Search results

Search Forums New Posts
  1. kellys_eye

    industrial heater

    Mitsui make a lot of things. What model is it? Is it faulty? What do you want to know? Have you read the manual or spoken to the suppliers?
  2. kellys_eye

    audio output transformer specs meaning?

    Accents... yes. I see the problem there but no amount of bandwidth will improve the intelligibility of some accents. I'm an Englishman living in Scotland - I know all about problems with accents! I find greater issue with people who use microphones by pressing them right up against their face...
  3. kellys_eye

    industrial heater

    Make? Model? If you don't know what it is or what it does, why did you buy it?
  4. kellys_eye

    basic

    That's a tall order! There is a 'method' to fault-finding but you have to have understanding of components and the way they work as well as a basic understanding of the circuit you're working on. If you can't read a circuit schematic then you're already behind the curve and got a long way to...
  5. kellys_eye

    How to reconnect this tiny cable?

    Those connectors are usually made by CRIMPING the wire to the pin. The pin itself is held in the holder by a small (VERY small) 'tang' that, if located and pressed, will allow the pin to slide out of the holder - at which point you 'may' have a chance to solder the wire to it.
  6. kellys_eye

    eprom studys...

    You can get serial EPROMs and byte-wise EPROMs. What's the type number of the unit you;re looking at?
  7. kellys_eye

    LDR Controlled Servo

    A simple 7805 regulator will drop 9V to 5V quite happily using a very common and easily obtainable part. Consider using the LDR as part of a PWM circuit (using a 555 timer) such that varying light levels will adjust the position of the servo.
  8. kellys_eye

    audio output transformer specs meaning?

    I see where you're coming from regarding intelligibility but most speech has context in that failure to understand the overall meaning (when talking over a restricted bandwidth path) is rare - however the phonetic alphabet was created to cover those incidents where clarification was necessary...
  9. kellys_eye

    I Want To Make A Device That Tells Me That Electricity Is Back

    From what I hear in the media you may as well make arrangements for zero power permanently!
  10. kellys_eye

    Power Supply Transformer Markings

    Post pics please. It's never wise to assume anything about transformers like this - it's always prudent to make measurements to clarify things. With only four connections we might assume a single winding for both the primary and secondary so you can do a simple continuity check to determine...
  11. kellys_eye

    How to reconnect this tiny cable?

    With all due respect, isn't that a bit over-the-top for such a situation? Maybe if the OP was wiring up a satellite for earth orbit or for decades in deep space I'd concede the point but for everyday simple repairs it amounts to (almost) scaremongering!???
  12. kellys_eye

    Help, trying to replace a transistor!

    Hold the radio close to another radio operating on the same band. By varying the tuning of one of them you will hear a 'whistle' (called heterodyning) that will indicate the local oscillator is working correctly. If you CAN'T get this whistle then the transistor closest to the RED tuning coil...
  13. kellys_eye

    Tank water level sensor.

    You can, of course, purchase tank level sensors dedicated to the task, many of which are used in the marine (yachting) industry to meter domestic water tank levels. Those operate using a float and arm assembly that rotates a variable resistor and provides a variable DC voltage for direct meter...
  14. kellys_eye

    audio output transformer specs meaning?

    ?? If you check out the speech spectrum for a 'normal adult' the 'hf' end falls off rapidly over around 2kHz and is down by -50dB over 4khz. This is why the standard audio bandwidth of 300-3000Hz (more commonly 3400Hz) is used for many audio and radio frequency systems and considered adequate to...
  15. kellys_eye

    Tank water level sensor.

    A float switch is the most common method of detecting water/no water. If it's quantity then you could measure the pressure at the bottom of the tank. Ultrasonic measurement works but that means having the sensor in a moist atmosphere and the associated problems with corrosion etc.
  16. kellys_eye

    Building an electronic foil surf board

    That motor is some 4" x 2" in size...... I think you've mistaken the 500KV rating for something other than what it is. The 500KV figure indicates that the motor will rotate 500rpm for every volt applied (as good as). Some of the figures given for their operation are also misleading to those...
  17. kellys_eye

    How to reconnect this tiny cable?

    A 60W iron is rather on the large side however it will work. Try applying the iron to the very end of the wire - touch only the exposed wire and not the plastic. You may find that the insulation shrinks back enough to expose enough of the wire core to apply solder and remake the joint...
  18. kellys_eye

    4th July

    No surprises to hear that the media work to their own agenda..... or 'someone's' agenda. Whatever happened to just 'reporting the truth'? <sigh>
  19. kellys_eye

    Equalizier Project

    A cross over is a simple LC filter used to separate the hi-mid-low audio signals to direct to the appropriate speaker. Given the filter has to handle full audio power levels it is a substantial construction (or can be!)
  20. kellys_eye

    Building an electronic foil surf board

    A 2kWhr battery :eek: Must be one heck of a motor! Puts the 150W motor to shame!!!
Top