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  1. ve7brz

    Extending IR Signal

    Sorry, I missed the obvious! Flying the helicopter itself is a full time job. I assume a second operator will be controlling the camera. I would suggest cannibilizing a 'toy' electric ARF for the two channel transmitter, receiver and servos. Otherwise a simple three channel transmitter and...
  2. ve7brz

    Extending IR Signal

    I agree with IRstuff (as usual). Stick with your 72 Mhz RF system, even if it means going to a 7 or 8 channel system.
  3. ve7brz

    Spelling "Misteaks"

    Hi Don01. There are times when I too wish for the good old days of CPM and the flexibility we enjoyed with our computers.
  4. ve7brz

    Fried forklift batteries

    I feel the problem is definitely due to overcharging! The MAXIMUM charge rate for lead-acid chemistry is C/4. The MAXIMUM voltage is 2.4 volts per cell, or in this case 43.2 V. When the current drops to C/100 the charger should revert to a trickle charge of 2.3 V per cell. Your problem may...
  5. ve7brz

    Flywheel/Clutch energy loss

    Good one Richard! Bruce
  6. ve7brz

    Spelling "Misteaks"

    I had just turned off a window capture program which was running in the background. I wonder if it was causing problems. I'll try square root again to see what happens now. ã - still doesn't work, although the capture program was was causing problems with ohm.
  7. ve7brz

    Spelling "Misteaks"

    Hey! It works!
  8. ve7brz

    Spelling "Misteaks"

    Here's another stinker: ohm. Try it in ASCII (234) and you get Û. Try it in Unicode (ohm) gets: Ω, DOS: Greek (Omega) gets Ω and Windows: Greek (Omega) gets Ω. The last three all show properly in the preview.
  9. ve7brz

    Spelling "Misteaks"

    Oops (pardon my poor english). Although the 'root' symbol came up properly on my computer, it obviously didn't make it through the system. My apologies busbar. Next time I'll preview the post before submitting it. We may be stuck with x^½.
  10. ve7brz

    Flywheel/Clutch energy loss

    I can't answer your question regarding the calculation of losses due to heating, but you'll find an efficient mechanism mentioned in this thread: 404-35775.
  11. ve7brz

    Spelling "Misteaks"

    Hi Busbar, Try ã from either the Unicode or DOS: US character sets in the character map. To save scanning through all the symbols you can simply ask for a search, in this case "square root".
  12. ve7brz

    Spelling "Misteaks"

    I'm finding this thread very interesting and entertaining as a pedant who insists on the proper English spelling of words such as 'colour'. Celsius is the 'new' SI replacement for Centigrade. The way I get things like 'º', 'µ', '½' and others into my posts is to use the Windows character map...
  13. ve7brz

    Rectangular tank drainage time

    I don't have a specific answer for this, but I would intergate the formula you are using in small increments from a full to an empty tank.
  14. ve7brz

    Coreless motor

    From what I have garnered regarding coreless motors, wind them as you would a cored motor. The only difference is the absence of ferrite material in the armature. Because of the absence of the reluctance we see in an iron armature the coreless motor is more efficient but invites much higher...
  15. ve7brz

    Signals: 4-20mA or 0-10VDC ???

    4 to 20 mA has it hands down when it comes to noise immunity and/or long line lengths. You can't go wrong using it.
  16. ve7brz

    Advice on a wheelchair control design

    On the basis of operating either of two buttons with one's head, I would be inclined to go with a code system similar to morse code. Instead of dots and dashes we use right switch / left switch. I'll do my best to describe what I envision. The concept involves putting the switch operations...
  17. ve7brz

    Battery charging

    Fawlty is correct; you can provide a 'maintenance' charge of 27 to 27.5 VDC indefinitely without any harm to the batteries. If your power supply is regulated at 24 volts it will not keep your batteries 'topped up'. You may be able to adjust it up to the voltage required if other equipment...
  18. ve7brz

    Positioning a rotating basket precisely to the same position each time

    Now it becomes clearer. The 'lid' is actually an insert with outward protruding 'dogs' which latch into slots in the side of the basket. One would assume that there are stops to keep the lid from dropping too far into the basket. Several questions arise. How do you align the dogs with the...
  19. ve7brz

    Gray Code Encoders

    I'm not sure why you want Gray code as it seems to have gone the way of the Dodo bird. Digital micrometers are readily available which will meet your specification. For the angular displacement you'll have to use rotary encoder (geared up to get your resolution) or convert the angular...
  20. ve7brz

    MIC

    Hi max232, Your query is difficult to understand, but I'll translate as much of it as I can for others: "I'm very interested in digital communication. I wish to design a system to transmit voice (300 - 3400 Hz) digitally via a twisted pair (read telephone or equivalent). I want...

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