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  1. B

    Help with solid state relays

    on-on-on.....twisted wire o_O Requirement seems a bit off to me.:)
  2. B

    Help with solid state relays

    First part of your requirement contradicts the second part.(on-on-on with an on-off-on) changes to off-on-off with an on-off-on. Care to have another try at explaining what you need, would be helpful. If the latter then yes, just use a relay to change the logic.(or a transistor or a...
  3. B

    CD 4047 inverter

    240/6 = 40:1 240/12 = 20:1
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    Novice needs help farting around...

    LED, 3 x AA batteries, push button, buzzer off Ebay..... Buzzer.....http://www.ebay.com.au/itm/2-pc-3-24V-Piezo-Electronic-Tone-Buzzer-Alarm-Continuous-Sound-12V-Mounting-Hole-/310972277596?hash=item486764635c:g:gT4AAOSwHnFVy~yD or this if you want to save running the...
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    LM3!* Again? Not really... but you could help...

    I meant where did you get the circuit from and have you made changes. You quote low capacity 27 ohms...that I afraid means nothing. 0.4A is the transformer output (depending on where you obtained that information) BUT what are you intending to do with it?
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    LM3!* Again? Not really... but you could help...

    Do you have a link to the circuit. What is the capacity of the transformer. What type of battery. What voltage of battery.
  7. B

    Gate automation system - Motors open but do not close.

    Yes, seen motors like that before. Not all that common but the 3 wires you mentioned before threw me, should be 4 with the earth wire really. Limited by what we can see in the pics. Something definetly not switching properly by the looks and more than likely a relay. One might think the motor...
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    Gate automation system - Motors open but do not close.

    Power supply: 120V - 24 Vdc Motor Think I miss read the specs..... one I linked to is apparently 120v mains suppy with a 24V DC motor
  9. B

    Gate automation system - Motors open but do not close.

    Just looked up a web site ....says motor is 120-24 VDC (for that particular operator at least) This would assume just reversing connection would reverse the motor. The 120-24 has me a bit baffled though. In most instances this usually means any voltage between 120 and 24 would work, BUT usually...
  10. B

    Gate automation system - Motors open but do not close.

    Layout = circuit diagram. Is the #11 pic all you can provide of the motor?
  11. B

    Gate automation system - Motors open but do not close.

    Think the best idea would be to get a drawing of the layout at least. Can you provide a pic of the motors?
  12. B

    Electronic thermometer project needed.

    Calibrate at sea level with ice fresh water or boiling fresh water.
  13. B

    Motocycle gear change counter

    Ebay cheapie...should keep you going..... weight might a problem though.o_O http://www.ebay.com.au/itm/New-Universal-Motorcycle-Digital-Gear-Indicator-for-Motorbikes-Green-LED-/321785015991
  14. B

    Gate automation system - Motors open but do not close.

    Seems there are 2 motors, one for each gate half. I believe you were on the right track initially when you swapped over the controls to the opposite motors and the fault followed. On a good day, most problems with electronics stem from the mechanical sections such as relays, switches...
  15. B

    What is it?

    Homework..??
  16. B

    cake water fountain help

    First one will NOT work as it is a DC output. Second one is the same one I answered on in the above #19
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    cake water fountain help

    Yes, that should work but at a cost as it is much more expensive and about 6 times larger than you need. You will have to carefully select the right connections. Primary has a choice of either 380V or 240V input and secondary also has many choices, you need the 36V output. It's a...
  18. B

    fluorescence light Watt meter

    18W is the light output. 70W is the circuit consumption i.e. losses in the ballast + power to light the tube.etc.
  19. B

    Motocycle gear change counter

    As Gryd3 says, if you don't want any switches, track your tacho and speedo pulses and compare then light up your led display with that number.
  20. B

    cake water fountain help

    Wow...overkill How about 2 of these shown below. Connect the 2 primary windings in parallel and the 2 secondary windings in series. You will of course have to check with a multimeter the secondary output as they will have to be the correct sequence...
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