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  1. Thread: String matching?

    by amgen
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    14
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    488

    Re: String matching?

    or you can pick a location in flash to store starting place with the "org" directive


    8817
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    RISC instructions explained

    A good video about RISC computer instructions

    https://youtu.be/wjHlvQfo5uI
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    2,405

    Re: Solar Panel battery charger

    Charging at 50 or 100 amps.... use a heavy duty relay to charge/stop charging. Charge for a while, switch off, check battery voltage then charge more or not.
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    16,346

    Re: PIC USB HID breakout board

    I used Visual Studio (free) VB. No support for usb, but plenty for network stuff. Was not to hard to make 'application' to send and receive from network
    8810
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    16,346

    Re: PIC USB HID breakout board

    you put a lot of work in that. The usb always deterred me due to all the programming just for sending and receiving. The wifi modules were much easier to deal with. I was able to program some 8266...
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    Re: Strange issue with SSR

    just put led in series with ssr + and no resister
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    3,410

    Re: Current limit for HV Power Supply

    alternate place for I limit circuit.....8725
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    3,410

    Re: Current limit for HV Power Supply

    just out of curiosity, what is the pwm freq. ?
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    3,410

    Re: Current limit for HV Power Supply

    how about, the current limit is tripped when I=.4 amps...… instantaneous that is and that limit ckt would work for linear to hold to .4, but with pwm, the current levels can goes over that. Short...
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    Re: Serial to WiFi Wifi to virtual com port

    I have set up the ESP05 and 12 serial to wifi modules (ridiculously cheap...$5, $7). Then had to program them to be "transparent bridge" so when powered up, they just act like a serial connection for...
  11. Thread: Chattering relay

    by amgen
    Replies
    10
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    2,405

    Re: Chattering relay

    I see your software worked but you might need more capacitor filtering of the A/D voltage input, especially when operating relay
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    Re: Safely getting out of an interrupt

    so, on rcv-int.... save the character to mem or ram to work on in basic later, and raise some flag to be checked in basic that char is in system and leave int.... only takes few micro-seconds to...
  13. Re: High Voltage, MCU controled 300Volt power supply

    I would..... use triac or power mosfet, phase control or pwm. PiC can do all control, Vfb voltage feed back. current feed back and isolated opto drivers.... smooth the output as desired etc. sorry...
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    Re: Ethernet with microcontrollers

    Much more 'logical' to add a module, and a wifi module at that. These modules today have 32 bit processors and big memory for the tasks for network and wifi. Plus some are only few $ and a fraction...
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    Re: Help with scaling math..

    your chart with equation.... how to remove first image???

    8408
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    1,684

    Terminal Program for TCP

    Unless, as in the past, I am behind in technology and this is readily available,
    In the interest of easier communications with PIC over IP network, and ultimately a SSE.... server side events type...
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    Re: quick question 12F683

    if your pin is an analog pin, use the a/d mode to make a thresh-hold that works.......
    (beat me by 2 minutes)
  18. Re: Can we make a digital pot simulate a much larger value?

    8363

    R is max value of pot (mosfet is off), have to test range of voltage to mosfet gate to get your pot value operation, then use the digital pot to work within that range. If need isolation,...
  19. Thread: Timer SubRoutine

    by amgen
    Replies
    7
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    2,736

    Re: Timer SubRoutine

    I had similar circuit for a battery charger setup. I used 2 main loops, 1 for off and 1 for on. you can use for-next or while loops. set the counts based on how often you want to check the a/d values...
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    Re: RMS vs Average voltage

    because of the phase shift between voltage and current- for inductive and capacitive loads, but for pure resistive loads, the current and voltage are in sync
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    Re: RMS vs Average voltage

    yes but, since heater elements are almost 100% resistive, (no phase shifting between current and voltage) the output can be set with simple percentage type table values and no need to try to find rms...
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    Re: Using INCLUDE to add a text file in PBP3

    has to be 18f device, org 0x.... start location in program memory..... quotes around text, spaces have to be added with dec 34, cr is dec 13
    that is text and decimals or hex numbers placed in...
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    Re: Long / short press button...but reading ADC

    I have used 'for loop' to test for switch press duration as such....you would use your adc reading instead of GPIO check


    if GPIO.1= 1 then start ' gpio is 1 for no press, 0 for...
  24. Thread: HTML design tool

    by amgen
    Replies
    1
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    2,138

    Re: HTML design tool

    you can also place your html in a text type document using notepad or better yet notepad++ (used by programmers). Then you save as file type htm. Then that file opens with your browser of your...
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    Re: Monitor supply voltage of chip?

    microchip has a to92 voltage detector...... different voltages and draws 1 microamp....
    http://ww1.microchip.com/downloads/en/DeviceDoc/21434g.pdf
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