How to learn AVR SCM

How to learn AVR SCM
http://www.siliconray.com/atmega128-mcu-starter-kits.html
Buy the AVR programming example book, and then download the PROTEUS software, building the lines, use the ICC AVR software programming, to read a book to learn good ah.
What kind of AVR tutorial? This is not the answer, if want to make sure a word, the proposal to see MaChao teachers write the AVR tutorial will do. Other tutorial is very much the same.
What kind of AVR development board? Now AVR development board is numberless as the sand, did not have a good, also not bad. I use of AVR development board is just a raises all the minimum port system board, using a well.
If you want to start to learn, that suggest the goal of the first put high some, namely the Atmega128 single-chip microcomputer chip choose AVR right, and the mastery, Atmega the eight series of single chip microcontroller even if mastered. Of course there are interested in learning to 16 of the single chip microcomputer AVR AtXmega or 32-bit AVR AVR32UC3 single chip microcomputer.

51 / AVR single-chip microcomputer with what good?

51 / AVR single-chip microcomputer with what good?
http://www.siliconray.com/arduino-pro-mini-with-atmega328p.html
I see taobao, at sixes and sevens, what minimum system ah, what download of the kind used these do not understand, want to buy a neat a piece of board good good study, please recommend, had better have followed the mark, the ultrasonic, wireless, remote control, infrared, human body detection, text display, steering gear control, some that all, thank you
The best answer the proposal with 06:55 51 series microcontroller, user huge, routines is rich, the example to learn range is very wide, and domestic STC series 51 SCM too fast, the same crystals, average speed can reach the original 8 to 10 times, and bring their own 8 and 10 AD, converting speed fast, a subtle can be completed all the way AD transform, serial communication baud rate I now work in 115200 is very normal. The most convenient is software can ?

AVR microcontroller simple problem

AVR microcontroller simple problem
http://www.siliconray.com/development-boards/avr.html
ADMUX
ADCSRA
See attached figure configuration
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ADMUX = (0 xc0 | adc_input); / / adc_input: difference channel x08 0 ~ 0 x1D / / 0 xc0: choose within 2.56 V reference voltage
ACSR = 0 x80; / / simulation comparator control and status register ACSR of ACD buy 1, so that the imitating comparator disabled
ADCSRA | = (1 < < ADSC); / / start AD transform
ADCSRA | = (1 < < ADIF); / / write 1 clear sign a

Below is a complete example of GCC
# include < avr/IO. H >
# include < avr/delay. H >
# include < avr/signal. H >
# include < avr/interrupt. H >
/ * macro INTERRUPT SIGNAL of usage with similar, SIGNAL difference lies in the execution of the trigger a global INTERRUPT cleared, other interrupts are banned INTERRUPT the execution of the global INTERRUPT trigger bit is set a, other interrupts can be nested hold another avr-libc offers two API used to buy a and reset global INTERRUPT triggered

A circuit diagram, LED low power consumption

A circuit diagram, LED low power consumption
http://www.siliconray.com/universal-toroid-transformer-for-tube-preamplifier.html
Low power consumption will be LED a circuit diagram four constant current source LED in series with the greatly reducing the waste of battery level. Circuit demonstrates how to counter to display with CMOS four binary digit of the technology.

GSM wireless intelligent monitoring design

GSM wireless intelligent monitoring design
http://www.siliconray.com/
1 introduction
Along with the rapid popularization of GSM network and mobile communication technology rapid development, new technology and new business development and application of the already mentioned very important position, using GSM network as a wireless intelligent monitoring system of information transmission platform is a very effective method.
This paper involves the intelligent monitoring module that is using GSM network of short news function and voice realize two-way data communication function, can be used for intelligent household monitoring, unattended equipment maintenance, remote information collection, industrial control equipment and long distance running state of the detection and control, etc.
2 intelligent surveillance system, overall design
The whole monitoring system by the GSM network, monitoring module and monitoring of the monitoring center or, system theory and as shown in figure 2.1.

Want to make low power radio transmitter and receiver

Want to make low power radio transmitter and receiver, let each master give directions, thank you!
http://www.siliconray.com/
This circuit is online, suggest an entry-level only do the transmitter, as long as a high frequency tube can be made into, choose ready-made FM radio receiver, about receiving distance in the 50 m or so.

For radio production-is a frequency can wireless received.

For radio production-is a frequency can wireless received.
If you want to make it clear principle, please reference "rf communications circuit", science press ChenBang-love
radio
Had better look "complex-variable function and Laplace transform, the signal and system" and "the analog electronic circuit of the book.
If just want to look at the circuit, natural, so or recommend you said above the first book, and there are each part of the detailed circuit diagram, detailed each transistor's parameters and to meet method.
There were very simple figure, such as block diagram.
If just close transmission, that used to build a tool called the spell circuit of the electronic world things (very old)... That it seems to have some simple version.

Aspirated very early smoke detection alarm system can be applied in of the cold?

Aspirated very early smoke detection alarm system can be applied in of the cold?
http://www.siliconray.com/development-tools.html
Its principle is: high sensitivity aspirated feeling smoke detectors, that is very early fire detection system is through the extremely high sensitivity of air pollution by monitoring equipment from detectors or area air samples from continuous analysis to determine whether one have smoke ingredients. This type of detector is a kind of turbidity plan than the traditional smoke detector sensitivity high hundreds of times.
Asd system pipe is usually installed in the ceiling, or upper, each tube in the appropriate drilling sampling interval has holes. Air pump or breathe in through the pipe and sampling machine hole continuously will air learned in the probe. Air samples of the smoke concentration and a group of calibration is critical in smoke. If air samples of the smoke concentration in advance of the calibration smoke more than ? critical value

The fire alarm system based on single chip design, want to use smoke sensor and infrared sensor + at89s52 devices do, to do physical, help choose the parts,

The subject isn't very good do smoke sensor is first react slowly second infrared sensor are generally linear signals, is only is to signal acquisition to slant a bit can all not make but also could be influenced by the interference of the sun I used to want to do but didn't do hope you can do well!
http://www.siliconray.com/development-tools.html
The fire alarm system based on single chip design, want to use smoke sensor and infrared sensor + at89s52 devices do, to do physical, help choose the parts,

In what wireless transmitting modules? Suitable for 51 single-chip microcomputer control, and is the transmission distance in 30 M or so, beyond the best

I have the following advice:
(1) NRF24L01 module
Advantages: easy to use, the price is cheap
Disadvantages: not stable, the transmission distance general (signal good time should be able to more than 30 m)
http://www.siliconray.com/
(2) CC2430 Zigbee device
Advantages: stability, mature, the transmission distance than the former
Faults: prices high, use a little more complex
Another point, it is worth noting, this device has built-in 51 controller, so that no additional 51 SCM.
(3) serial wifi module
Have SPI and UART two kinds
Advantages: very stable, the transmission distance great, application scope
Weakness: the price is high, the agreement complex
Serial wifi module can be directly by single-chip microcomputer control, common built-in hardware protocol stack
Note: the above information based on actual use all my experience

About wireless launch modules and microcomputer application

I am not electronic major, electronic aspects to understand a few, but recently do the project involves the relevant knowledge, will help everybody below the answer my question!!!!!!! Thank you, if the answer must be satisfied with additional points again.
http://www.siliconray.com/thumb-usb-stc-8051-mcu-programmer-1.html
1. About wireless launch module, launch module with A chip PT 2262, model FSK-2 A receiving modules with A chip PT 2294-M4, online to check PT 2262 and PT 2272 matched. Excuse me PT 2262 and PT 2294-M4 can matching work?
2. Launch module (with a chip PT 2262) with 6 root pin, respectively is VCC GND 10 11 12 13, excuse me the data sent can only rely on single chip microcomputer to control? According to the data or by different pin that represent the different data is sent? Hypothesis to transmit this string of 1101 data, do I have to use the data sent single-chip microcomputer control?
3. Receiving module (with

1, this not too clear, but still had better by pairing of to, not the pairing of together may use timing match very trouble, and there may be other trouble (excuse me, is 2249 receiving modules ah, as if not check 2294)
2, if you need data of single chip processing, then it 10 11 12 13 pin received IO mouth, in through the programming they want to transmit data, if data not processing, also can use relay to control, if you just think of some of the data can be completely to use four switch to control four pin.
3, actually can directly 10 ~ 13 four outlets by four led directly, if not to use single chip, that also can put them through the IO mouth access, in this another IO mouth meet diode light, this is involved problem four
4, if just to ?

Digital voltmeter design

A design topic,
Digital voltmeter design.
Second, design task
Digital voltmeter is used for measuring voltage meter, the subject that requires the application SCM, A/D converter and other parts digital voltage measurement instrument.
Three, the design requirements
http://www.siliconray.com/atmega128-mcu-standard-kit.html
1, basic requirements
(1) the MCS-51 series microcontroller as the core device, form a digital voltmeter.
(2) measuring voltage range is divided into two levels: DC 0 ~ 5 V and DC 0 ~ 51.2 V, minimum measuring voltage error 50 mV.
(3) using three tube voltage LED digital display, two integers, 1 decimal places.
(4) write detailed design report.
(5) give all circuits and the source program.
2, play a part
(1) add two function keys used to set up and down voltage limit.
(2) when measuring voltage over ? up and down

Using digital communication knowledge to design a distance measuring system

Safety obstacle avoidance mobile robot is one of the basic problem. http://www.siliconray.com/stc-8051-standard-kit.htmlThe obstacle and robots get is the distance between the safety of obstacle avoidance premise, ultrasonic sensor with its information processing simple, inexpensive and easy to implement hardware etc, and is widely used as range-finding sensors. The ultrasonic ranging system chooses the SensComp company produces the Polaroid 6500 series ultrasonic distance module and 600 series sensor, microprocessor using ATMEL company AT89C51. In this paper, this ultrasonic ranging system to carry on the detailed analysis and introduce.
1, ultrasonic sensors and metering distance principle

Ultrasonic frequency is higher than 20 KHz to wave of [1]. In order to use the ultrasonic as detection means, must produce super living wave and receive ultrasonic. Complete this function is the device