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  1. Replies
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    1,408

    Re: Strange issue with SSR

    just put led in series with ssr + and no resister
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    1,766

    Re: Current limit for HV Power Supply

    alternate place for I limit circuit.....8725
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    Re: Current limit for HV Power Supply

    just out of curiosity, what is the pwm freq. ?
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    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...
  6. Thread: Chattering relay

    by amgen
    Replies
    10
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    1,862

    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...
  8. 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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    1,495

    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)
  13. 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,...
  14. Thread: Timer SubRoutine

    by amgen
    Replies
    7
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    2,562

    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...
  18. Replies
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    12,443

    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...
  19. Thread: HTML design tool

    by amgen
    Replies
    1
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    1,793

    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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    Re: different software times, impossible?

    from what you have described so far, it may be easier than it seems to implement this..... maybe.
    1, you have to use timer interrupt at 50micro seconds..... the highest common value for both times...
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    2,090

    Re: DT_Interupts with 18F2525

    could also check the serial data polarity coming to pic..... may need inverted
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    2,973

    Re: How to Serial comm. wait for a string?

    for discussion purposes,I have been working on a general send/receive scheme to use for pic's. It is more like a module or object type of situation since you would always set up various registers,...
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    Re: Dimming Thermostat - general questions

    you have 120- half cycles per second that you can cycle....... you can break that down to 60/half second or 30 per quarter second....... if you consider controlling for 4 times a second, then you can...
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    Re: Strange WRITECODE behaviour

    I think you are trying to change memory locations that are in use at the time by your program...... locations for reset and interrupt vectors are used by basic program..... unless its just data not...
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