BOM-DAT/speaker-dat/speaker-dat.md
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# speaker-dat
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+- [[amplifier-audio-dat]] - [[8002-dat]] - [[speaker-dat]] - [[bt-audio-dat]]
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The terms 4-ohm and 8-ohm refer to the impedance of the speaker. Impedance is a measure of the resistance the speaker provides to the electrical current coming from the amplifier. It is measured in ohms (Ω) and directly impacts how the speaker interacts with an amplifier.
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Key Points about 4-Ohm and 8-Ohm Speakers:
Chip-cn-dat/jieli-dat/2026-02-11-16-11-50.png
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Chip-cn-dat/jieli-dat/jieli-dat.md
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- [[amplifier-audio-dat]]
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+## AC20CM
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+![](2026-02-11-16-11-50.png)
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+- [[amplifier-audio-dat]] - [[8002-dat]] - [[speaker-dat]] - [[bt-audio-dat]]
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+- [[MP3-dat]] - [[mp3-decoder-dat]] - [[microsd-dat]]
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+- 1、TF卡MP3解码板,不带TF卡,支持播放MP3音乐文件,目前测试16GTF卡支持,再大的还没试过,3.7锂电池或USB5V可供电。
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+- 2、板子右上角3组白色方框为3组轻触按键,中间一组为播放暂停键,上下2组短按为上下区键,上下2组长按为音量+-调节。
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+- 3、带2W单声道功放,5V供电时功放最大输出3W,建议搭配4欧3W插卡小音箱上的小喇叭,音质好,声音很大,如果觉得音量还不够大,请直接换4欧5瓦的喇叭,但要注意散热,要加散热片。
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+- 4、有顾客反映功放在播放音乐时,会有发热现象,功放芯片或功放管发热是正常的,只要不把功放开到大音量之后,短路喇叭的输出端(阻值0欧)是不会烧功放芯片的,可放心使用。
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+- 5、如不需要这款板子的功放,自己接功放,可按如下改装,把板子的功放芯片(8脚的芯片)去掉,然后从主控的第4脚和第6脚,(这两个脚是主控芯片左右声道输出)各串联一个104或224的电容去功放的输入端即可(电容起隔离作用,以防同一电源供电时烧前级主控芯片或后期的功放管)剩下一根线从负极去功放输入的公共端。
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+- 6、如要把这个板子改装用耳机听音乐的,把板子的功放芯片(8脚的芯片)去掉,然后从主控的第4脚和第6脚(这两个脚是主控芯片的左右声道输出)各串联一个104或224的电容去耳机的左右声道,剩下一根线从负极接去耳机的公共端。
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## AC410N
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AC410N: AC410N series is a Bluetooth audio chip series, with low power consumption and high performance microprocessor of 96KB SRAM, integrated 32-bit RISC CPU and rich peripheral circuits. The characteristics of this series are chips, which are launched for low power consumption applications, and the Bluetooth version is 2.0+EDR.
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Chip-dat/raspberry-pi-dat/RPI-SBC-dat/RPI-HDK-dat/RPI-zero-dat/RPI-zero-dat.md
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# RPI-zero-dat
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+## USB Extent
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+![](2026-02-11-16-16-28.png)
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+## info Zero 2W
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【Raspberry Pi Zero 2W Features】
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- Broadcom BCM2710A1, 1GHz quad-core 64-bit Arm Cortex-A53 CPU
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+## ref
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+- [[RPI-HDK-dat]] - [[RPI-SBC-dat]]
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Chip-dat/raspberry-pi-dat/RPI-SBC-dat/RPI-SBC-dat.md
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- [[RPI-HDK-dat]]
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-- [[RPI3-dat]] - [[RPI4-dat]] - [[RPI-zero-dat]] - [[RPI-zero-w-dat]] - [[RPI-zero-2w-dat]]
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+- [[RPI3-dat]] - [[RPI4-dat]]
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+- [[RPI-zero-dat]] - [[RPI-zero-w-dat]] - [[RPI-zero-2w-dat]]
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- official documentation - https://www.raspberrypi.com/documentation/
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Tech-dat/amplifier-dat/amplifier-audio-dat/amplifier-audio-dat.md
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- [[amplifier-dat]] - [[amplifier-audio-dat]]
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+- [[amplifier-audio-dat]] - [[8002-dat]] - [[speaker-dat]] - [[bt-audio-dat]]
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- [[signal-dat]] - [[signal-differential-dat]]
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- [[I2S-dat]]
board-series-dat/board-series-dat.md
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+- [[board-3rd-dat]]
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+- [[RPI-SBC-dat]]
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## ESP32
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- [[esp-relay-board-dat]] - [[ESP-DAT]]
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- [[RMP-driver-dat]] - [[led-rgb-panel-dat]]
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## LGT8F328
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[[LGT8F328-DAT]] - [[DAR1056-DAT]] - [[CIC1053-dat]] - [[NWL1097-dat]]
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chip-unsort-dat/8002-dat/8002-dat.md
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# 8002-dat
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+- [[amplifier-audio-dat]] - [[8002-dat]] - [[speaker-dat]] - [[bt-audio-dat]]
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2W 音频功放 IC
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8002A 是适用于便携电子产品的音频功率放大器。5V 电压时,最大驱动功率为 1.5W(8Ω负载)和 2.0W(4Ω负载)。8002A 的应用电路简单,只需要极少数外围器件。
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通过配置外围电阻可以调整 放大器的电压增益,方便应用。
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+![](2026-02-11-16-09-02.png)
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+## ref
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