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  1. Minder

    PIC16f877A Blinking an LED

    Not tested but this is something to go on. Look up the tutorials on the Nigel Goodwin site, shows the code you need. Do a search of you program files dir for *.INC M. CBLOCK 0x20 ; Start of General purpose registers STORE1 STORE2 endc RESET_VECTOR CODE...
  2. Minder

    PIC16f877A Blinking an LED

    You can get it either from you Picmicro directory if you have downloaded the MPLAB IDE, or off the Picmicro site. When running an application in MPLAB it goes under Header Files. I am not saying it will change anything just makes it easier to program with register names instead of having to look...
  3. Minder

    Help Identify the component

    Before the current tendency of manufacturers practice of putting up PDF's on their web sites, there was a practice of distributing many hard copy technical manuals, Fortunately I still have many of mine accumulated from the 80's and on, including the GE Transient Voltage Suppression Manual...
  4. Minder

    Help Identify the component

    Not sure what is meant by 'divert the current to ground'? in the majority of cases they are connected across the input supply etc, generally the suppression WRT ground is a low value capacitor. There are also suppression filters that consist of L/C arrangement often fitted to the input of...
  5. Minder

    Help Identify the component

    MOV's or VDR's (voltage dependant resistors) are there to suppress voltage spikes that exceed the voltage and energy level of the spike, they are rated in voltage and Joule level. The most often fail open when a spike that exceeds the joule rating is seen. If fail shorted then obviously they...
  6. Minder

    PIC16f877A Blinking an LED

    It is much easier to follow when register names are used instead of addresses, when using the INC file. M.
  7. Minder

    PIC16f877A Blinking an LED

    Also it is preferred to use the .INC file for your pic, then you won't need to enter a register address, just the name. M.
  8. Minder

    PIC16f877A Blinking an LED

    I have not used that pic, but most come with the output set for analogue. confirm with the manual. See ADCON1. Also setting port for I/O. in the manual. M.
  9. Minder

    Microcontroller interrupt

    If you look at the Picmicro lit. it explains interrupts, if a certain process or module requires an interrupt, you set a flag that is unique and applies only to that process. Interrupts are serviced sequentially, if more than one. In later Pic's there is a low priority or high priority...
  10. Minder

    Time Base and Crystal

    The methods show oscillators that need smaller and compact components. Another method is to use 32Khz clock Xtal input to the T1 source on a Picmicro can be made to accurately roll over every second. M.
  11. Minder

    How to change the frequency of AC mains supply

    This is most likely a impeller driven pump, if so any restriction will reduce current in the motor, I doubt we are talking of a gear pump or similar? M.
  12. Minder

    Capacitor Question

    In your case they appear to be just for spurious noise suppression. M.
  13. Minder

    How to change the frequency of AC mains supply

    If you only need to lower the flow, you can throttle the intake, if it is a impeller pump the current will drop when throttled off. As mentioned, do not try a variable frequency on a 1ph cap start induction motor, especially a pump, they drop out of run under load at low rpm. M.
  14. Minder

    Standard equipment for beginners

    Often used tools in my kit is needle nose pliers, sharp wire snips (small), Range of small screwdrivers, wire strippers, other handy items now or later is magnifying glass, dental picks, magnetic wand, bench vise (panavise) , 6" hacksaw. M.
  15. Minder

    10 pin smd ic that the number 4704 ID

    There is also a Maxim 10 pin MAX7404 analog IC. https://datasheets.maximintegrated.com/en/ds/MAX4704.pdf M.
  16. Minder

    Does this part exist?

    Another source which I think you will have access to is Idec AL6Q series for small footprint, and also Telemecanique, most of which are now coming out of China on ebay. M.
  17. Minder

    Does this part exist?

    Depends on the foot print you are looking for, they are very common in the industrial control world, for example the Emergency stop button!! You can get various ones with both N.O. N.C. contacts push on-push off. Long time since I worked in UK so I don't know what your sources would be, but look...
  18. Minder

    Trying to identify this "fuse"?

    ..I have generally come across the opposite! https://en.wikipedia.org/wiki/Reference_designator Max.
  19. Minder

    How to read this timing diagram

    See these. M.
  20. Minder

    Trying to identify this "fuse"?

    Odd they use the X designator, usually a crystal has a Y designation. Max.
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