Главная » 2012 Январь 14 » Радиоежегодник №6 2011
15:02 Радиоежегодник №6 2011 | |
В данный сборник включены материалы рубрики "Design Ideas” англоязычного журнала разработчиков электроники "EDN” за 2011 год. ...Схематические идеи, внесенные инженерами электроники, для воплощения на практике… Издание ориентировано, прежде всего, на практическое использование специалистами и радиолюбителями. Переводы некоторых статей на русский язык можно найти в журналах «Радiосхема» и «Радиолоцман». СОДЕРЖАНИЕ: EDN design ideas 2011.January Reliable 555 timer doesn’t falsely trigger Test continuity with an LED Flash an LED from ac-mains power Transistors drive LEDs to light the path Use an optocoupler to make a simple low-dropout regulator Power an LED driver using off-the-shelf components Oscillator has voltage-controlled duty cycle Generate noisy sine waves with a sound card Decode a quadrature encoder in software EDN design ideas 2011.February Compute a histogram in an FPGA with one clock Control an LM317T with a PWM signal High-speed buffer comprises discrete transistors Limit inrush current in high-power applications Protect MOSFETs in heavy-duty inductive switched-mode circuits Reduce acoustic noise from capacitors Function generator has varibale frequency Power supply accepts wide input-voltage range Circuit lets you test capacitors EDN design ideas 2011.March Design provides single-port-to-dual-port SDRAM converter Zener diode protects FPGA inputs Bicolor LED indicates 10 states Relay driver switches two relays with one pin Anticipator circuit speeds signal settling to a final value Schmitt trigger provides toggle function Active multiplexing saves inputs Finely tune the hue of blue-light sources EDN design ideas 2011.April Low-component-count logic probe works with TTL and CMOS logic Circuit implements photovoltaic-module simulator Switch circuit controls lights Isolated PWM suits low frequencies Increase efficiency in embedded digital-I/O lines Modulating a reference allows maximum-value search for phase detection Offline supply drives LEDs Light an LED without wasting energy EDN design ideas 2011.May Circuit secures bootstrap operation under light load Build an accurate bipolar voltage reference Send MIDI signals over long distances MOSFET provides high power at low loss Waveform generator minimizes amplitude dependency Produce current from positive or negative high-voltage supplies Arrange LEDs as seven-segment displays Logic gates form high-impedance voltmeter Measure resistance and temperature with a sound card EDN design ideas 2011.June Potentiometer calibrates photodiode amplifier Drive 16 LEDs with one I/O line Circuit measures battery capacity Programmable driver targets piezoelectric actuators Circuit boosts voltage to piezoelectric transducers Protect power-LED strings from overcurrent Simple flasher operates off ac mains Use resistor noise to characterize a low-noise amplifier Build a UWB pulse generator on an FPGA Generate swept sine/cosine waveforms with two filters EDN design ideas 2011.July Compensate for four-wire sensor errors LED-current limiter accepts ac or dc Voltage inverter employs PWM Form positive pulses from negative pulses Positive edges trigger parabolic timebase generator Measure small currents without adding resistive insertion loss Power resistor varies in value Minimize noise in power-supply measurements EDN design ideas 2011.August Driver circuit lights architectural and interior LEDs Use op amps to make automatic-ORing power selector Charging time indicates capacitor value Circuit provides universal ac-input-voltage adapter Logic probe uses two comparators DAC fine-tunes reference output LEDs indicate sound level EDN design ideas 2011.September Polynomial rotation accelerates CRC calculations Simple circuit measures optocoupler's response time Circuit provides visual verification of IR pulses An LED's intrinsic capacitance works in a 650-mV LRC circuit Eight LEDs make a 100-division voltmeter Simple circuit controls the rate of voltage change across a capacitor or another load LED bar-graph display represents two digits EDN design ideas 2011.October Circuit controls inrush current in ac-operated power supplies Save 3 dB of output power using feedback to set the output impedance Optically isolated overcurrent detector works from ac mains Simple circuit helps to protect a vehicle-reverse camera Use a self-powered op amp to create a low-leakage rectifier Simple reverse-polarity-protection circuit has no voltage drop Series-LC-tank VCO breaks tuning-range records EDN design ideas 2011.November Circuit detects rapidly falling signals and rejects noise Hack into a stopwatch to make a phototimer Comparator directly controls power-MOSFET gate AGC circuit uses an analog multiplier Add extra output to a boost converter Fabricate a high-resolution sensor-to-USB interface Converters yield droop-free S/H circuit EDN design ideas 2011.December Inexpensive VFC features good linearity and dynamic range Mains-driven zero-crossing detector uses only a few high-voltage parts Build an op amp with three discrete transistors A diode ladder multiplies voltage under software control Charger extends lead-acid-battery life Circuit provides more accurate multiplication A few added components make a self-contained controller for 100A load Simple night-light uses a photoresistor to detect dusk Simple tester checks Christmas-tree lights Автор: С. Степанов Издательство: Самиздат Серия: Радиоежегодник Год издания: 2011 Страниц: 173 Формат: DJVU/rar Язык: англ Размер: 8.42 Mb Ссылки имеют свойства умирать. По всем вопросам в ПС. Скачать с Letitbit.net Скачать с ShareFlare.net Скачать с Turbobit.net | |
|
Всего комментариев: 0 | |