MCU circuit knowledge questions

MCU circuit knowledge questions
http://www.siliconray.com/catalogsearch/result/?q=mcu

1 above, is part of the trigger, the six reset input integration processing;
2, the middle part is to awaken timer, is mainly when the MPU into suspended animation, in a kind of 11 kinds of under the effect of awakening.
The main functions are reset circuit, the watchdog and monitoring!

What is MCU, what role?

What is MCU, what role?
http://www.siliconray.com/catalogsearch/result/?q=mcu
This is an interesting question, because who have not provided a who approved by all concept, that exactly what is single chip? Single-chip microcomputer and says monolithic micro controller, it is not a complete a logical function chips, but put a computer system integration to a chip. Summary of speak: a chip became a computer, in fact this concept is not approved, an example is DSP, ARM, why don't you call a single chip processor? Ha ha, there is no need to find clear concept to analyze what is a single-chip microcomputer, to understand it, literally get kind of SCM (single chip microcomputer 8051 is the best) to have a small project, you will know what is the microcontroller.
Now of course colleges and universities, as long as professional and electricity related, cannot leave the single-chip microcomputer course

what is MCU ？

Is the abbreviation of MCU Microcontroller Unit, is the micro controller.
http://www.siliconray.com/catalogsearch/result/?q=mcu
Also called SCM (Single Chip Microcomputer), it is to point to as the emergence of large scale integrated circuit and its development, will the computer's CPU, RAM, ROM, timing, and a variety of number I/O interface integration in a Chip, form the computer Chip level. According to the memory type MCU can be divided into MASK (masking) ROM, OTP (one-time programmable) ROM, FLASH ROM type etc. In recent years is the development trend of rising level of integration, including for limited digital signal processing function modules and analog circuit, and its application is also more and more widely.

Universal Toroid Transformer For Tube Preamplifier - Boards | Kits | Components | Modules | Tools

Universal Toroid Transformer For Tube Preamplifier - Boards Kits Components Modules Tools

Infrared pyroelectric processing chip is introduced and its BISS0001 circuit diagram

Infrared pyroelectric processing chip is introduced and its BISS0001 circuit diagram
http://www.siliconray.com/
BISS0001 is a has a high performance of sensor signal processing integrated circuit, it match with pyroelectric infrared sensors and a small external components constitute a passive pyroelectric infrared switch. It can automatically rapid opening all kinds of incandescent lamp, fluorescent lamp, a buzzer, automatic, electric fan, dryer and automatic wash one's hands the device such as, special apply to enterprises, hotels, shopping mall, warehouse and family of corridor, corridor and other sensitive areas, or used for the automatic light safety area, lighting and alarm system.

's point
* CMOS process
* mixed-signal
* have independent high input impedance operational amplifier
* internal two-way amplitude discrimination device can restrain the interference
* with time delay timer and blockade time timer
* adopts 16 feet DIP encapsulation
Tube feet figure

Tube ?

The gas tube used to avoid the antenna

The gas tube used to avoid the antenna
http://www.siliconray.com/boards-modules.html
Ceramic gas discharge tube of the sealed package, in the spark gap filling in the appropriate gas medium (argon or NaiQi), match with highly active electronic launch materials and discharge ignites institutions, is a special kind of metal ceramic structure of the gas discharge device.
In normal circumstances, discharge tube for its unique high impedance quartile (1000 M Ω) and low capacitance (or 2 pF) characteristics, as protection components access lines when the normal work of the line to almost nothing disadvantageous effects, and when the transient overvoltage into harmful, discharge tube was first breakdown discharge. The impedance fell rapidly, almost a short circuit state. Will the current through the wire and the relief is harmful to the earth, at the same time, the voltage limit in discharge tube's arc (about 20 V), eliminated harmful instantaneous overvoltage and over current, from

STC51 SCM experiment board connection problem............. Nasty!

STC51 SCM experiment board connection problem............. Nasty!
http://www.siliconray.com/thumb-usb-stc-8051-mcu-programmer-1.html
My laptop computer, win7 system, STC51 single-chip microcomputer integrated development board, today even for a long time, not even, vexed. Main condition is the USB cable to connect the development board, development board to electricity, but the computer can not display port, plug in USB line computer also computer end have no reaction, connect once before success, don't know why there has been even. The reason is the line, or the cause of development board, or the cause of the system? To help! Problems added:
Have, but also will burn in the program... If can appear port I knew how to do, the key is even port wasn't out...
STC microcontroller basic is through RS232 serial data transmission. If development board no 9 a needle (hole) interface, that your development board must be integrated with USB turn RS232 chip, so want to install the driver. -each development board is not the same. Suggest you ask to sell to you how the people development board make. (dizzy, 100 words restrictions

About stc51 single chip of the communist party of China, the dynamic display of digital Yang

About stc51 single chip of the communist party of China, the dynamic display of digital Yang
http://www.siliconray.com/instrument.html
I used to always USES is the total of the Yin, is to use 74 HC573 latches and 74 HC138 compiler to realize dynamic scanning,
The compiler data on 38, then, I now have the 8 bits of Yang digital tube, no matter how to adjust the data I digital tube is not to dynamic display, excuse me how modify realize, I appreciate!!!!!!!!!!!!!!!!!!!!!!!! Urgent for ~ ~ ~ ~
#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
uchar temp,aa,numdu,numwe;
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
uchar code tablewe[]={
0xfe,0xfd,0xfb,0xf7,0xef,0xdf};
//void delay(uint z);
void main()
{
numdu=0;
numwe=0;
aa=0;
TMOD=0x01;
TH0=(65536-5000)/256;
TL0=(65536-5000)%256;
EA=1;
ET0=1;
TR0=1;
while(1)
{
// delay(1000);
// temp=_crol_(temp,1);
// P1=temp;
  if(aa==1)
   {
    aa=0;
    numdu++;
    if(numdu==7)
     numdu=1;
    dula=1;
    P0=table[numdu];
    dula=0;
    wela=1;
    P0=tablewe[numwe];
    wela=0;
    numwe++;
    if(numwe==6)
     numwe=0;
   }
}
}
/*
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
  for(y=110;y>0;y--);
}*/

void timer0() interrupt 1
{
TH0=(65536-5000)/256;
TL0=(65536-5000)%256;
aa++;
}

General Toroid transformer for tube preamp

Universal Toroid Transformer For Tube Preamplifier
http://www.siliconray.com/universal-toroid-transformer-for-tube-preamplifier.html

Input: 110/220V 50/60Hz
Output:
180V-0-180V 50mA or custom specify
6.3V 2A (amplification tube filament)
5V 4A (for rectifier filament)

12 au7-6 v6 10 wx2 push-pull sound system tube amplifiers

12 au7-6 v6 10 wx2 push-pull sound system tube amplifiers
http://www.siliconray.com/12au7-6v6-10wx2-push-pull-hifi-tube-amplifier.html

Part List
Tubes：
6p6p*4
5Z2P*2
12AU7*4
Capacitors：
Capacitor *4
0.33uf VIMA capacitor*4
Electrolytic: 68U/450V*4
Electrolytic: 47U/450V*2
Axial Electrolytic: 100U/100V*2
33U/400V*2
Resistors：
2-3W resistor*33
10W270Ω*2
10W470Ω*2
Aluminum 25W/100Ω*2
Solid potentiometer*2
Potentiometer*1
Other accessories：
3-Band switch *1
LED*1
Cover for 9-foot tube socket*4
Fixed foot *4
Cabinet*1
Aluminum board*1
Aluminum knob*2
PCB*1
Power switch*1
Outlet and power cord
RCA*6
Connector *6
A pair of output transformer
250W power transformer
Output transformer cover*3
Big 8- foot Tube socket*6
Small 9-foot Tube socket*4
Output power：12W+12W
Output load:8Ω,4Ω
Input voltage: AC 110V/220V,
Input power: 230W

12 au7-EL34 25 wx2 push-pull sound system tube amplifiers

12au7-EL34 25wx2 push-pull hifi tube amplifier
http://www.siliconray.com/12au7-el34-25wx2-push-pull-hifi-tube-amplifier.html
Part List

Tubes：
EL34*4
5Z3P*2
12AU7*4
Capacitors：
Capacitor *4
0.33uf VIMA capacitor*4
Electrolytic: 68U/450V*4
Electrolytic: 47U/450V*2
Electrolytic: 100U/100V*2
33U/400V*2
Resistors：
2-3W resistor*33
Aluminum 25W270Ω*2
10W470Ω*2
Aluminum 25W/100Ω*2
Solid potentiometer*2
Potentiometer*1
Other accessories：
3-Band switch *1
LED*1
Cover for 9-foot tube socket*4
Cabinet*1
Aluminum board*1
Aluminum knob*2
PCB*1
Power switch*1
Outlet and power cord
RCA*6
Connector *6
A pair of output transformer
400W power transformer
Output transformer cover*3
Big 8- foot Tube socket*6
Small 9-foot Tube socket*4
Output power：30W+30W
Output load:8Ω,4Ω
Input voltage: AC 110V/220V,
Input power: 400W

Based on 51 SCM infrared highlighted.it

Use DS18B20Temperature control in-50 to 110
Precision error is not more than 0.1
Read directly LED digital display
To set up and down temperature alarm function
I bought a. Nice.
A, AT-12 A learning board main features:
1. Direct USB port the power supply can be through the computer USB port download program, convenient no serial notebook computer download and direct burn to write programs.
2. Direct download and write program online, don't need to purchase another single-chip microcomputer and writing implement, also can at any time convenient to burn to write programs to the single chip microcomputer program operation in check, learning, commissioning
Program of frequent and write save complex, changing pieces process.
3. A direct online simulation function, don't need another purchase expensive emulator. The chip in experiment, and directly online one step, commissioning at full speed.
4. The day AT-12 A learning board set experiment development board, A programming console, and write device, simulators four one, simple and efficiency.
5. Rich hardware resources

Single-chip microcomputer and motor driver module of ground, light coupling is doesn't work?

Had better not altogether..
http://www.siliconray.com/stm32-q-sys-summer-board-cc2500-wireless-module.html
Light coupling basically is an electrical isolation effects, but in the common in the circuit to still can rise to another role is light on both sides of the coupling can solve level transformation, such as 5 V system to the 3.3 V system, or vice versa. But the light of coupling use is used for electrical isolation, if use light coupling, and the total land, the light coupling meaningless, level conversion can use other methods.
Motor driver circuit, the start of the motor to the influence of the single chip microcomputer is very serious, the proposal does not altogether, send a single chip microcomputer starts commands in a suspended state after a period of time, or nop instructions, avoid voltage is not stable stage, started to work.

Based on SCM pressure measurement control system research and development

1 introduction
At present our country development coal production mechanization developing rapidly. The application of fully mechanized mining equipment, is to improve the efficiency, improve security measures. Open the chance of a influence factors to the ceiling is stents control is good or bad, therefore, the fully mechanized working face pressure monitoring and control for mine is very necessary. To do this, first need to work underground the hydraulic support's actual working condition monitoring, through to the inspection data processing, analysis, to assess its effect, and adopt corresponding measures to improve the probability, improve the production. This paper in order to monitor hydraulic supporting pressure for the research content, developed
http://www.siliconray.com/
 a set of pressure measurement based on single chip microcomputer control system.
2 pressure measurement control system function design
? pressure measurement
Pressure measurement control system structure as shown in figure 1 shows, it on the 80 C51 SCM as the core, including sensors, optical coupling, multi-channel data switch, LCD monitor, SRAM, EPROM, automatic reset circuit, RS-485 interface circuit and efficient power supply circuit, etc. The introduction of their respective respectively design characteristics.
3.1 sensor
The design of the sensor in front of the piston transmitting pressure hydraulic string wide range resonant sensor, sensor output amplitude for 5 v rectangle wave.
3.2 signal input circuit
(1) more road data switch (more road data selector) 74 HC151
74 HC 151 is 8 choose 1 data selector, it has eight data input D0-D7, A choose the end S, 3 data choice end A, B, C and two output terminal Y, W. When the 3 data choice end A, B, C from 000 to 111 between change, can choose not to

Tube (6 N8P) + MOSFET mixed high quality audio power amplifier

description
http://www.siliconray.com/tube-6n8p-mosfet-hybrid-hifi-audio-amplifier.html
This is a simple mixing tube (6 N8P / 6 SN7) + MOSFET design. The sound is great though circuit is very simple. 6 N8P troid form SRPP circuit drive MOSFET level the followers of the voltage. Only 0.08% of the total harmonic distortion @ 1 KHz 1 W 8 ohms load. This is a tool, provide the tubes in the solid voice price.

characteristics
N8P / 6-6 SN7 SRPP line voltage amplifier
Field effect transistor output voltage-a follower
Voice-pipe, solid price
6.3 V power supply of the exchange, 250 V dc obtai 15 ~ ± 20 V dc
-tension 0.