Circuits & Schematics Microcontrollers Usage: clock - 11

101. Hex-Switch Decoder Uses Weighted-Capacitor Network to Reduce I/O Pin Count
     Circuits Microcontrollers Usage Arduino Texas Instruments CD40106B
     .. inverter. This negative-going edge is used as an interrupt to the processor. The Arduino Uno, operating with a 16-MHz clock, is programmed to use Timer0 to set up the PWM output OCRA at 244 Hz with the pulse-width set to 224/255 ...
     12-10-2017

102. Hybrid PWM/R2R DAC improves on both
     Circuits Microcontrollers Usage Atmel ATmega328
     .. resolution. Alternatively, you can take those three bits from the top of the original PWM duty-cycle value, multiplying its clock rate by eight. You still get the 8:1 ripple reduction, but the increased clock rate pushes PWM noise further ...
     12-12-2017

103. Two wires control SPI high-speed ADC
     Circuits Interfaces Microcontrollers Usage Texas Instruments ADS7816
     .. plus ground, the host controller can address the target device and exchange data, whereas SPI requires three wires data, clock, and chip-selection plus ground. Multiple SPI-target devices can share data and clock lines, but each device ...
     22-02-2018
104. RC lowpass filter expands microcomputer's output port
     Circuits Microcontrollers Usage
     .. time constant, a zero shifts into the register. If the low state is short, then a one shifts into the register. The clock and data signals thus combine into one signal. A lowpass filter separates the clock and data signals (Figure ...
     19-03-2018
105. Tiny microcontroller hosts dual DC/DC-boost converters
     Circuits Supply Microcontrollers Usage Atmel ATtiny13
     .. microcontroller are in C and use the open-source AVR GCC compiler. The AVR ATtiny13 microcontroller operates at an internal clock frequency of 9.6 MHz without an internal-clock-frequency divider, so the PWM frequency is 9.6 MHz/256 = 37.5 ...
     15-02-2019
106. A circuit to use PIC peripheral outputs simultaneously
     Circuits Interfaces Microcontrollers Usage ON Semiconductor 2N7000 BSS138
     .. circuit was developed for a portable instrument using a 28-pin PIC MCU from Microchip Technology running an RTC (real time clock), EEPROM, and COG (chip on glass) LCD on the I 2 C bus, and a digital pot and microSD card on the SPI bus. The ...
     20-05-2019
107. Simple Technique Drives Multiple LEDs From One Processor Pin
     Circuits Microcontrollers Usage Texas Instruments CD74HC74
     .. networks to distinguish between them. The design described here is much simpler. The microprocessor pin is connected to the clock of a multiple-output sequential counter (Figure 1). In its simplest form, this state machine consists of two D ...
     19-05-2021
108. TinyCalibrator - OSC Calibrator and High-Voltage Fuse Resetter
     Circuits Microcontrollers Usage Microchip ATtiny10 Attiny13 ATtiny24 ATtiny25 ATtiny44 ATtiny45 ATtiny84 ATtiny85
     .. the 8-pin ATtinys only have a few GPIO pins available, they are usually operated without an external clock. The internal oscillator does a good job in most applications, but when it comes to precise timing, its 10% ...
     04-08-2021
109. TinyCharger - Single Cell Li-Ion Battery Charger with Monitoring
     Circuits Supply Microcontrollers Usage Microchip ATtiny10 Attiny13 ATtiny24 ATtiny25 ATtiny44 ATtiny45 ATtiny84 ATtiny85
     .. (No bootloader). Go to Tools and choose the following board options: Chip: ATtiny25 or 45 or 85 (depending on your chip) Clock: 8 MHz (internal) Millis/Micros: disabled B.O.D.Level: B.O.D. enabled (2.7 V) Leave the rest at the default ...
     19-08-2021
110. DIY Infrared Thermometer Pen
     Circuits Measurement Printed Circuit Boards (PCB) Microcontrollers Usage Atmel ATmega328P
     .. earlier, the schematic takes inspiration from the Arduino Nano for the Atmega328P circuit including its power circuits and clock choices (Figure 3). For convenience, I took a crystal generating a lower frequency, as it would enhance batter ...
     13-09-2021

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