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  1. B

    Time delay for cheap.

    555 one shot modules on Ebay for about $3.00.
  2. B

    Arduino - dual servos

    Arduino site has detailed hardware and software examples to cover servos and all other hardware.
  3. B

    Measuring solar panel installation

    Many of relavent measurements associated with solar are usually included in the inverter.
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    Looking for a meter with diode audio beep.

    Uni-t off Ebay....
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    Arduino - dual servos

    Must remember to power the servos from another common ground source.
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    Ring Doorbell

    I think one would need to know more about what this " doorbell kit" comprises to give an educated answer. 2amps is some bell.
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    Low Coolant Pressure Alarm Project - LM393 - your feedback is appreciated

    When the systems leaks coolant , temperature and pressure increase so your whole idea cannot work. As far as probes are concerned, the resistance will not be zero without coolant but the opposite. There was a cure for the electrolysis action, gererate a type of ac signal to pass to the probes...
  8. B

    Da sander blowing fuses ?

    More likely the motor is shot.
  9. B

    Proper method to disconnect cable lugs

    Assuming you mean spade terminals, some have a locking tab. Others, just gently pry off using a flat blade screwdriver.
  10. B

    Testing mAh of a battery?

    First question would be what type and size of battery packs?
  11. B

    Vintage GE clock radio will not Power on fully

    Do you have the meter on diode test to test the transistors? They need a certain amount of voltage/ current to turn on and give a reading which in most cases, the normal ohm scale will not provide. BTW, that board below looks all burnt up...:eek:
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    Spray to clean corrsion from a PCB?

    CRC...wd40 ...
  13. B

    Hydraulic Lift Desk Drawer

    Depends largely on size but plenty of hobby style dc motor/gearbox units on ebay. These have a fairly high torque to begin with being dc motor but then amplified due to the gearbox. Could be further speed reduced via cogged (synchronous) belt drive and also torque increased once again. Beauty...
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    EA2-12NJ low power relay question

    Further look at the spec sheet does not mention internal diode BUT unless using it with other semiconductors, leave any external diode out, at least during initial setup.
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    EA2-12NJ low power relay question

    Photo is out of focus and does not show much. Perhaps one from a little futher back will help. A-up (ass up.....back-to-front) If that is a diode on the coil it is a-up also by the looks of it. Some of those relays already have an inbuilt diode for flyback voltage protection. Clearer pic will...
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    EA2-12NJ low power relay question

    Coil is polarised ie pin 1 + ....pin 10 - .....orientation has a marker on top of the case showing pins 1 and 10 .... See spec sheet...... Sounds like you have it a-up......
  17. B

    Partly wet circuit board

    The buttons (rubber pads) have a conductive coating which you have probably scrubbed off. Parts of the lcd also have to be handled carefully as well. All parts of the lcd have to be exactly aligned.
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    I have a manual battery charger quit working

    Well, in the instructions they did warn you to only use for charging lead acid batteries.:) Besides that, in the manual they quote this .......... This battery charger is equipped with a self-resetting circuit breaker. This device protects the charger from temporary overloads. In the event of...
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    Solar Light Project, help please

    Followed along the first paragraph but when you went to solar panels I had to wonder where you were going with this. I assume you want to recharge the LED supply battery with solar. Your figures are a bit off I'm afraid as 50mA load will run from an 18Ah battery a lot longer than 4 to 6 hours...
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    Please help

    Set up each wing with an independant "off-centre" hinge so the wing reverts to one state. (closed) Then attach a string through a bellcrank on each wing to the back of her shoes.:) Better I think than a pulse generator, batteries and servos....... :eek:
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