Digital potential meter search

 10KΩ

X9C103S 115NTD

X9C103S 50NTD 10KΩ

X9C103S、10KΩ、數位電位器、數位可變電阻器

（1）3V~5V寬電壓供電。

（2）10K 電位器、每級100Ω、共100級。

（3）數字電位器VL和VH端口分別對應滑動變阻器的低端和高端，允許輸入電壓範圍-5V到+5V。


100K KΩ

you can also find MCP42100 200NTD

MCP42100 100K雙路數位電位器，寬供電電壓（DC 2.7V-5.5V），相容目前絕大部分微控制器的3.3V或5V供電，帶有兩路可獨立工作的數位電位器POT0和POT1，256級電阻抽頭。


【DIY_LAB#2162A】X9C104S數位電位器模組 70NTD




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Heltec ESP32+OLED+Lora, hardware testing

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micro SD card for ESP32, on lolin32 with OLED and heltec 32 lora oled

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I have purchased 2 micro SD card holder for my esp project. First I would like to test with heltec esp32 lora oled module. this module uses: sck=05 MISO=19 MOSI=27 SS(lora)=18, then I assigned 21 for sd SS and there is a lib in esp32-arduino, which use SS default at 5 I took the example and use SD.begin(21), but I alway get the error: entry 0x40078a9c Card Mount Failed But I do saw once that it read out the sd card type and volume. Not sure it's the issue of lora sd card swithing, or it just can't work. The other esp32 card I have is an wemos esp32 oled, it did not leave me too much pins, I need to find out how to connect sd to it. But I have wemos D1 mini esp8266 on hand, and connect it as:  * The WeMos Micro SD Shield uses:  * D5, D6, D7, D8, 3V3 and G  *  * The shield uses SPI bus pins:  * D5 = CLK  * D6 = MISO  * D7 = MOSI  * D8 = CS It's not working with the example in the arduino IDE 1.8.5, which m...
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AIS0. understanding AIS NMEA 0183: How it's coded

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