Circuits & Schematics Microcontrollers Usage: clock - 10

91. 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

92. 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

93. 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
94. 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
95. The Witness camera. Part 2
    Circuits Security Microcontrollers Usage
    .. does a good work at simplifying hardware access. For small applications, it’s a time saver. Do you need a real time clock? Just tell the compiler, and he will do the hard work of making timer interrupt code specific to the AVR ...
    04-03-2010
96. MICRO - DICE
    Circuits Microcontrollers Usage Games
    .. to 0V or +6Vvia the 10K resistor you can select fast roll or slow roll. This circuit uses the PIC 16F88's internal clock to eliminate the need for external components. The Master Clear (pin 4) of the PIC is taken high through the ...
    01-03-2010
97. The Witness camera. Part 1
    Circuits Security Microcontrollers Usage
    .. mode. The recorder controls the camera driver (another software module) in order to get the JPEG byte stream. The real-time clock is an hardware feature of the AVR controller, and the recorder uses it both for time-stamping the JPEG files ...
    25-02-2010
98. Four Channel PWM Controller. Part 1
    Circuits Microcontrollers Usage
    .. effects. To prevent this, the ‘Fast PWM’ mode of timer operation within the ATMega32 was chosen, with no clock prescaling, and a clock frequency of 8MHz. This results in a final PWM frequency of 31.25kHz, well above human ...
    01-02-2010
99. XXI Century Sundial - Now for Arduino also
    Circuits Domestic Laser MCU Open-Source Platforms Microcontrollers Usage Arduino
    .. necessary to drive it, the servo. The power supply comes from a 5Volt wall adapter. The micro controller runs a real time clock. Time is converted into minutes from 1:00 hours and converted in PWM pulse which is suitable to drive an RC ...
    10-06-2009
100. Digital Capacitance Meter
     Circuits Measurement Microcontrollers Usage
     .. charge and then start timer. It will cause a measurement error. This can be ignored on the AVR because it requires only one clock cycle for that sequence. Any other microcontroller may rquire to consider this problem. * Leakage current on ...
     25-05-2009

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