Search results

Search Forums New Posts
  1. BobK

    Dc booster to step down

    It is a a step down converter, not a booster. It steps down voltage, not current. Bob
  2. BobK

    Buffer Cicuit

    What are you going to do with that 3V? If it is is just a signal going to a high impedance input, the solution is 2 resistors aka a voltage divider. Bob
  3. BobK

    Building a comparator

    There are plenty of things you can learn about electronics that are less likely to set your house on fire. Charging Lithium Ion batteries is one of the most dangerous things you can do that does not involve high voltage, which is another thing I would not recommend for beginners. If you were...
  4. BobK

    Boost Converter To Charge Laptop From Car Battery Problem

    Those cheap boards often require a heat sink added to reach their rated output. Sometimes they even say so. Bob
  5. BobK

    How do I simulate a double throw, single pole, voltage controlled switch in LTSpice?

    You can do it with two SPST switches: common one terminal, and drive rhe two inputs with inverted signals. Bob
  6. BobK

    How do I simulate a double throw, single pole, voltage controlled switch in LTSpice?

    Two S I guess you missed the "voltage controlled' part. Bob
  7. BobK

    Baseball Scoreboard

    Well, it's actually more complicated that that, the balls and strikes would have to reset each other, and possibly increment the outs as well. If you did that, you would need fewer channels of remote. With the 8-channel (7 used) you would simply turn each light on / off with a separate button...
  8. BobK

    Boosting transformer current output

    If you can't supply the specs of the transformer, at least tell use how large it is. A pic with a ruler would be good. Bob
  9. BobK

    Calculate how long a battery will feed a project

    For that amount of power, nothing but a switch mode power supply will do. Otherwise you would be wasting 7/12 or 58% of the battery power. Also, show us how you got 0.6KWH per day. I calculate that typical strips would use nearly an order of magnitude more than that. Bob
  10. BobK

    Solar panel no amperage

    I vote for a blown fuse in the meter due to all the times I forgot my meter was set to mA and I tried to measure a voltage. Bob
  11. BobK

    Partialy Discharging Capacitor

    Yes, that is what i am talking about. Bob
  12. BobK

    Building a comparator

    It amazes me that people with little knowledge keep trying to build LiIon battery chargers when the likes of Apple, Samsung and Boeing can't get it right. Bob
  13. BobK

    Any idea for this switch?

    Terms like "activates for a split second" might make sense to you, be we electronics people know how to split a second many ways. We would also need to know that the switch is controlling, AC or DC voltage and current specifically. Bob
  14. BobK

    JK Flip-Flop + D-Type Flip_flop

    If it is an edge trigerred flip flop yes. That will not work with a transparent latch, which is the simple form of a D flop-flop. Bob
  15. BobK

    How do I run a dc motor slowly?

    Which amountd to a gear motor, which everyone was suggesting and you were rejecting. Oh, well. Bob
  16. BobK

    JK Flip-Flop + D-Type Flip_flop

    Except that is not true for D-flip-flops, one of the type he was asking about. Bob
  17. BobK

    Partialy Discharging Capacitor

    Your latest schematic just shows a flash tube with an SCR trigger. It does not change the duration of the flash. For the third time, the scr has to go across the capacitor CS in you latest drawing to dump the charge after a time. And it must be driven by a monostable circuit triggered at the...
  18. BobK

    design of RTOS using few features

    The main purpose was academic, to see what I could do with a very tiny microcontroller. I used a PIC12F575 which is very small indeed, If I remember correctly, only 32 bytes of memory. I actually used it in a color changing LED application with a digital display and 3 button interface. The...
  19. BobK

    DC Voltage conversion for miniature bulbs?

    Nope. I am not in touch with anyone else doing electronics in Worcester. I do know a lot of ballroom dancers though :) Bob
  20. BobK

    Voltage dropping in resistor

    A wire cannot have an excess of charge at one end, it will simply flow through the wire to neutralize. Of course, wires do have some resistance, and a small diameter wire carrying a large current will show a voltage drop dependent on the resistance of the wire and the current. Bob
Top