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  1. chopnhack

    hospital yet again

    Hi Dave, sorry I am late to the party and sorry to hear for your ailment and troubles with the health care system. I hope you can find someone that has seen your condition or similar and be able to give you a course of therapy. Speedy resolution!!
  2. chopnhack

    8-Pin Development Board

    Waiting on some tactile switches to complete the circuit, but then on to programming! (I have the PIC, didn't want it in until the switches come in) I did a power on, green LED lit, nothing smoked, ;-) I checked all the traces before populating and found one shorted to another and three...
  3. chopnhack

    Microcontroller Beginner

    To start you would have to select what family of μcu's you want to work with. ARM, PIC, etc. Here is a post that you may find useful: https://www.electronicspoint.com/threads/help-getting-started-with-pic-microcontrollers.269028/
  4. chopnhack

    8-Pin Development Board

    The small 100nF is a decoupling cap (this is for noise). The 2.2uF is to act as a battery for the PIC so that when it is in operation if there is a dip, such as when peripherals draw too much current, it can buffer the 5+ rail - got it! Where do you suggest placing the 2.2 lytic? In parallel...
  5. chopnhack

    8-Pin Development Board

    Easier said than done, the local equivalent of Maplins (Radio Shack) has gone bankcrupt and liquidated their components supply. Of course I was busy during this period and missed out on some scores. There weren't many in this area. I rely mostly on E-Bay for sourcing bulk components. Can I use...
  6. chopnhack

    8-Pin Development Board

    Thanks for catching that mistake Adam! I appreciate the words of encouragement - it is getting slightly easier, but there is so much to learn still! I do have a cap across the pins of the PIC, best I have on hand is a 0.1uF ceramic. Here is the updated schematic: Any other features I should add...
  7. chopnhack

    8-Pin Development Board

    I just completed a schematic for a 8 pin PIC dev. board to get some hands on experience with a simple mcu. Six I/O pins shouldn't get me into much trouble, I hope! Can anyone review this? I am looking for errors as well as suggestions. I think that what I have shown will allow some simple...
  8. chopnhack

    What is the diode going to?

    Thanks Adam. In the last schematic I posted, I think it works by providing similar safety against high programming voltage by clamping the voltage to no more than 5.1v (the zener that is mislabeled as 1n750). What are your thoughts on it?
  9. chopnhack

    What is the diode going to?

    While I was trying to make sense of the first schematic I stumbled across another method of protecting the pic/associated circuits from high programming voltage. The zener is rated at 5.1V, the square represents a pic mcu. From what I understand, when the ICSP is in use, higher programming...
  10. chopnhack

    What is the diode going to?

    Wow... I think I need to put the datasheet down...
  11. chopnhack

    capacitor

    Glad I could help ;)
  12. chopnhack

    capacitor

    You want to use a capacitor that is rated at 2x the working voltage or more for safety sake. The voltage rating is the maximum voltage across the capacitor that it can safely handle. You can use sizes bigger that what is required, they will only be bulkier than necessary. Use one that is too...
  13. chopnhack

    What is the diode going to?

    Does anyone know what the diode is connected to at the top left hand corner?? The datasheet recommends this method of connection to protect the μcu, which makes sense with high voltage programming potentially damaging the chip. I'm just a little confused as to why its not labelled and what is it...
  14. chopnhack

    Different power supply or just throw in a voltage regulator?

    I know its been awhile, but I came across this - a little more complex than perhaps what you were thinking, but you might enjoy seeing it:
  15. chopnhack

    Rest in Peace, Kris

    Donna, I have had Kris on my mind every day, since his passing and wondered what happened to him. Thank you for shedding some light on the mystery of his passing. I can only imagine how hard this has been and continues to be... you are wonderful for taking the time to think of us and for sharing...
  16. chopnhack

    Custom made Visual Poi

    My best guess at attempting something like this would be to use smd 5050 rgb LED's. Something like the link, at 5mm square they are fairly small. Perhaps a hexagon or octagon of strips would be enough to provide near enough to 360 degree coverage to equal the manufactured product. I would...
  17. chopnhack

    PCB building

    Those look pretty sharp Constantine! Good work :-)
  18. chopnhack

    Home Security Cameras System

    Do you suffer any bandwidth issues with the camera recording on high resolution? I know that it becomes an issue with more than one recording at high def. lot of data moving!
  19. chopnhack

    Why do my leds blink on this power supply?

    Some suggestions: Use perfboard for all your components and then run insulated wire from that to the actual LED units. This way you can keep all your higher voltage wiring, including your mains plug or plug pack outside of the tank. You will have less moisture on your electrical parts too! You...
  20. chopnhack

    Why do my leds blink on this power supply?

    Aside from the excellent advice already received, you stated some problems that have to do with assembly methods. At the very least, you may want to pickup some shrink tubing to isolate the legs of the 317 (if you followed the instructables way of building). Can you post a picture of your...
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