The MT8870 DTMF Audio/Speech Decoding Telephone Module is commonly used to control robots with a mobile phone, it is also used in different kinds of home automation projects where mobile dial pad input is required.
This is a mini LCD Digital Thermometer for Fridge Freezer, Insert Size 46mm x 26.6mm, Cable Length 1m (Black or White Color) If you open the battery cover to put in two LR44 batteries correctly, pay attention to the polarity.
The TIP32C is a base island technology NPN power transistor in TO-220 plastic package with better performances than the industry standard TIP32C that make this device suitable for audio, power linear and switching applications. The PNP type is TIP31C.
The VS1053 is a versatile MP3 decoder chip belonging to VLSI Solution's extensive slave audio processor family. Its capable of recording in three different audio formats, from lossless 16-bit PCM to highly compressed.
The 2SD882, 2SD-882, 882 is a NPN transistor manufactured by using planar technology resulting in rugged high performance devices. The complementary PNP type is 2SB772.