Circuits & Schematics Microcontrollers Usage: clock - 4

31. The Witness camera. Part 3
    Circuits Microcontrollers Usage Security
    .. is detected. The RECORD LED fires when images are being recorded on the SD-card. The first time, you need to set the clock. Take the remote control and press the CLOCK key until the camera asks for the password. Press keys 1-2-3-4 in ...
    12-03-2010

32. Solar Mailbox project
    Circuits Solar Microcontrollers Usage
    .. 0=output TRISB = 0b00110011; // Option: PS: 000 // PSA: 0 assigned to Timer0 // T0SE: 0 faling edge // T0CS: 0 internal clock // INTEDG: 1 rising Edge (sunshine) // nRBPU: 1 pull-ups disable OPTION = 0b11000000; // Set the Port to off ...
    22-03-2010

33. AVR TV terminal
    Circuits Microcontrollers Usage Interfaces
    .. signal must be generated utterly on the dot. Program was created in assembler and compiled code is here . Microcontroller clock is on maximum frequency - 20 MHz. Frequency 22 MHz would be better, but for reproducibility I accepted 20 MHz. ...
    23-03-2010
34. AVR Phone Recorder & Telephony Platform. Part 1
    Circuits Microcontrollers Usage Telephone
    .. the battery backup system. The ATTiny45 runs with its internal calibrated oscillator at 8MHz, but the software sets the clock prescaler to divide it by four, so the core runs at 2MHz. Two voltage divider resistor networks scale the main ...
    21-04-2010
35. The AVR based USB Touchscreen Mouse
    Circuits Microcontrollers Usage Interfaces
    .. for a USB Mouse. The example is even configured for the same architecture that I was planning to use (target device, CPU clock, and fuse values), so I didn't need to change anything in the makefile. Although, I did want to use my Atmel ...
    05-05-2010
36. Temperature Recorder. Part 1
    Circuits Automation Measurement Microcontrollers Usage
    .. temperature recorder can be seen with the external thermistor plugged in. The connector on the end contains power, I 2 C clock and data and analogue input. The overall size of the complete unit is 40 mm long, 26 mm wide and 16 mm tall. In ...
    12-05-2010
37. I2C Bus Sniffer on AVR
    Circuits Microcontrollers Usage Interfaces
    .. monitor in my spare time. The I2C bus was developed by Philips in the 1980’ s. It is a serial bus, consisting of a clock and data line. The protocol specifies START and STOP conditions, the data format (8 bits, MSB first), and and ...
    20-05-2010
38. One I/O line drives shift register with strobe. Part 2 - How it works
    Circuits Microcontrollers Usage
    .. Mijanovic, Nedjeljko Lekic Part 1 - Schematic Let us look at the first shift register. The microcontroller drives CLOCK input directly. The same signal passes through the RC filter and drives DATA input D (Figure 5). The RC filter ...
    11-05-2013
39. ATtiny fusebit doctor (HVSP)
    Circuits Microcontrollers Usage Atmel Attiny11 Attiny12 Attiny13 Attiny15 Attiny25 Attiny45 Attiny85
    .. to further repair on SPI normal programmer. Do not use this option with Attiny11 or Attiny15 . Fusebits: internal 4 MHz clock not divided by 8. Will be good to select the “fast rising power” too. Update 3 May 2010 : If you ...
    26-05-2010
40. AVR Atmega Fusebit Doctor (HVPP)
    Circuits Microcontrollers Usage Atmel Atmega8 Atmega16 Atmega32 Atmega64 Attiny2313
    .. it, device for repairing dead Atmega family AVRs by writing wrong fusebits. Most common mistakes or problems are a wrong clock source (CKSEL fusebits), disabled SPI programming (SPIEN fuse) or disabled reset pin (RSTDISBL fuse). This ...
    02-06-2010

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