SED-300SLY-B — Automatic Seed Counter
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SED-300SLY-B Automatic Seed Counter. Microcomputer-controlled (AT89S52) bench instrument for counting grains of rice, wheat, sorghum, corn, vegetable seeds, and similar agricultural samples. Electromagnetic vibratory fee
Funcionamiento
The instrument uses an electromagnetic vibrator to lift seeds along a helical trough on the sample plate. Seeds fall one-by-one through a photoelectric gate; each interruption generates a pulse that is amplified, shaped, and sent to the AT89S52 microcontroller. The controller counts via 74LS138 decoder and 74LS164 shift register, displaying the count on LED tubes. When the preset count is reached, the microcontroller cuts power to the vibrator and stops feeding. A membrane keypad provides count setting, zero, count start, and speed adjustment.