SPECIFICATIONS

Experiment equipment:

An Ard uino compatible motherboard Cat duino (not familiar with open source hardware can be understood as the Atmega328P microcontroller development board) and a mini USB cable;

1 4-digit digital tube display module;

4 male to female DuPont lines for connecting the control interface of the module and the Cat duino development board;

Experimental procedure:

1. Use 4 male to female DuPont lines 4-digit digital display moduleConnected to Cat duino, as shown in the following table and figure

2. Connect the Catduino with mini USB. If you are using the motherboard for the first time, its USB to serial driver can find the USB Drivers from the drivers in the Ard uino IDE directory.

3. Reopen the Ard uino IDE and click the Open button on the toolbar to open the NumberFlow routine in DigitalTube.

Select the serial port, board name, click the Burn button, you can burn. This routine can make 16 characters from 0~9, A, b, C, d, E, F, etc. flow from right to left.

The function of adjusting the gray scale of the digital tube is the set() function in the class TM1637, and the input parameter is 0~7. The larger the number, the higher the brightness.

TM1638

Weight:28 g
Color: as picture show
Size:75mmx48mm/2.95"x1.89"(inch) (approx)
The rated voltage: DC12V
Voltage range: DC7.0 V-13.6 V
The input power: 0.24 A
The rated speed: 9500 R.P.M
Temperature range:-10.. 70 ° C
Txpect life: 25 ° C L10 when expected life 50000 hours
Bearing structure: free maintenance dual ball bearings
Rotation direction: the wind from stents place eduction, facing the rotor counter-clockwise
The wiring way: + red-black signal: blue (blue line, the alarm line speed, it is necessary to pay attention to). Line about 20 cm long
The biggest air volume: 26.8 m? / h
The electric motor protection : overload protection, wrong level protection and stall lock current protection
Minimum wind pressure : 0.. 120 Pa
Noise index : 41.9 dB (A)
Material qualitative material: glass fiber reinforced plastic, PBT shell, PA blades
Function explain : electronic reversing the rotor dc fans, complete electronic directional control components

MAX7219 is a kind of integrated serial input/output common cathode display drive, it connects the microprocessor with eight digit seven segment digital LED display, also can connect the line graph display or 64 independent leds. It includes a piece of type B BCD coder, multiplexing scanning circuit, drive period of word, but also a 8 * 8 static RAM is used to store each data. Only an external registers used to set the period of current of each LED. A convenient four wire serial interface can join all general microprocessor. Each data can be addressed in the update does not need to rewrite all the display. MAX7219 also allows users to each data selection code or code. The device contains A 150 mu A low-power shutdown mode, analog and digital brightness control, A scan limit register allows the user to display 1-8 bits of data, there is also A let all LED detection mode. PCB four corners with copper screw fixation, which can effectively prevent short circuit accident happens! Four digital tube is 0.36 inch one common cathode digital tube This module is compatible with 5 V / 3.3 V microcontroller (51 / AVR STM32...) Wiring instructions (in order to provide the program, for example, you can pick any IO mouth, modify ports defined in the program) : The VCC - 5 v GND to GND DIN - P00 CS - P01 The CLK - P02 Note: 1. The VCC and GND don't pick up the, so as not to burn out the chip 2.51 SCM P0 port need to pull resistance, if your microcontroller could not pull resistance, can be cable to other ports Shipping list: 1. The MAX7219 digital tube display module 1 2. Straight row needles 5 p 3. The needle bending row 5 p 4. 1 MAX7219 English data sheet 5. 1 MAX7219 data manual in Chinese 6. 1 the principle diagram of the PDF format 7.51 1 single chip driver (a single module display program and cascade module program)