Search results

Search Forums New Posts
  1. kellys_eye

    DC Motor TEST Box

    Fit a voltage limiting device across the LED arrangement (zener) to keep it within spec - say 30V. Page 3 of the datasheet notes that for dissipation of around 2000mW (2W) you need a copper dissipation plane on the leads that equals of exceeds 500mm^2 on a 1oz or 2oz copper plane. The maximum...
  2. kellys_eye

    DC Motor TEST Box

    How does the LED assist in your diagnosis? Does it just 'light up'? What form of heatsink did you fit? The tech sheet specifies an area of copper material (when pcb-mounted) such that the heat dissipation is via the limiter leads, not the case structure.
  3. kellys_eye

    Fm transmitter data pins, what are they for?

    Potentially connects to a stereo audio source via the usual 3.5mm audio plug.
  4. kellys_eye

    Building a car

    First find your motor..... that's probably going to be the most difficult part. Once you find the motor only then can we advise accurately on the controller/interface as the motor specification is key to devices connected to it. Assuming you get a 12V, 24V or 36V motor you could use this speed...
  5. kellys_eye

    Need assistance identifying this component

    Yes, 0.1μF, 100V and known as a 'boxed polyester' type.
  6. kellys_eye

    Building a car

    My apologies for taking your lack of understanding of English into account.... You don't need an Arduino. The standard RC controller system could interface to a variable speed controller by attaching the receive servo to the shaft of the potentiometer that controlled the motor. Of course you...
  7. kellys_eye

    AC load sensing

    Why would a current transformer be expensive? You can make one from a few dozen turns of wire around a ferrite (or even open-air). If the load is genuinely a lamp then you could also use a photodetector to determine its status.
  8. kellys_eye

    Pressure sensor data stream to phone/laptop

    There are GSM-enabled alarm systems that accept a multitude of signal inputs - whilst full-sized alarm systems can cost upwards of $150 you can purchase a limited version of such for only a few $10's like this...
  9. kellys_eye

    Frankenstein's Components.

    As much as I've been trying to, finding old equipment for re-purposing has been a sort of hobby of mine for years. In the current economic climate it's been difficult to get stuff as anyone/everyone now recognises the inherent value of such stuff, even if they themselves can't find an outlet...
  10. kellys_eye

    Building a car

    You'd be better off using a screwdriver and some spanners than an Arduino.
  11. kellys_eye

    Stuck with fixing SZBJ DT9205a multimeter selector mechanism

    They hold the LCD in place.
  12. kellys_eye

    LitepanelsMicro LED On-Camera Light

    The LTQY notification 'decodes' (in an SMD online reference) to the LT1961EMS8E 1.5A step up switching regulator which, with the adjacent inductor/diode may be the answer. http://pdf1.alldatasheet.com/datasheet-pdf/view/260320/LINER/LT1961EMS8E.html That said, the device can withstand a 25V...
  13. kellys_eye

    (1973) Imperial HIFI 2700 stereo decoder and memories

    You could fit a potentiometer and adjust it until the scale pointers match the received frequency then measure the pot value and replace the link with the appropriate resistor to get an accurate scale. Would seem to be a bit of a short cut to NOT get the set working as it should.....
  14. kellys_eye

    (1973) Imperial HIFI 2700 stereo decoder and memories

    Strangely another thread brings up this issue and I pointed out that transformers have temperature ratings (maximums) that START at 105C and go up to 180-200C for normal operation (depends on their classification). 55C is pretty average under these circumstances.
  15. kellys_eye

    tripp-lite pr-60 transformer issue

    Threshold of pain for temperature (human hand) is around 54C. Transformers have classifications for heat production (maximums) that START at 105C and go as high as 180-200C...... If your transformer is rated at around 600W (given your PSU is only rated at an INTERMITTENT PEAK output of 60A...
  16. kellys_eye

    Need assistance identifying this component

    First impressions - 0.1μ, 100V capacitor. Pics will confirm.
  17. kellys_eye

    Display for 3D printer

    The depth of glass between the LCD pixels and the front 'exit plane' will diffuse the UV and you will never get sharp enough resolution to make a 3D print from. A possible solution would be a freznel lens made to match the LCD pixel density - good luck with sourcing that though......
  18. kellys_eye

    LitepanelsMicro LED On-Camera Light

    Show a picture of the device.
  19. kellys_eye

    (1973) Imperial HIFI 2700 stereo decoder and memories

    ...not guesswork - the symptoms described pointed straight to it.
  20. kellys_eye

    Cooling electronic circut ?

    You can purchase small finned heatsinks that glue onto the top of such ICs if heat really is an issue. But as stated - if it was designed properly (or used in an application according to its specification) it wouldn't overheat in the first place.
Top