MAS830L is a 3 1/2 digit digital multimeter produced by Shenzhen Huayi MASTECH. The instrument has a 15mm high liquid crystal display with clear readings. The whole machine circuit design is based on large-scale integrated circuit double integration A/D converter as the core, and is equipped with overload protection circuit, making it a small and excellent tool instrument.
This is a digital thermostat user manual. The model number is CT-7011. The main function is to set the temperature value and support heating and cooling modes.
SM4558 is a dual-channel operational amplifier that includes two independent, high-gain, internally frequency-compensated dual operational amplifiers. It is suitable for dual-supply mode operation and can also be used in a wide range of single-supply applications. It can be used as an active filter, compensation amplifier, audio preamplifier, equalizer amplifier and various linear amplifiers in electronic instruments and meters.
