Mai Jingtu c22 amplifier circuit diagram Longkou Libo Insulating Material Co.,Ltd. , https://www.liboinsulation.com
Single chip microcomputer STM32L151CCU6 Mobile phone crystal 3.2*2.5mm 3225 26M (26.000MHZ) 7.5PF 10PPM 20PPM 30PPM inductance SMD aluminum electrolytic capacitor 