Recent content by jacque

  1. J

    14m2 occasional resetting

    Th Thanks Hippy I will try this - if it works that is the perfect solution for me!
  2. J

    14m2 occasional resetting

    Hi Hippy, thanks for your thoughts. I haven’t pulled the circuit out yet as i can live with the occasional resetting behaviour but it’s really annoying me all the same. It resets without the cable connected at all - however I believe you are right and it is entering download mode. I suspect it’s...
  3. J

    14m2 occasional resetting

    Ok thanks Alan. Makes it work without ever resetting - otherwise it resets occasionally without the cable connected. I think I will pull it out which is going to take an age… was worth a shot anyhow! Thanks for your help. My guess is either what you think re a bad component joint etc or that the...
  4. J

    14m2 occasional resetting

    Hi Alan, I realise my comment of ‘both ground and serial in connected’ is very ambiguous… what I meant was both ground and serial in connected to my computer through the usb rs232 adapter and that is the only combination that makes it work i.e ser in and ser out connected to computer has no...
  5. J

    14m2 occasional resetting

    Thanks for the reply Alan. The programming circuit is as specified in the manual and the capacitor is there. Are you suggesting to try the 2k2 resistor in place of the 10k?
  6. J

    14m2 occasional resetting

    Hi Picaxers, I’m hoping someone maybe able to offer some suggestions to correct the sporadic resetting of a 14m2. I made this circuit some time ago and have no diagram for it and it is installed in a difficult spot to access. I am aware without a c.d this is a long shot but I have noted the...
  7. J

    Variable power laser

    Hi all, I’ve finally got to this part of my project! Im using a 3 phase motor rectified for powering part of the system so it makes sense to use this as my ‘sensor’ for rpm too. Currently I am using a comparitor lm311 from memory set up as zero crossing. Has anyone tried this with picaxe before...
  8. J

    Variable power laser

    Hi guys, sorry for the slow reply I’ve been away. Really appreciate the information you’ve all given - thanks! I’m going to go though it properly and I’ll probably come back with a couple more questions but it looks like the picaxe may be able to do the job using your suggestions. Cheers Anthony
  9. J

    Variable power laser

    Thanks for the explanation Hippy very much appreciated. I think I can get away with a lot less pulses in reality but I was trying to future proof and get an understanding of the limitations of picaxe. All I need is to determine the speed of a fibre spooling off a reel (encoder attached to reel)...
  10. J

    Variable power laser

    Hi thanks for the feedback. What about if I were to use an external resonator with x2 hardware? Thanks Anthony
  11. J

    Variable power laser

    Hey thanks for taking the time to reply. I have had a look around at encoders and I think a quadrature 1024 ppr would be more than ample for my application. I calculate 27238 pulses per sec output maximum for my application speed. I need to be able to control the laser power depending on the...
  12. J

    Variable power laser

    Hi guys, Been a while since i was last on here. I have a general enquiry which im hoping some of you Picaxe genius can please help me with. I am looking to use a picaxe to drive between a 250mw and 5w laser using the onboard pwm. I guess for the bigger laser's I will need some additional...
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