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  1. foTONICS

    Wireless trigger for LEDs and buzzers

    okay so I just bought an arduino uno and am now going to buy a pair of those transceivers
  2. foTONICS

    Wireless trigger for LEDs and buzzers

    I'm a big pic fan and have all different kinds and I may try using one of these transceivers with it, maybe we can even collaborate and get something working :)
  3. foTONICS

    Wireless trigger for LEDs and buzzers

    Okay I don't mean to hi-jack this thread but wireless/internet enabled electronics has always been my weak point. While searching for "wireless" I came across this thread. I found a nRF24L01 module shown here. Is this one of the 'cheap' ones that you guys speak of? I'm thinking of using this...
  4. foTONICS

    switch debouncing

    Would an interrupt be of good use here or is it dangerous to have interrupts 'interrupting' things that deal with bouncing?
  5. foTONICS

    switch debouncing

    Hey all, I was checking out Gooligum's tutorials and came across this C code for switch debouncing: for (db_cnt = 0; db_cnt < 10; ) { _delay_ms(1); if (GPIObits.GP3 == 0) db_cnt++; else db_cnt = 0; } I understand how it all works but once...
  6. foTONICS

    basic needs for a home made wind turbine?

    Perfect, even better than 'RTFM'
  7. foTONICS

    stepping down voltage twice

    Hey all! First of all thanks for all the feedback, suggestions, and help. I've made the capacitor changes as suggested and after some circuit modifications have it working. Although I'm not 100% sure I think the problem was caused by the motor driver I was using. I added some pull down...
  8. foTONICS

    high side driver

    here is the breadboard
  9. foTONICS

    high side driver

    The reason I'm using MJE3055T's is because they are the only power transistors I have on hand(I don't have any PNP power transistors). I rebuilt the circuit, it works as it should and nothing over heats. The only modification would be your suggestion of base resistors from the control signals...
  10. foTONICS

    high side driver

    I'll whip together the other half and let you know about the voltage drop across Q2 and I'll add some base resistors
  11. foTONICS

    high side driver

    I noticed that I left out something that may be of importance. I origrinally tested half of this motor driver, comprising of only the transistors necessary to make the motor operate in one direction. This consisted of Q 1,2,6, and 7(I forgot to label a few of the transistors so assume 7 is the...
  12. foTONICS

    high side driver

    When I have a chance to play with the circuit some more I'll let you know no just Q2 the motor is only drawing at max about an amp and given the typical hfe values of MJE3055 is this a big issue?
  13. foTONICS

    high side driver

    Hey guys, So with a little help and research I came up with this circuit but Q2 keeps getting really hot. I've made sure at least one of the control signals is always high so I was wondering if anyone could give a little constructive criticism towards it, -thanks for all the help
  14. foTONICS

    stepping down voltage twice

    no load about 67mA (which is what I was testing it under)
  15. foTONICS

    stepping down voltage twice

    Can that be reason enough for my missing volt? Don't the comparators come in a quad package IC? I was touching them and not feeling anything close to hot
  16. foTONICS

    stepping down voltage twice

    I'll post some photo's in a bit but for the time being I thought I should clarify something. I've attached a picture of the style of regulators I'm using. I'm not using any heat sinks, just straight up breadboard trying to get the basic's working. I'll get back to you on the motor, im not...
  17. foTONICS

    stepping down voltage twice

    I've attached a picture of the circuit I'm trying to breadboard. I've left out the diodes and I used a power supply to mimic the solar panel input The output of the 7812 is powering a 12vdc motor and the 7805 is the supply to a l293d quad open collector comparator IC. the east and west...
  18. foTONICS

    Driving a 12v DC motor

    I know it's not an H-bridge, I was having issues getting the full H-bridge working so I took it apart to see if I could get parts of it working but still no success. Since then I have figured out to get the motor the 12V I need a high side driver. I looked up the values of hfe of the...
  19. foTONICS

    Driving a 12v DC motor

    Just thought of something, wouldn't 12.7V make the collector base bias wrong?
  20. foTONICS

    Driving a 12v DC motor

    So I was trying to build an hbridge for a 12v dc motor using 2n3055's and was having issues so I decided to break it in pieces and do some testing. Attached is the circuit I tried and it doesn't do anything. Someone told me that I need a high side driver to get it to work. Am I right when I...
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