i have 5v brick plug , lead works - powers pi, 2.8" tft screen , few i2c boards. measure 4.8v on pins 2 , 4. good.
bought ubec power converter. cut micro usb cable expose cables , connected them ubec output. unloaded, ubec provides 5.2v. if plug lead pi no red led, solid green led , doesn't boot. however, 2.8" tft screen lights , measure 4.8v on pins 2 , 4.
need connect other usb wires +5v or ground? usb screen wrap need connected ground?
doing wrong?
bought ubec power converter. cut micro usb cable expose cables , connected them ubec output. unloaded, ubec provides 5.2v. if plug lead pi no red led, solid green led , doesn't boot. however, 2.8" tft screen lights , measure 4.8v on pins 2 , 4.
need connect other usb wires +5v or ground? usb screen wrap need connected ground?
doing wrong?
maybe convertor not able provide enough current (milliamps)?
raspberrypi
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