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  1. Arouse1973

    EL Panel/Sheet Manipulation

    I once was asked to design a sound and light garden for partially sighted and deaf people at a local school. We were looking at using EL sheets, I don't think you can join them like that. You get splitter cables from the inverter which will run more than one panel. You can get panels which are...
  2. Arouse1973

    Phase voltage circuit help

    I hope this is what you mean Kris. You can see a 3 Volt and 1 Volt sine wave going in and a 2 Volt sine wave out. The output is the difference between the two. MyFunction1 is the output of the transformer. Adam
  3. Arouse1973

    Taking some time off

    Have a good break and merry Christmas to you and your family. Adam
  4. Arouse1973

    Signal -> System = Oscillator

    Do you think you could do this with some simple logic?
  5. Arouse1973

    Giday from Perth, Western Australia!

    Hello Daniel. Adam
  6. Arouse1973

    Designing a Time Delayed Relay

    I am assuming maybe incorrectly that what ever plug is used has a fuse? It is this fuse that need to be correctly rated. Fuses are for safety in the event of a failure of the equipment. I wouldn't use a track as a fuse because I wouldn't want to repair my PCB if a failure occurred. At the end of...
  7. Arouse1973

    Designing a Time Delayed Relay

    Just gave an example to Kris. It's all about the faults. Which are what fuse are for in this instance. Adam
  8. Arouse1973

    Designing a Time Delayed Relay

    I was thinking more fault currents rather than operational current. So if we had 2oz finished weight and calculated it with the largest fuse someone could fit which could be a 13 Amp fuse (UK) even though we know this is way higher than we will actually use it could never the less happen my...
  9. Arouse1973

    Designing a Time Delayed Relay

    There are lots of options that you can have from the PCB manufacture. Unless you selected other than their standard then I think your going to get 2oz finished copper weight. So that's 1oz base copper and 1oz plate. You need to check with the manufacturers specifications. Who are you using? I'll...
  10. Arouse1973

    Designing a Time Delayed Relay

    Hi John Using 70um copper (2oz) with no plating I get 2.7 Amps will blow the trace in 5 seconds. So if you had a 3 Amp fuse fitted and a fault developed that drew just under 3 Amps as an example the fuse wouldn't blow but your track would. This uses Onderdonk's equation. Is your base copper...
  11. Arouse1973

    Designing a Time Delayed Relay

    Hey John My concern is the power traces to and from the transformer, they might be fine they just look a bit thin. You dont want them going pop before the fuse. I guess they are 0.3mm. What current are you expecting the circiut to use? Let me know and I'll work out the fusing current and temp...
  12. Arouse1973

    Dishwasher PCB resistor burned out

    Oh dear looks like its been to one of Dave's barbie's :) Do you have anything left of the component? Adam
  13. Arouse1973

    Designing a Time Delayed Relay

    John this looks good, some of the traces I would beef up a bit but thats only my preferance. You have designed this PCB with what I consider advanced PCB layout techniques. Your use of islands is a very good idea this reduces resistances but can cause issues with hand soldering. I realy hope...
  14. Arouse1973

    Cooling alternatives for a TEG

    It was an extruded type we used to use at work but I cant remember the spec. It was 10 years ago, sorry. But it shouldnt be too much to workout what you need. Adam
  15. Arouse1973

    Designing a Time Delayed Relay

    Yes I agree. Adam
  16. Arouse1973

    Hello All!

    Hello Ray, hope you find this site interesting and that we can help. You might even teach us something? you never know :) Adam
  17. Arouse1973

    Cooling alternatives for a TEG

    What I have done in the passed is use two large heat-sinks and sandwich the element between the two with some insulating thermal sheet and then bolt the two heat-sinks together . Heat one side of the heat-sinks only. You could use a fan on the other heat-sink to improve this even further. Thanks...
  18. Arouse1973

    Recording EMF

    EMF sounds, thats a new one on me, what do you mean. I know ELO but not EMF. Adam
  19. Arouse1973

    Will a 12.5V DC power supply damage a 12V device ? See details inside..

    Just put a dode in the power line if your worried. This will give you about 11.9 Volts. Choose a diode that can handle the current. A silicon diode drops about 0.6 Volts, this is dependant on current so check the data sheet. Adam
  20. Arouse1973

    Need Help with auto switching Reverse Polarity Circuit

    Yes your right Hop. I met a rep from a company who was selling silver thread cloth. We bourght some and has a local seamstess make us a small EMC chamber, it fitted on my desk, it was rather cute.It worked well. We were told hospitals use them as hand wipes because they kill bateria. Also the...
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