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Velleman Signal Generator Kit 1kHz Frequency – Electronix Express
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CIS Solar Cell, 4.7VDC Output (Max. 0.25W), 60mm x 60mm x 2mm – Electronix Express
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Amazon.com: Velleman EDU02 Solar Energy Experiment Kit : Toys & Games
Solar Power Study Kit | Solar Energy Kits for Students | HST
Velleman USB Experiment Interface Board - Kit Version – Electronix Express
Solar Energy Exploration Kit - Vernier
Solar Battery Charger with Sunlight Strength Meter and Built-in Light – Electronix Express
Solar Energy Experiment kit from Velleman | Elektor Magazine
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Velleman High-Q Kit KA02 Audio Shield For Arduino | eBay
Velleman MK103 SOUND-TO-LIGHT UNIT Build Kit Electronics Soldering | eBay