Search results

  1. 2

    25V vs 35V capacitor?

    hello I am using the following power supply along with the external devices shown in the EMC recommended circuit section. The problem is the recommended C2 capacitor’s diameter is too large. It’s 8 mm but I would need something like 6 mm. In reference to power supply part# : PBO-5-S3.3, under...
  2. 2

    Measuring the current used in a power supply?

    Hi guys, I was thinking of using the INA169 to achieve current sensing: https://www.sparkfun.com/products/12040 the power supply I want to monitor is located at: https://www.digikey.ca/products/en?keywords=pbo-5-s3.3 I was wondering if this would work? Thank you for your help
  3. 2

    Measuring the current used in a power supply?

    hello, I have a power supply converter that converts 120VAC to 3.3VDC at 1A. I would like to know (without measuring with an ammeter) when I am drawing 800 milliampères or more. When 800+ milliampères are used, I want to light up a led to indicate that the power supply has attained 80% of its...
  4. 2

    The curve of the sun?

    Thanks all for your replies, I would simply need to know where at a given latitude degree (ex: 45Deg North = Montreal), how much daylight is available every day throughout the year (365 days) based on the sunrises and sunsets. In other words for example, lets pick a date at random... suppose I...
  5. 2

    The curve of the sun?

    Hello, In reference to the following link: http://www.physicalgeography.net/fundamentals/6i.html In reference to the graph on page 2 of 4 (Fig. 6i-2). What are they trying to tell me? If we look at the 50 degrees North line (The red one), It seems that approximately in mid June, the maximum...
  6. 2

    Level signal compatibility?

    cool KrisBlueNZ !! thanks for your valuable insight! 24V
  7. 2

    Level signal compatibility?

    wow.... I have pretty much always used a logic probe when checking logic outputs of my Ttl chips and assuming that a high was 5vdc. Thankyou all for your help !!! 24V
  8. 2

    Level signal compatibility?

    Hello, I have an output from a quad 3 state buffer chip 74LS126 (Which operates at 5.0Vdc and its output will most likely be 5.0VDC when high) and this output needs to be fed into an input of a PIC32 MCU which its maximum input voltage tolerance is approx. 3.6VDC. Assuming the MCU takes in...
  9. 2

    Led flikers?

    Hi KrisBlueNZ, Thanks for your help.... for I have taken already too much of your time.... I think I can take it from here... Thanks for your time/help ! Very appreciated.... Have a nice 24v
  10. 2

    Led flikers?

    Hello KrisBlueNZ, First, I would sincerely like to thank you for your effort in helping me this way, its so nice of you ! Okay I understand. I was also wondering though, I wouldn't need the NPN transistor (as you mentioned -Q1) if my load at PGO would be less than 10 ma... right? Just want...
  11. 2

    Led flikers?

    Hi KrisBlueNZ, wow, I didn't even know these things existed LOL I have seen one that pretty much does what I need for now, its theTPS3510P at http://www.ti.com/lit/ds/symlink/tps3510.pdf I have a question. -According to the spec, the PGO pin is specked at 10 ma sinking current. Does this...
  12. 2

    Led flikers?

    Hi Harald Kapp, I don't know why I put the Led and resistor at the emitter side of T1?? I always get lured into using the emitter bias configuration figuring that it will stabilize my circuit a little better. But you did solve the problem and I thank you very much. I relocated the led and the...
  13. 2

    Led flikers?

    Hello, I am designing a small board where it requires several power supplies. they are 3.3VDC, 5VDC and later perhaps 12VDC. In this board, I am trying to design a small circuit which detects if any of these voltages are missing on the board. If all the voltages are available a green led will...
  14. 2

    looking for a 10 bit transceiver with latches?

    Yup .... It's true!
  15. 2

    looking for a 10 bit transceiver with latches?

    Yeah thanks Steve I appreciate your reply. however I really do need the 10 bits.... I have been looking all over the place and could not Find it. I just think I will get myself a 2.00$ CPLD and Do it myself . Cheers and thanks for replying
  16. 2

    looking for a 10 bit transceiver with latches?

    Hello, I have found this part at: http://www.ti.com/lit/ds/sccs035a/sccs035a.pdf which is a unidirectional 10 bit latch with 3 state outputs employing two enables of which I require in my design. I was wondering though, is there any parts out there that have the same thing but...
  17. 2

    PIC mcu memory question

    wow ... and this makes it another thing to worry about !!! LOL what a world!!
  18. 2

    PIC mcu memory question

    I think the OP is asking if we can read the program memory (the program running in the chip) while the chip is protected!!! I guess!
  19. 2

    Malloc and it's use with MCUs

    Understood! thanks KrisBlueNZ!
  20. 2

    Malloc and it's use with MCUs

    yes, exactly and furthermore if our malloc blocks can be the same size (ex: 1K) so we can make sure they all fit in the allocated heap size, and thus for predictability purposes, and then malloc/free different size blocks as many times as we want but never surpassing the 1K limit per block and...
Top