This article shares the DIY detailed steps of the all-digital audio power amplifier circuit assembly, the required materials and the desktop speaker implementation functions, etc., using the digital power amplifier board circuit, switching power supply, display panel and line soldering, to the final assembly test assembly. In recent days, DIY has assembled a small all-digital desktop power amplifier. The small and exquisite appearance is put on the desktop for computer songs. The power amplifier features are as follows: 1. Appearance size: aluminum alloy profile housing 74.2mm & TImes; 89.6mm & TImes; 130mm 2. Output power: 2 & TImes; 3W (for pushing left and right 3W small speakers), 2 & TImes; 15W (can be used to push bookshelf speakers). (no radiator required) 3. Power supply mode: USB (2×3W group only), built-in battery 3.6V (2×3W group only), 220V AC power, all three modes can be independently powered, and the built-in battery can be charged when USB and 220V AC power are supplied. . 4. Operation mode: panel button + remote control. 5. Playback function: support U disk, SD card, external audio input, FM radio. 6. Play format: MP3. 7. Display: Two-color LCD display. 8. Voice: Support multi-national language, can display Chinese songs, lyrics. Incremental Encoder is commonly used, and Absolute Encoder is used if there are strict requirements on position and zero position. Servo system should be analyzed in detail, depending on the application situation. Commonly used incremental encoder for speed measurement, which can be used for infinite accumulation measurement; Absolute encoder is used for position measurement, and the position is unique (single or multiple turns). Finally, it depends on the application situation and the purpose and requirements to be realized. Incremental Linear Encoders,Linear Optical Encoder,Linear Position Encoder,Encoder Bearing Tester Yuheng Optics Co., Ltd.(Changchun) , https://www.yhencoder.com
