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  1. BobK

    Arduino Nano LEDs pin failure

    It is still still unclear what you are doing. Everyone here is assuming you have 10 individual LEDs, each connected to a different output pin. But, first you refer to two strands of LEDs, and later you refer two LED strips. I think you are hooking up one strip to 5 outputs and a second...
  2. BobK

    2N2222A current buffer circuit

    Show us a circuit. 2V is the minimum theshold voltage. You need to go by the max, which is 4V. And at the threshold voltage, it only passes 250uA. And the source should be connected to ground, no Vcc. Bob
  3. BobK

    2N2222A current buffer circuit

    MOSFETs are voltage operated and do not need any appreciable current, so you still are not describing the problem correctly. What is the voltage of the signal when ON and when OFF? Most likely, a logic level MOSFET is what you need. These can be turned on with voltages in the 3-5V range. Bob
  4. BobK

    2N2222A current buffer circuit

    You need to tell us what you are trying to do. Signals are not usually currents (though they might be). Are you talking about linear amplification (duplicating a waveform) or are you just talking about using a digital signal to turn something on or off? Bob
  5. BobK

    Help a noob!

    Not even close to a beginner project. How many years do you have to complete it? That is the easiest part, it is called a text message. Bob
  6. BobK

    Replace 9Volt Battery with Solar Panel

    But more dangerous. And around here a real bitch if there happens to be 3 feet of snow on the ground. Bob
  7. BobK

    BMS for Lithium Iron phosphate battery bank LiFePo4

    I kust looked on Ebay. BMS boards for 8 cells are available. Why are you messing with 2 desinged for 4 cells? Bob
  8. BobK

    BMS for Lithium Iron phosphate battery bank LiFePo4

    1. You cannot power devices in series when the current they draw is variable. 2. You cannot charge them to 3.6 x 8 = 28.8V from a 24V source. Get two isolated DC to DC converters to power the two BMS boards separately. Bob
  9. BobK

    Replace 9Volt Battery with Solar Panel

    NiMH batteries would be best for this application. They are 1.2V so you can't actually get 9V, 8 of them will give you 9.6V. Then you need a battery management system to charge them. It is really not a simple project. Bob
  10. BobK

    Programming PIC to sontrol 6x SERVOs

    Ah, okay. Like I said, I was not familiar with the language you are using. Bob
  11. BobK

    Replace 9Volt Battery with Solar Panel

    Good for you, and welcome to the forum. You need to determine how much current the motion detectors use. As an aside, what do they do when they detect motion? Do they have to operate after dark or on cloudy days? If so, you need to have a battery that is charged by the solar panel for...
  12. BobK

    Programming PIC to sontrol 6x SERVOs

    I am afraid not. I don't know the basic language you are using, so I can't really write the actual code for you, but here are some comments. You get off to a good start by checking the servo number with if statements, but you need to do a lot more in each if. You have a delay in the handler...
  13. BobK

    BMS for Lithium Iron phosphate battery bank LiFePo4

    You fail to show the connections to the charging power. Unless you are using two isolated supplies, The battery on the left is shorted. This one has the + inputs and outputs common. Bob
  14. BobK

    Darlington transistor suggestion ?

    Harald's circuit is a level translator. Inverting in this case. Bob
  15. BobK

    Darlington transistor suggestion ?

    If you use a BJT to switch a MOSFET, and the switching frequency is less tham about 10 KHz, the BJT might need only microamps of base current. You can also find MOSFETs that will switch at 2.5V, though they might not handle your current requirements. Bit who kniows since you haven’t told us...
  16. BobK

    Darlington transistor suggestion ?

    Why don’t you tell us what current you need at what voltage drop? There are many solutions, and you seem to have fixated one the one that will not work. Bob
  17. BobK

    ebike with speaker amp as a watt amperage is it possible

    No one could have interpreted your original post to mean this. Our ability to answer your questions depends on your ability to communicate them effectively. Bob
  18. BobK

    Darlington transistor suggestion ?

    Use a BJT to switch a MOSFET. Bob
  19. BobK

    BMS for Lithium Iron phosphate battery bank LiFePo4

    No comment on my post, which actually attempts to adress the problem? Bob
  20. BobK

    Perfboard replacement

    Do you have Amazon Prime? You could have it by Friday. https://www.amazon.com/Paxcoo-Double-Sided-Board-Prototype/dp/B01M7R5YIB/ref=sr_1_7?ie=UTF8&qid=1529524234&sr=8-7&keywords=perfboard Bob
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