FEATURES General Description: The DB-917TT experimental box is mainly used for learning diodes, transistors working principle, and typical application circuit. Experimental box by the composition of the photodiode, transistor, 12V relays etc wiring K4 jack. In addition, additional experimental box without desoldering installation template can be  demolished. Course Covered: Direct input, Photodiode input, Phototransistor input, Direct output Lamp Output, Electric relay output 12V   SPECIFICATIONS Power supply : AC220V ± 10%, 50HZ, ≤ 100W Signal source : 12V Operating temperature : 0 to +50 ° C Storage Temperature : -20 ° C to +80 ° C Humidity : 40 ~ 90% RH. Size : 370mm × 220mm × 120mm Weight : 3KG Click for Details