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  1. Replies
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    Re: Battery power back-uped circuit

    I agree with this.

    When we order batts, there is option having it with the protection; As it is an option and if you have a smart charging circuit, then it just additional cost which I think is...
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    Re: Can PBP read optical encoder damn fast? :)

    You may have a timer in counter mode in background; so you can do things in foreground while it counts in background.
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    Re: RF Communication over ESP, BLE or other

    Thank you Richard; It was a good video indeed.

    Here is another one for ESP to ESP.
    Surprising result; over 1KM comm distance.


    https://youtu.be/ekSsi83-x8M
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    Re: RF Communication over ESP, BLE or other

    ESP-NOW does not use TCP protocol. This is true, but ESP does.
    NodeMCU also has TCP protocol.
    Why there is no TCP in ESP-NOW, one may ask; I have no idea. Need to check further.
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    Re: RF Communication over ESP, BLE or other

    For ESP, wake up could be fast but then it needs to connect via a protocol;
    Using TCP type protocol, connection may take some time especially after when connection is lost and a reconnect is needed;...
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    Re: RF Communication over ESP, BLE or other

    http://www.hoperf.com/modules/2.4g/RFM75.html
  7. Replies
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    Re: RF Communication over ESP, BLE or other

    Ioannis,

    What will you transmit? 1-byte at once? 1 bit?
    Multiple bytes?
  8. Replies
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    Re: Battery power back-uped circuit

    This statement is giving me naughty thoughts :D
  9. Replies
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    Re: Battery power back-uped circuit

    Why is not not accurate?
    I get 1.024V with 1x output.
    And if the Vdd is 2,5V I still have 1.024V at my FVR output. I never encountered an accuracy issue.

    But, if you have a high freq circuity...
  10. Replies
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    Re: Battery power back-uped circuit

    Consider this one: DMP3099L-7

    I have my own charging circuit controlled by PIC with FVR.
    Measure batt voltage by adc read on FVR to calculate the batt voltage.
    If over 4.25V then cut the charge;...
  11. Replies
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    Re: Battery power back-uped circuit

    As Richard pointed out risk of fire, you may want to consider Li-fepo4 batteries.
    Almost no risk of fire under high heat, short circuit or over charging ...

    But they are 3.2 Volts.
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    Re: Random Picture Thread

    I meant these !!!
    Female ?

    8854
  13. Replies
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    Re: Random Picture Thread

    It seems to be a female thing.
    Or is it just me?
  14. Replies
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    Re: Asm sleep - pbp sleep

    Then here we go Wayne;

    I'm very sure, this never happened to me before
    I met you and now I'm sure
    This never happened before
    Now I see, this is the way it's supposed to be
    I met you and now I...
  15. Replies
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    Re: Asm sleep - pbp sleep

    Wayne,
    Pay attention to Rihard's code there. The first ting after SLEEP must be NOP.
    You did not have NOP as the first thing atfer SLEEP in your code.

    and WDT is OFF in config; how can it be an...
  16. Replies
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    Re: Asm sleep - pbp sleep

    Your MCLRE is ON.
    If you are using power adapter (not battery), make sure you have 100nf cap from MCLRE pin to GND. And I am not even asking about 4K7 - 10K res to vdd; Assuming it is already there....
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    Re: Asm sleep - pbp sleep

    Yes, I checked it again. For some reason I remember to have two NOPs. Sorry for that. Have one or three. It is up to you. :)
  18. Replies
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    Re: Asm sleep - pbp sleep

    Here is something from me:

    1. Leave the RX pin unconnected for testing. Check the pin state. Does it stay low or high? If it is high and you get int at high already, then it never sleeps.
    2. IF...
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    Re: Minsky algorithm

    Good quality stuff there.

    Thank you for sharing the link.
  20. Re: Is it possible to make unidirectional serial port via 1 pin with PBP?

    For one pin bi-directional communication, without hardware serial port but with Serin and Serout soft commands; here is something to work on. Just a demo.
    I chose 628A for demo because of its...
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    Re: 4 -20mA Analogue input help

    Yes, I think so; Most likely it will burn the i/O circuity of the pin.
    If not, you get reset.

    And, most of the time, people tend to connect sensors without powering-off the reader device. So ...
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    Re: 4 -20mA Analogue input help

    If you will use 10-bit ADC to read the voltage on 250R resistor, why would you need an opamp?250R will give you 5V at 20mA max.and, 1V at 4mA lowest.Your ADC reading will be from 205 to 1023.And...
  23. Thread: DT_INTS for K42

    by sayzer
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    4,649

    Re: DT_INTS for K42

    I have also been using c for long time so far; I have been able to convert some Arduino libraries, too.
    The thing is, as mentioned earlier, moving from one compiler to another in c is much easier...
  24. Thread: Forum Adverts

    by sayzer
    Replies
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    4,447

    Re: Forum Adverts

    Big size and hot stuff ?
    Like 250W soldering iron? or what?
    I am confused here.
  25. Thread: Forum Adverts

    by sayzer
    Replies
    13
    Views
    4,447

    Re: Forum Adverts

    Do you guys always see technical stuff on the ads, or is it just me? Is it something specific to the forum ad choice or google trace & pick thingie?
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