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Tuesday, September 8, 2009

Humidity Soil Test

This indicator is called a series of soil moisture because this tool can be used to determine water content in soil or soil moisture. How to use this tool is very simple, namely: probe inserted in the soil near the plant that will be reviewed. LED will flash if the humidity does not work enough and if the humidity is less. Probe can be made from copper wire that dikelupas skins, probe length of approximately 100-150mm. LED should be inverted installation.
Components needed:
  1. R 1 = 100ohm
  2. R 2 = 10Kohm
  3. R 3 = 100Kohm
  4. R 4 = 1Kohm
  5. R 5 = 100Kohm
  6. R 6 = 39ohm
  7. Rv = 10K
  8. Tr 1 = BC548
  9. Tr 2 = BC558
  10. LED

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