Keith Null

有次幫個frd upgrade 個工業吹風機，佢想install 個motor controller 可以調motor 大力同細力，上網用左個好simple 既solution based on 我地sutdio有既料試整左個由mosfet + potentioneter 10k，結果冇咩效果，後尾test個mosfet 就好似燒壞左，原因係大功率DC moter 會gen 個magnetic field 開同關果時會沖爆mosfet 個gate

using expo framework for creating android/ios app to read specific supported nfc card to retrieve data. Using the react-native nfc manager package, the same function to read nfc IOS wont able test the nfc reading using the expo dev

a eletric componets for connecting 2 different circuits which got different voltage

For Java generate QR code a html ready code for the template com.google.zxing.qrcode.QRCodeWriter generate the qr sizing issue code exmaple: String urlQrCodeBase64 = qrCodeService.generateQRCodePngBase64("context", 150); <img src=\"data:image/png;base64," + urlQrCodeBase64 + "\" style=\"width: 150px; height: 150px;\" /> butthe context leght is more the size will be shrink

After using expo local development build and install into android, after opening the application will show unable to connect to the local debug console with socket connection exception