Today we make a new project Fastest Finger with microcontroller PIC16F628 from this link. This simple circuit has five buttons and five LEDs. Four keys are linked with players, the fifth provides manual reset. After switching on or after reset (reset, manual or automatic), all the LED off and the system is ready. One of four players who were consigned to quickly see the button of its own LED light and all other keys are immediately blocked. The PCB file is provided in pdf format. The hex code is also included in the downloadable project file.
Fastest Finger with PIC16F628 – [Link]
Today we did an project amplifier with LM386. This amplifier is very easy to make and very compact, works with a single power source whose value can be between 4V and 12V.It is based on the use of a type LM386 amplifier, capable alone to issue a power of several hundreds of milliwatts to a load (HP) of 8 ohms, while consuming only a few mA at rest. Ideal for make a small portable battery powered amp.For an application in stereo, just to build this amp in two examplaires.
Amplifier With LM386 - [Link]
Dr.Petar Avramovski writes:
Several years after they appeared on the market, set as lights in my home. I noticed that quite often it burns faster electronics, lamps than themselves. I made a few holes on the body, for better cooling. Lamps with additional cooling, had more life. Then I started to combine.
Never dispose of faulty energy-saving bulbs – [Link]
ITead Studio kindly sent me a Colorduino for beta testing. The Colorduino was inspired by SeeedStudio’s Rainbowduino LED Driver Platform. Its form factor is very similar to that of the Rainbowduino, and the layout of the connectors was intentionally designed to mimic the latter. Both boards are based on the ATmega368 MCU, and are Arduino compatible. The principal difference between the platforms is that while the Rainbowduino is based on 3 MBI5168 constant current sink drivers and a M54564 darlington source driver, the Colorduino pairs the M54564 with a single DM163 constant current driver.
Also released an Arduino library that works with both the Colorduino and Iteadʼs Arduino RGB Matrix driver shield.
Tead Studio Colorduino – A Preview – [Link]
The circuit can be used to charge 12V lead acid batteries.
Pin 1 of the LM317 IC is the control pin which is used to control the charging voltage, Pin 2 is the output at which the charging voltage appears, Pin 3 is the input to which the regulated DC supply is given.
Battery Charger Circuit – [Link]
After you’ve developed a circuit, perhaps tested a prototype and have finally got the perfect design, you may wish to create a printed circuit board. There are some home-brew methods, but if you get to the point of wanting more than a few boards, it may be time to turn to a commercial fab house….
To help you find a good fab house, the tables below list some of the sources I have used that produce good boards as a reasonable price.
PCB Fabrication Sources – [Link]
An interesting product release from Sure Electronics – This module is an accurate pressure and temperature sensor which is based on the MS5561. Pressure and temperature values can be directly read via SPI or UART via an onboard PIC. This eliminates the need for complicated calculations.
The MS5561 can still be directly interfaced with if you do not want to use the onboard PIC. This is handy for obtaining calibration data or using your own MCU to perform calculations. [via]
Air Pressure Sensor Module – MS6651 – [Link]
Arduino Uno @ Technology Review… [via]
As electronic devices got more complicated in the past few decades, it became increasingly difficult and expensive to tinker with hardware. The 1970s garage engineers who built their own computers gave way to geeks who programmed their own software. But now the rise of open-source hardware is paving the way for a return of build-it-yourself electronics. Creators can start with devices such as the Arduino, an inexpensive control board that’s easy to program and can hook up to a wide variety of hardware. People can create projects that range from blinking light shows to more sophisticated efforts such as robotics. The Arduino started with designers in Italy, who license the boards to manufacturers and distributors that sell official versions for less than $50. The Arduino designers freely share the specifications for anyone to use, however, and third-party manufacturers all over the world offer versions of their own, sometimes optimized for specific purposes.
Arduino Uno @ Technology Review – [Link]