Mobile Phone LCD Screen Quality Control Expert

assembling an arduino nano / lcd projects platform

by:Kimeery     2020-04-09
\"Arduino Nano/1.
The 8 \"tft LCD project platform\" consists of a 3D printed housing that packs a custom designed PCB with Arduino Nano, a 1 installed on it.
8 \"tft LCD with SD card reader and three buttons exposed to the front of the case.
This Instructure describes the build of this toolkit and covers some aspects of the software that can be developed for the platform.
The kit is for those who have considered or are working on an Arduino project that can benefit from a compact and flexible package that provides small LCD, user input functionality, an SD card reader, and access the Arduino\'s pins (of course).
It can also serve as a platform for the new Arduino user to experiment with LCD display and SD functions.
The PCB is designed so that the head can be used to access all pins of the Arduino Nano used for jumpers.
Alternatively, the lead can be directly connected using the welding point of the joint.
The housing is designed to allow the six pin heads through the housing, or the gaps in that head can be used for ribbon cables.
There is also a port for the power connector.
Sketch available (
Presented later by this structure)
This demonstrates the use of tft LCD, SD card reader, three buttons connected to a single analog pin, and the temperature sensor that comes with the kit in this example (
And explain the general function of the shell).
This item can be purchased on eBay (UK)
As a complete suite including the case.
Or, electronic parts can be less.
Find them by searching for \"Arduino Nano/1.
8 \"tft LCD project case \".
The case can be printed in Thingiverse.
If you choose not to purchase an electronic part through the above kit, you can search for each part using the following terms: ITEM---
Search terms for items purchased from the eBayNOTESCut header bar (10)
Divided into four sections, 15 pins per segment.
It is easy to cut these straps into the right size using a small cutter.
Just place the claw of the wire clamp on the pin to be cut (e. g.
16 stitches from the end in this case)and squeeze.
The cut should be beautiful, even if it moves along the cavity of the mounting pin.
Carefully weld the four headlines from the top of the PCB to the front (
Label on side).
Make sure that the title strip is flush with the PCB and that the Nano strip will fit the two inside (see image).
Check again if all contacts have been welded clean and tidy as the display module will cover these welding points once installed! ! !
It is a good thing to do continuity testing with a Volt ohmmeter.
If you plan to use the 5v power plug (3)
Then there are two pairs of lines (not provided)
It should be welded to the front of the circuit board at this time, because once the welding point of the power plug is installed, it will also be covered by the LCD.
Note that the power plug can actually be installed after the event, but ideally it will be installed now.
Install three-pin jumper (6)
LCD power options.
There are jumpers on the PWM side by default, but if you need each PWM pin, then you can drive the backlight from the 5v power supply (
No brightness control though). The TFT LCD (2)
The module should cover the metal underside of the SD card slot with tape.
Don\'t delete this!
If the electrician tape is lost, then it should be replaced before proceeding, because the contact between the pin passing through the PCB and the metal SD card slot is not good!
Installation of LCD (2)
And three buttons (5)
From the back of the PCB of the title.
Make sure these items are installed flush with the board and the buttons are perpendicular to the PCB surface.
The bending on the button contact should be oriented in the long direction relative to the pcb length size (see image).
It is important that these buttons are installed at the same height in order to stand out evenly from the housing!
Finally, from the other side of the board of the LCD and buttons, four 10k resistors should be installed.
There will be more information about this later, but these Resistors create a voltage divider with three legs, along with the buttons, allowing one input on the Nano to be used for three buttons.
The PCB can now be inserted into the front of the 3D printing chassis (13)
The two wires of the power socket are exposed and welded to the socket through the power socket hole (
If you are using the above socket).
If you plan to use six pin heads (7)
To expose the pin to the outside of the shell, it should now be installed (
A little epoxy is fine).
When viewed from the outside of the housing, the leftmost pin of the joint can be bent down and welded to the PCB ground connector.
Four Screws can now be used to connect the back of the case (14).
Post on the back of the case (12)
The PCB should be firmly pressed in front of the box.
Reset Button extender (15)
It can be used to reset the Nano more easily, although there is a disadvantage that once all the pins of the Nano are assembled, an unexpected reset can be obtained through two titles.
Note, however, that some pins are used for various functions!
Pins that can be obtained without attention are D2, D3, d4 and D7, as well as A1 to a7 pins.
Serial port pins, Rx/Rx, and D1/Tx are also available.
If you use a jumper backlight to use a constant 5v lighting instead of a variable PWM lighting from pin d3, you can use f5.
Pins D4 and D12 can also be used, but only if the SD card function is sacrificed.
Our demo, using DHT-
The temperature and humidity sensor requires only one input.
As shown in the figure, I used half a miniature breadboard to make DHT-
11 so be able to install it in the box.
The data line of the sensor extends to D3, and the power cord extends to the 5v and ground pins on the exposed head.
Similarly, the jumper can extend from the above three pins to the title that exposes things to the world outside the shell.
The demo sketch shows the use of tft LCD, SD card reader, three buttons connected to a single analog pin, and for the purposes of this example the kit comes with a temperature sensor (
And explain the general function of the shell).
The program displays a menu that allows the selection of four features: Note that this is a very large sketch that consumes 97% of the memory of the Nano.
This is probably (
At least part)
However, due to the coding techniques that can be improved, more memory can be obtained if the boot loader is removed from the Nano through the Nano\'s programming and then through the ICSP pins exposed by the shell.
This is a very advanced topic, but it can go back to 2 k.
Please look at the mouse-
In \"comments on screen shots for each of the following code segments\", a brief overview of the EEProm memory, SD card, TFT display, buttons, and DHT-
11 temperature sensor.
Please see the \"mouse hover\" comment above.
Please see the \"mouse hover\" comment above.
You can find the Adafruit page that shows the graphics library here.
PDF references for the library can be found here.
Please see the \"mouse hover\" comment above.
Please see the \"mouse hover\" comment above.
Please see the \"mouse hover\" comment above.
Each electronic part of this kit can be found from eBay and can be found using the search terms on the first page of this manual.
The 3D printable case of the kit can be downloaded from Thingiverse.
Printed circuit board (PCB)
Complete Kit on EBay, including PCB and housing, and all kits except the Housing (
Suppose you print it yourself).
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