BG392305639
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515 нм 35 мВт модуль лазерного диода с зеленым лазером генератор для лазерного уровня маркера инструментальной линии позиционирования
US$10.99 US$13.99

Q: price just almost doubled?? last week it was still 5.4$... wth..?!

Задавает ideasinaction на 2021-06-08 18:56:39

BG392305639 The price S.R.24.57 has not doubled, but I do not recommend buying it because it needs to buy a cooler as well as a lens

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GT-38 Беспроводной MCU Серийный модуль SI4438/4463 1200 метров Прием UART Интерфейс Беспроводной связи
US$9.99 US$11.99

Q: How does this differ from the HC-12? Which is the better of the two?

Задавает 576924 на 2021-06-16 10:29:27

BG392305639 The HC-12 is a half-duplex wireless serial communication module with 100 channels in the 433.4-473.0 MHz range that is capable of transmitting up to 1 km The GT-38 is a half-duplex wireless serial communication module with 256 channels in the : 433-458.5 MHz range that is capable of transmitting up to 1.2 km

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