johnkok
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AP-D5830A 30A 800W 高出力DC-DCステップダウン定電圧定電流充電電源モジュール（ファン冷却付き）
US$36.99 US$55.99

Q: Hi, It is the first time for my device. I put 36volt dc into the device but nothing. What's append? Output zero.

尋ねた adelco に 2021-11-02 07:07:12

johnkok did you try to short-circuit the two pins on the on-off connector?

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LILYGO® TTGO T-Call V1.3 V1.4 ESP32 ワイヤレスモジュール GPRS アンテナ SIM カード SIM800L ボード
US$23.99 US$37.99

Q: Did anyone buy this and use it in Vietnam? if yes, which provider offers NB-IoT SIM cards? Thanks

尋ねた Elkaybay に 2021-10-02 02:44:30

johnkok just note that as far as I know the module does not support 3G-4G, only GPRS-GSM.

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EleksMaker®Mana3YYレーザー彫刻機用3軸ステッピングモータードライバーボードコントローラー
US$33.99 US$40.99

Q: Does LA03-500 laser work with this?.

尋ねた BG155733441 に 2021-03-31 01:49:49

johnkok I am not sure. You need a TTL-PWM input to control the laser beam. LA03-500 it seems that does not have.

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