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Description: A digital fi‘equeney meter designed with FPGA development software Q-~us 11 is introduced．The 1 Hz—l MHz input measured pulse signals of the digital ii‘equency meter can be used for measuring frequency，period，pulse width and duty ratio，etc．The test results stably display O71 3 seven—segment numeric tubes，and the measuring ranges may be switched over automatically．The measuring error is equal to or less than 0．1％．
Platform: |
Size: 192493 |
Author: 胥海勇 |
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Description: A digital fi‘equeney meter designed with FPGA development software Q-~us 11 is introduced．The 1 Hz—l MHz input measured pulse signals of the digital ii‘equency meter can be used for measuring frequency，period，pulse width and duty ratio，etc．The test results stably display O71 3 seven—segment numeric tubes，and the measuring ranges may be switched over automatically．The measuring error is equal to or less than 0．1％． -A digital fi equeney meter designed with FPGA development software Q-~ us 11 is introduced. The 1 Hz-l MHz input measured pulse signals of the digital ii equency meter can be used for measuring frequency, period, pulse width and duty ratio, etc. The test results stably display O71 3 seven-segment numeric tubes, and the measuring ranges may be switched over automatically. The measuring error is equal to or less than 0.1.
Platform: |
Size: 192512 |
Author: |
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Description: 七段数码管按键识别，按下1键显示1，按下2键显示2-Seven-Segment LED identification keys, press the 1 key to show the 1, press 2 to display 2
Platform: |
Size: 236544 |
Author: 蔡宇佳 |
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Description: 电子密码锁
功能如下:
l、按键接口的设计
包括：
1）键盘扫描电路
2）弹跳消除电路
3）键盘译码电路
4）按键存储电路
2、密码锁的控制电路设计
包括：
1）按键的数字输入、存储及清除
2）功能按键的功能设计
3）移位寄存器的设计与控制
4）密码清除、变更、存储、激活电锁电路
5）密码核对、解除电锁电路
3、输出七段显示电路的设计
包括：
1）数据选择电路
2）BCD对七段显示译码电路
3）七段显示扫描电路
密码锁功能说明：
1、 数据输入：每按一个数字键，就输入一个数值，并在显示器上的最右方显示出该数值，并将先前已经输入的数据依序左移一个数字位置。
2、数码清除：按下此键可清除前面所有的输入值，清除成为“0000”。
3、密码更改：按下此键时将日前的数字设定成新的密码。
4、激活电锁：按下此键可将密码锁上锁。
5、解除电锁：按下此键会检查输入的密码是否正确，密码正确即开锁。
-Electronic locks
l, key interface design
Include:
1) The keyboard scanning circuit
2) bounce elimination circuit
3) Keyboard decoding circuit
4) The button memory circuit
2, the lock control circuit design
Include:
1) Press the digital input, storage and removal
2) The functional design of function keys
3) Design and Control of the shift register
4) remove the password, change, storage, activate the electric lock circuit
5) The password check, the lifting power lock circuit
3, the output of seven-segment display circuit
Include:
1) data selection circuit
2) BCD seven segment display decoder circuit of
3) seven segment display scanning circuit
Password Lock Function:
1, the data entry: Each press a number key to enter a value, and in the far right on the display shows the number and order of input data previously left a number of locations.
2, Digital Clear: Press this key to clear all previous input values , clear
Platform: |
Size: 130048 |
Author: ldong1989 |
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Description: 在对8279的键盘显示接口分析的基础上,设计实现一位L ED七段十进制数码管显示驱动和键盘输入阵列电路.利用8279可实现对键盘显示的自动扫描,以减轻CPU负担.其显示稳定,程序简单,不会出现误动作. 本系统采用8031单片机与8279芯片的显示接口组成对L ED数码管应用系统的显示驱动电路. 具有可靠性高、价格低、使用方便等特点,适合数据显示的计算机应用系统使用-On the basis of the analysis on the 8279 keyboard interface, design and implementation of an L, ED, seven-segment decimal digital display driver and keyboard input array circuit. Use 8279 automatically scans the keyboard and display, in order to reduce the burden on the CPU. Display stable, the program will not malfunction. the 8031 microcontroller and 8279 display interface composition application system L, ED, digital tube display driver circuit with high reliability, low price, easy to use, suitable for data displaycomputer applications use
Platform: |
Size: 80896 |
Author: jiany |
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Description: 采用并行口实现数字0~9、A~F、L、U、P、n总共19个键盘
并将按键的结果用7段数码管显示出来。-Using parallel port Numbers 0 to 9, A ~ F, L, U, P, n A total of 19 keyboard
And the key results with seven segment digital tube display.
Platform: |
Size: 113664 |
Author: moweijie |
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Description: 并行口设计数字键盘实验
并行口实现数字0~9、A~F、L、U、P、n总共19个键盘，将按键的结果用七段数码管显示
-Parallel Port numeric keypad test parallel port for digital 0 ~ 9, A ~ F, L, U, P, n total of 19 keyboard, the keys of the results of seven-segment LED display
Platform: |
Size: 17408 |
Author: hexinghao |
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