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  1. CircularLogic

    RC Series Circuit

    I understand that the use of an RC circuit probably is not the best solution, but I was trying to use parts that I have laying around versus something more elaborate. I usually follow the rule of perfection being attained not by nothing more to add, but nothing more to take away. However, if a...
  2. CircularLogic

    RC Series Circuit

    Ok, here is some more information... Relay: http://relays.tycoelectronics.com/datasheets/KHA_DS.pdf Potter/Brumfield KHAU-17D12-12 12Vdc, 160ohm, 0.9W (no diodes) _____________________________ Addressing IRStuff: Question...Since "holding current" is not listed in the spec. sheet, is it safe...
  3. CircularLogic

    RC Series Circuit

    Now this should be elementary, but I have an operational question regarding a series RC circuit. I have a small 12V Potter/Brumfield relay that I would like to make slow release by about 5 seconds. I figured I could use a simple RC circuit across the coils. I chose a 1Mb resistor and a 5uF...
  4. CircularLogic

    Need to discipate 1A. - Materials Question

    Sorry about not getting back sooner. Had to get on an airplane. Actually, duplication of the physical behavior is absolutely necessary. Testing of the program in the PLC is only part of the process. Simulating real-life characteristics of the bulb outputs is also imperative. The voltage...
  5. CircularLogic

    Need to discipate 1A. - Materials Question

    I will post some pics shortly. ———————————————————————————————— James W. Hudgins, III Union Switch & Signal
  6. CircularLogic

    Need to discipate 1A. - Materials Question

    So the REAL answer to the question is NO. There doesn't appear to be any device that is smaller and produces less heat than what I already have. I will post any new information that I may find elsewhere. Thanks.
  7. CircularLogic

    Need to discipate 1A. - Materials Question

    The LED circuit is part of a simulator that tests the internal programming of the PLC. Under normal conditions the lamp could be lit constantly, but if the PLC detects anything less than an amp +/- 10% it will flag the lamp as defective. The "pulsing" that is does is only done when the lamp is...
  8. CircularLogic

    Need to discipate 1A. - Materials Question

    This is pretty simple actually. I have a PLC that has a "light out" (LO) circuit that checks the filament of an incandescent bulb by intermittently pulsing the output. If there is no current draw, it sets a LO bit in the program. I simulate the LO condition with an LED and a switch. I use a...
  9. CircularLogic

    Anyone work for/with the railroad?

    I am new to the forums and was wondering if there was anyone who did PLC type work for the railroad? ———————————————————————————————— James W. Hudgins, III Southwest Signal Engineering Co. www.swsignal.com

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