DS1307 RTC Module

The module based on DS1307, The DS1307 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an I²C, bidirectional bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 d ...

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ulibSD a library for use SD cards in SPI mode with uControllers.

ulibSD It’s a library for use SD cards in SPI mode with uControllers, entirely written in C. This library can work with SD cards and also has the possibility to emulate the behavior in a PC file (GNU/Linux) using the macro _M_IX86. It’s for debugging purposes. The data transfer is oriented to 512 byte size, remember this. Public methods ulibSD has four public methods: SD_Init: Initialization the SD card. SD ...

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Hacking a UART where there never was before

The Omron RS8 met several of our design requirements, small, battery operated, quiet and entirely wrist mounted. So no heavy base unit. With the initial attack vector expected to be the NFC interface the case was opened and warranty voided. Thankfully the PCB was not too complicated, although populated on both sides the dual layer design made circuit tracing easy. Working through the ICs on the top of the P ...

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Hacking home weather station transmitter

Recently I've found this piece of electronic on the dumpster, it was looking interesting - compact case with battery holder, LCD display, temperature and humidity sensor. It has also radio transmitter, but I'm not interested in it since I don't have the receiver station. I decided to bring it back to life.It seems that was previously immersed in water - whole PCB was covered in white stains, in addition rad ...

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Altera returns to its FPGA roots with Stratix 10

Altera has returned to its roots with its latest Stratix 10 FPGA family. The performance figures of this device are certainly impressive. It reminds me of the days when FPGAs were only ranked by their gate count process technology and clock speed. This was before suppliers felt they had to re-style FPGAs as configurable processors. Altera’s capabilities in FPGA architecture design can be seen in the new Str ...

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3W Stereo Audio Amplifier using TDA7266D

Tiny stereo audio amplifier board has been designed around SMD TDA7266D IC from ST. The TDA7266D is a dual bridge amplifier specially designed for Portable Audio, LCD TV/Monitor, PC Motherboard, and TV applications. This circuit provides high quality audio output of 3W approx. on each channel with standard audio signal input. The circuit works with 3.5V to 5V. Due to low supply input this amplifier is suita ...

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Comment: Can ARM dominate mobile GPUs too?

Samsung’s decision to use more ARM processor cores in its smartphones and tablets is not surprising. But these are not Cortex-A series processors they are Mali graphics processing units (GPUs). ARM rival Imagination has the GPU of choice for the mobile market. Apple, Samsung, Motorola, Nokia all use PowerVR graphic processors developed by Imagination. As a result Imagination is the leading supplier of GPU I ...

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Hot rods keep the die cool

Quad Flatpack No leads (QFN) packages offer at least one advantage over Ball Grid Array (BGA) packages: because the electrical connections are partly made via solder lands on the side of the component visual inspection of solder joints and repairing them is easier. Thermally enhancing a package for power applications can be done with a heat conducting pad underneath, but this makes visual inspection difficu ...

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Imec demoes full-colour OLEDs

Imec and Fujifilm have demonstrated full-colour OLEDs by using their jointly-developed photoresist technology for organic semiconductors, a technology that enables submicron patterning. This paves the way to producing high-resolution and large organic electroluminescent (EL) displays and establishing cost-competitive manufacturing methods. Organic EL displays can be made thin and flexible with excellent res ...

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LTC7813 – Low IQ, 60V Synchronous Boost+Buck Controller

Features Synchronous Boost and Buck Controllers When Cascaded, Allows VIN Above, Below, or Equal to Regulated VOUT of Up to 60V Wide Bias Input Voltage Range: 4.5V to 60V Output Remains in Regulation Through Input Dips (e.g. Cold Crank) Down to 2.2V Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE) Low EMI with Low Input and Output Ripple Fast Output Transient Response No External Bootstrap Diodes Required ...

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