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  1. Codyhtml

    Plants wattering watcher

    I'll Double check the voltages and fix the LEDS and see what happens Thanks for all your help I have 4 AA Ni-cad batterys that should be able to give the current and voltage plus in the day time i have the solar panels it could draw on
  2. Codyhtml

    Plants wattering watcher

    ok pins 1-9 of the 3915 1| 3.8 2|.4MV(basically zero) 3|5.44 4|.4MV (same as 2) 5|.64 V 6|1.5 7|3 8|3 9|5.4 The Led's will light when not connected the the circuit i saw that i had connected the pot wrong i corrected that and the leds would light but my leds are just misc. ones from my drawer...
  3. Codyhtml

    Plants wattering watcher

    I didn't have a 2.5k trimpot so you said to use a 2k and a 510 ohm resistor I wasent guessing i must have been distracted or tired or something and i was thinking that the long wire was the cathode but i wasent thinking right at the moment
  4. Codyhtml

    Plants wattering watcher

    I don't think so except i didn't have a 510 ohm resistor and i made like a 500ohm or something so it should be fine and i think one other resistor i had to make my own but i came pretty close (by make my own i mean put two resistors in series) i found two mistakes that i thought i made and fixed...
  5. Codyhtml

    Plants wattering watcher

    Ok Hi i guess you forgot that you helped me modify this and i don't have a led i have a led bargraph display lol my batterys are meashring a little over 5v on pin 6 i get1.3V on pin 3 i get1.6V on pin 8 i get .64 V on pin 11 i get 2.3V My ics are i'm guessing you want all of it so here it is...
  6. Codyhtml

    Plants wattering watcher

    Ok I built this project
  7. Codyhtml

    Plants wattering watcher

    I do have to agree but for this year i'll make a second smaller compost pile and see if i can see a difference in them
  8. Codyhtml

    Plants wattering watcher

    good idea thanks
  9. Codyhtml

    Plants wattering watcher

    I got an idea what if I took a PVC pipe and put it in the corner of the compost pile and filled it with the same material as the other compost and put the probes into that. PVC is a great insulator and that might even help if any current went out of the bottom of the pipe and into the normal...
  10. Codyhtml

    Plants wattering watcher

    so i need to find out wil it ruin my compost pile and is there any way to keep it from ruining my compost pile (putting it in the corner something?)
  11. Codyhtml

    Plants wattering watcher

    that should be fine the main purpose of the solar cells is/was to extend the battery life. I can charge the ni-cads in a charger and the solar panels should keep them topped off for a while. Essentially making up for the extra draw of the bargraph/moving dot display. I guess i can experiment...
  12. Codyhtml

    Plants wattering watcher

    Ok i'm not sure if i know how to build a simple ni-cad charger from my solar panel can you help me with that? How do i make several sets of probes do i need to do anything special?
  13. Codyhtml

    Plants wattering watcher

    Ok thatks that is awsome thats the basics of what i need now how can i use two solar panels to charge 4 ni-cads such as what the solar yard lights do and can i have two or even three sets of probes to get a more acurate reading from the whole compost pile not just one spot? thatks for your help...
  14. Codyhtml

    Plants wattering watcher

    ok well I did my home work and this is what I got the ares in red I wanted to bring attention to because i figured i might have made a mistake there EDIT: I got thinking do i need to calibrate this and if i do how?
  15. Codyhtml

    Plants wattering watcher

    ok great my solar panel gives about 4v in bright sun could I modify the the charging circuit (witch i might have to to disable the off at day and the on at night anyway) to use 3 double a cells or if I need to I could probably use two lights so I have 2 panels and 4 batteries what would be the...
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