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Series LED Resistor Calculator - Electrical Engineering & Electronics Tools
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Vintage Sharp ELSI 8002 Green LED and 12 similar items
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Pocket calculator Superlectron Model 8GPG Green LED 1975 - KuSeRa
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File:Vintage Sharp Electronic Pocket Elsi Mate Calculator, Model EL-500, Green Fluorescent, Made In Japan (14181747381).jpg - Wikimedia Commons
