File:Plant board top.jpg
Plant_board_top.jpg (600 × 291 pixels, file size: 63 KB, MIME type: image/jpeg)
The board was a bit small for this project, but all fits. The whole thing uses the magic of the 4093 (a quad, dual input, Schmitt-trigger NAND port IC). It feeds the feelers (green pins) with a low current AC, then checks whether or not the voltage is high enough to trigger the next gate. Then a diode detector that converts the pulses to a nice DC level. This is available on the yellow pin for further processing. The last port of the 4093 is used to blink the LED.
Power is applied to red and blue, 4-5V is perfect, but even 15V should work! (The LED might die though!)
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 06:11, 19 September 2013 | | 600 × 291 (63 KB) | Glu (talk | contribs) | The board was a bit small for this project, but all fits. The whole thing uses the magic of the 4093 (a quad, dual input, Schmitt-trigger NAND port IC). It feeds the feelers (green pins) with a low current AC, then checks whether or not the voltage is hig |
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