to the voltage but behaves non-linearly. The problem does appear to be a capacitance issue and a snubber will "rectify" the problem. Pun intended.
  4. Very interesting. I expected the capacitance of the wiring to be insignificant. Since I haven't dissected an LED string is there a capacitor integral to the LED string as part of the power circuit? I know LED lighting bulbs have a capacitor as part of their power supply, just wondering. Great work !!
  5. As I replied to klb: Remember the LED is a non-resistive load, In fact it is a non-linear load that distorts the current waveform, this combined with the low current causes the issues. The more LEDs you hang on a TRIAC the more distorted the waveform and hence the triggering. Adding a snubber improves the situation by damping some of the waveform distortion.
  6. Remember the LED is a non-resistive load, In fact it is a non-linear load that distorts the current waveform, this combined with the low current causes the issues. The more LEDs you hang on a TRIAC the more distorted the waveform and hence the triggering. Adding a snubber improves the situation by damping some of the waveform distortion.
  7. It's not from "Charge" or "Capacitance" of the wires. The TRIACs in the LOR boxes were designed for incandescent bulbs rated to operate at higher power levels. When an LED string is attached, the non-resistive, and low power nature of the LEDs can cause the TRIAC to misfire resulting in flickering, reduced brightness and limited dimming range. The TRIAC misfires because it does not have the required latching and holding current needed to keep it from misfiring. The way to solve the problem is to install a snubber resistance sufficient to provide the necessary current to keep the TRIAC from misfiring. This can be a C7/9 bulb or a resistor as Ken suggested. Bottom line is you want enough current to keep the TRIAC operating within spec.
  8. LOR USB485 Adapter FTDI Chip Sets?

    The chipset used in my LOR USB485 is the FT232RL chipset. Hope this helps!
  9. Power questions

    Not sure where you got your information that your configuration was"ok" Max-Paul is correct, there are no 30 Amp NEMA recepticles made to accecpt a standard 120Vac plug that would be a NEMA 1-15P (two wire plug) or NEMA 5-15P (Three wire plug). Appears to be a code issue.
  10. Broken CAT5 ports

    Ditto; I had the same problem, used a dental pick to release the pins. It appears that what happened in my case is while I was trying to release the connector from the jack I put too much side pressure on the jack, trying to depress the release tab under the connector boot, and it deformed the jack enough to cause the pins to become hung-up in their guides and not spring back,.but with a little help from a dental pick they sprung back.
  11. Well if you are using the same bubble wrap in your "outside, problem controller" you might solve your problems by removing the bubble wrap it and secure the board with some bolts. You are asking for trouble if you let the bubble wrap contact the traces of the circuit board.
  12. DLTSLC; that pink bubble wrap you are using appears to me to be anti- static wrap and is conductive, it is not an insulator. Granted it is not a low resistance but enough to cause problems. I would not let it come in contact with the board traces.
  13. Splitting cat 5

    Plasmadrive; I think you captured and refined the point that Troy was trying to make. However, Max-Paul brings up a valid point regarding the vast number of non technical LOR users who will be even more confused! And to All: Just because you can, doesn't mean you should.
  14. Electrical question - amperage

    plasmadrive; I have a KILL A WATT model P4400 and it measures True RMS and from the P3 Website all the Kill A WATT models are true RMS measuring devices so the non-symetrical waveform is not an issue. My guess is it has more to do with the tolerances of the components used in the LED strings. The manufacturer had to select a value for the amperage and chose a nominal value based on componet tolerances.
  15. Electrical Help

    Sorry to hear about your DMX controller and LOR adapter. A GFCI monitors the current difference between the Hot and Neutral wires on the circuit it protects, the ground is not monitored. The fact that you have tied one of the low voltage outputs to ground doesnt affect the GFCI. I agree with Max-Paul on the possibility of a filter network between the Hot and Ground internally in your power supplies. Another thing to check is the green power splitter on the end of the extension cord, verify that it is wired correctly!!!!
×