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  1. camerart

    AK8963 Compass peripheral on 18F4620 intermittent error?

    Hi H, If you check centre of the Schematic you can see the 3x SPI connectors, plus a list of C/S for each of the peripherals, on PORTD. The COMPSS is the C/S for the Compass and the sequence is the READ of the REGISTERS on the Compass in turn (LOOP). Here's the PCB if that makes it clearer. C
  2. camerart

    AK8963 Compass peripheral on 18F4620 intermittent error?

    Hi H, I use Oshonsoft BASIC only. Here is the main snippet: And Schematic although as mentioned there are 3x different PCBs with slightly differing tracks. ---------------------------------------------------------------------- 'READ COMPASS XYZ REGISTER addr = 0x80 '!!!!!!!!!!!!!!!!! compss...
  3. camerart

    AK8963 Compass peripheral on 18F4620 intermittent error?

    Hi, Here's a puzzle! I made some Compass breakout boards for an AK8963C chip. x5 (Iphone5) I have PCBs x3, some with 3x different peripherals, using SPI. 1x PCB with only the Compass, and a simple program on the 18F4620. I've been testing each peripheral on separate programs, till almost...
  4. camerart

    Clarke CCRT266 Speed controller repair

    Hi, Sorry for the delay, I didn't receive a notice of your post. Anyway, I centred the Mosfet, and it ran ok, and has been used for over 6months ok. A couple of weeks ago, the owner gave it back to me, broken again. I changed the Mosfet, no fix, so I checked the motor. The motor has lost a...
  5. camerart

    Clarke CCRT266 Speed controller repair

    Hi H, With the MOSFET in, it only runs at full speed. I took the MOSFET off, and connected an oscilloscope to the GATE, and sure enough, when moving the speed control, the square wave went from almost always off to almost always on. I'll order some MOSFETS, and let you know what happens. C.
  6. camerart

    Clarke CCRT266 Speed controller repair

    Hi H, I tried testing with my meter, but it wasn't clear. Am I correct, that if the MOSFET does have a short from source and drain, then won't the drill run flat out, and I can switch it off with no farther damage? C
  7. camerart

    Clarke CCRT266 Speed controller repair

    Hi H, I will try that first. Is there a resistive test, for MOSFETS? C.
  8. camerart

    Clarke CCRT266 Speed controller repair

    Hi, I just did the same! The schematic, is as the drill circuit, so that gives a bit of clarity. The drill is not mine, and I think it has been used for grinding solder and copper, both of which are sticky, so would put a load on it. It is used to sculpture, and I'm repairing it in payment...
  9. camerart

    Clarke CCRT266 Speed controller repair

    Hi H, Thanks for your research. I'll try to find the PDF, so I can see the PIN outs. I actually don't think this chip is at fault, and agree that the MOFET is at fault. I have removed it and my amateur readings from it appear to prove it's faulty. When I opened up the drill, the MOFET was...
  10. camerart

    Clarke CCRT266 Speed controller repair

    Hi, Here is a clearer image of the PCB. C.
  11. camerart

    Clarke CCRT266 Speed controller repair

    Hi H, Ok, I'll retry. The markings on the chip: SY (In a circle) 069B 201628C C.
  12. camerart

    Clarke CCRT266 Speed controller repair

    Hi, Can anyone help me to find the 8PIN chip for the Clarke CCRT266 Speed controller please? Markings: SY (In a circle) 069B 201628C Shown here: Camerart
  13. camerart

    Programming PIC to sontrol 6x SERVOs

    Hi B, Thank you for your patience explaining how the TIMER works. It is almost working, but needs Oshonsoft language skills to go farther. Much appreciated, Camerart
  14. camerart

    Programming PIC to sontrol 6x SERVOs

    Hi B, How does this look so far? I can see that there are some mistakes,and some lines for testing, that need removing. If you can look at the INTERRUPT LOOP, and see if it looks something like your ideas. I have a waitms 14, which will be calculated later as a TMR0 delay. Should there be...
  15. camerart

    Programming PIC to sontrol 6x SERVOs

    Hi B, When you say I have a delay, do you mean this: 'WaitUs timxh ? The apostrophe is when it is commented out. I realised my mistake. Thanks, I'll try again tomorrow. C.
  16. camerart

    Programming PIC to sontrol 6x SERVOs

    Hi B, I've made a start on the #33 instructions. Is this on the correct path? C.
  17. camerart

    Programming PIC to sontrol 6x SERVOs

    Hi B, Is it important to have the TIMER control everything? I have been setting the SERVO ON time from an incoming serial connection, then subtracting the ON time from 2500us to give the OFF time. e,g, Trigger each SERVO with the TIMER, SERVO1 ON/OFF for a total of 2500us, then SERVO2 and so...
  18. camerart

    Programming PIC to sontrol 6x SERVOs

    Hi B, I have your instructions in #33, but I had a lot processing rattling around my mind, so I purged it and got a program that simulates, here: C
  19. camerart

    Programming PIC to sontrol 6x SERVOs

    Hi B, Ok, thanks for the offer. C
  20. camerart

    Programming PIC to sontrol 6x SERVOs

    Hi B, As you say, magic! I'll have a go at programming your suggestion, thanks. C.
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