20pcs DIY Photosensitive Induction Electronic Switch Module Optical Control DIY Production Training Kit

Description Board size 17 x 23mmThis kit needs the buyer to weld and install by himself It is suitable for beginners enthusiasts and students in welding and assembling practice The circuit is composed of photoresistor and triode emitter follower The voltage of the photoresistor is converted to the base electrode when the value of the resistance changes The voltage of the base electrode is transferred to the emitter to control the brightness of the emitter LED Package Included 20 x DIY Photosensitive Induction Electronic Switch Module Optical Control Kit