New answers tagged

2

Normally such LCDs are custom designed, mass produced displays especially for this calculator product. Thus it is very unlikely to find a datasheet or even a meaningful part number for it. Most likely the pins on the LCD are directly connected to the corresponding fields on the LCD. In an LCD you have liquid crystals between two electrodes, which change ...


1

In theory, maybe yes, in practice it will be hard job. Some things you need to find out: Find the exact model of the LCD Find its datasheet I see an enormous amount of pins (especially the blue ones), so you need (a lot of) multiplexers or shift registers. Speed of the Arduino, is it enough to drive this LCD? You have to solder this to test.


0

Sorry for the Late reply, I had the same issue. You cant have anything connected to pin 15 or 2 during flash


0

You can try int ledPin=13 instead of led_builtin . Led builtin connected 13 pin. Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO it is attached to digital pin 13 . Try this one. #include "Nextion.h" int ledPin = 13; NexDSButton bt0 = NexDSButton(0, 1, "bt0"); uint32_t dual_state=0; void setup(){ nexInit(); pinMode(ledPin, ...


0

Start with the Liquid Crystal, HelloWorld, Example. Find out if it's your pin configuration or pot/no pot issue, or if you have a doofed LCD. Some LCD 1602 have an on board pot, so make sure that's not there too. Process of elimination.


3

A brush DC electric motor and many other similar devices will produce random noise as well as uneven power demands and should be powered independently of logic circuits such as processors and LCDs. It is very difficult to mediate noise sources and almost always better to remove them from where they are causing harm or unexpected results. It is also ...


0

The Arduino core for Nano 33 BLE is based on Mbed and can be used in Mbed as library. To achieve this, the Arduino API classes in this core are put in a namespace arduino::. This causes problems for libraries which include individual includes of Arduino API historically copied into cores for different MCU architecture platforms. The Arduino.h file includes ...


2

The problem is with the 2 pins on the very right pf the LCD display, those that are marked with LED. On this simulated LCD board the background LEDs pins are directly accessable from the outside pins, so the LED is connected directly to these pins. Every LED needs a current limiting resistor, or it will be fried by the excessive current. Add a resistor of at ...


0

"LCD is supplied more than required current". That's not usually a thing. Most devices draw as much current as they need, no more, assuming you feed them the correct voltage. If you give them higher than the specified voltage, that pushes too much current through for the level of resistance they offer. So as long as you feed them a regulated supply at their ...


0

I have seen this behavior on esp chips as well. This happens when you've uploaded a program that utilizes the processor very heavily or a blank program. I've gotten it to upload by unplugging and re-plugging, trying to time it correct so that it's just booting up while the programming begins. Just keep trying this and eventually it should get through.


1

The “commands” provided by the vendor are not code meant to be copied as-is. They are pseudocode. If you need to know the real difference between “write command” and “write data”, you have to look at the datasheet of the interface chip. See for example the ILI9481. On pages 28–29 you can see a data transfer mode compatible with SPI (type C interface, option ...


Top 50 recent answers are included