Search results

Search Forums New Posts
  1. Tha fios agaibh

    Soldering iron trouble.

    You haven't told us what your using it for. But generally, you probably want 30 or 40 watts for medium sized work. Even better, buy an adjustable temp iron. Now if your soldering stained glass windows, forget everything I said.
  2. Tha fios agaibh

    Identify corroded diode?

    I wouldn't minimize the importance of this safety device (even if it's just a beeper) Dork made an excellent point as to the implications of touching this. Sure we could figure it out to fix it, but if anything was to happen, the lawyers will be all over you. No good deed goes unpunished.
  3. Tha fios agaibh

    Identify corroded diode?

    Looks like a zener. If you have a CC power supply you can do this:
  4. Tha fios agaibh

    Strange chemical reaction from PVC grommets

    Martaine, you can call me Master spark jockey. Lol Trevor said "in walls" so I'm thinking paint bleed through was not what he meant. I'll wait for him to explain himself. Besides, On this side of the pond we are not allowed to have unprotected cables on walls. I find cables that are painted do...
  5. Tha fios agaibh

    Soldering iron trouble.

    If your soldering tiny delicate electronics you want lower wattage where too much heat won't destroy the components. Conversely if your soldering a big transformer case to a chassis, you'll need more heat and more wattage to do the job.
  6. Tha fios agaibh

    Strange chemical reaction from PVC grommets

    Can you elaborate? I don't think I've ever seen this and I'm an electrician.
  7. Tha fios agaibh

    Chosing the Right Tweeter

    A poor amplifier design may not be response enough to reproduce the sound accurately and overdrive the voice coil in the speaker. This is one of the things that blows speakers. A better amplifier is more dynamic and has more headroom to handle the frequencies (responsiveness) at higher volumes...
  8. Tha fios agaibh

    Chosing the Right Tweeter

    Great post Gryd3, I'd just like to add: The rating tell the maximum allowable wattage. If it is rated 450w or higher (amp output), you should be fine. I recommend you take a look at crossovers. Especially given the high wattage your dealing with. They are not too expensive and easy to hook...
  9. Tha fios agaibh

    I think I am a Technolic.

    Thank you for sharing Yaqui. You are certainly not alone. The dichotomy of Technology is that it was invented to simplify and make our lives easier. In reality it complicates it when we become enslaved to it. They say it takes 3 weeks for something to become a habit. You could make it a point...
  10. Tha fios agaibh

    I think I am a Technolic.

    I can relate. I postponed buying a smart phone for years to avoid becoming one of those idiots looking down at their phone all the time. The wife's pleading eventually broke me down, and we updated our Smithsonian clamshell phones. Sad to say, I'm now another zomby staring down to that lovely...
  11. Tha fios agaibh

    Chosing the Right Tweeter

    Not a problem having speakers rated more than your amp can deliver. (But it doesn't mean a smaller amp can't blow a larger speaker). You might save some money by getting tweeters with a lower rating. Maybe 500w? But I'd size it at least as large as your drivers rating.
  12. Tha fios agaibh

    Chosing the Right Tweeter

    If your speakers have a crossover, read the specs. It's also a good idea to have a current limiting (fast acting) fuse to protect your system.
  13. Tha fios agaibh

    Gate automation system - Motors open but do not close.

    According to link in post 15, it is a 3 wire 230v AC supply. Another clue that it's AC is that blue varistor between the relays. What I'm wondering is; where is the 3rd wire (black) from the motor?
  14. Tha fios agaibh

    Soldering iron trouble.

    @8bit what kind of iron was this that let you down? It may serve as a warning to others.
  15. Tha fios agaibh

    220v to 110v circuit

    :D Even better, we have 240v.
  16. Tha fios agaibh

    220v to 110v circuit

    Similar to a post not long ago called "thermostat". I believe it was Duke37 who suggested changing the incoming capacitor in order to increase the internal voltage of the circuit.
  17. Tha fios agaibh

    Gate automation system - Motors open but do not close.

    I'd look for a pattern like; open cycle powers 7 but not 9 with respect to 8 (common). Then see if it follows with the other side; power on 10 but not 12 with respect to 11. Make note of which terminal energizes with open/close cycle and which relay energizes. If you have a loaded meter, that'd...
  18. Tha fios agaibh

    Gate automation system - Motors open but do not close.

    Yes got your link, blue (8) and black (7 or 9) is one direction and blue and brown is the other. Its 230v AC. First thing I'd check is the capacitor. The limit switches are internal
  19. Tha fios agaibh

    Gate automation system - Motors open but do not close.

    Depending on motor type, rotation is determined by changing the start winding connections on AC or the DC supply polarity. Take a voltage reading between common (8) and one of the start terms (7,9) make note of direction of motor. In other words, I'm expecting 7 hot and 8 neutral (blue) for one...
  20. Tha fios agaibh

    Gate automation system - Motors open but do not close.

    I don't follow the operation of this. Do both motors operate to open the gate, and then both motors change rotation to close it? What I'd do is remove the cover on the the two relays controlling the motors. Then wearing proper PPE, carefully actuate the relay manually to verify which relay...
Top