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This study was carried out to complement voide of seed /grain during planting with common feeding device using an electronic unit. The modified planter consist of two feeding system namely, the main feeding with cells/disc device and the complementary feeding with cone hole device operating by. This system calibrated under condition when a seed /grain for any reason is voided from the main feeding device, the other device automatically compensate it. To meet this goal, three sensors were conducted to two feeding systems. An electronic circuit designed at private sector that involve pic 16f877 connected with LM016LCD,  pot-hg resistor and ground located in box. Also, there IR sensors and electrical lever connected to electronic circuit that operates by 3V battery. A cylinder seed box IR and cone seed box IR were placed at point of seeds out conducted with electronic circuit to receive and record the seed number out from cylinder and cone box respectively. Guide-gear sensor is the third IR sensor that placed on the right side of the machine frame at the end in front of guide gear to sent signal to pic. The experiments were done under different speed travel , number of feeding revolution ratio and land wheel revolution. The results indicated that ; Using the complementary feeding device solve the problems of voide that decreased by about 0% compared with normal device. Also, The feeding system efficiency increased by about 1.2 times at 1.42 m/sec per reduction ratio of 0.49

Investigation an Electronic Device to Complemet the Common Planter Feeding Device