推荐一个硬件参数计算、选型的网址

yw0238

推荐一个硬件参数计算、选型的网址www。daycounter。com/Calculators
既有电阻、电容、电感串并联计算，也有NTC热敏电阻校准、缓冲电路设计等，祥见下文：
Passive Component Properties
Air Core Inductor Coil Inductance Calculator ：             空芯电感值计算
AWG (American Wire Gauge) Diameter and Resistance Chart ：AWG导线直径-电阻表
Capacitor-Energy-Time-Constant-Calculator：电容储量、时间常数计算
Coil Physical Properties Calculator：线圈特性计算
Inductor Stored Energy Calculator：电感储量计算
Parallel Resistance Calculator：并联电阻值计算
Parallel Resistor Combination Calculator：并联电阻值的组合计算
Plate Capacitor Capacitance Calculator：平板电容值计算
Reactance Calculator：电抗计算
RMS and Average Calculator：RMS和AVG计算
Standard Resistor Value Calculator：标准电阻值计算
Steinhart-Hart Thermistor Calculator：基于Steinhart-Hart的热敏电阻校准
Straight Wire Inductor Calculator：直线电感计算
Solenoid Force Calculator：螺线管电磁力计算
Thermal Noise Calculator：热噪声计算
Voltage Divider Calculator：分压比计算
Voltage Summer Calculator：电压求和计算
WheatStone Bridge Calculator：惠斯登电桥计算
Series - Parallel Impedance Conversion Calculator：串并联阻抗转换计算

Electronics
BJT Cascode Amplifier Calculator：BJT共射,共基放大器元件参数计算
BJT Differential Amplifier Calculator：BJT差分放大器元件参数计算
BJT Transistor as a Switch, Saturation Calculator：开关状态BJT元件参数计算
Comparator Hystereses Calculator：比较器滞回特性计算
How to wire an LED, Tutorial and Resistor Calculator
JFET Buffer Bias Calculator：JFET工作点计算
MSP430 UART Register Value Calculator
NE555 Astable Multivibrator (Oscillator) Frequency and Duty Cycle Calculator
NPN Transistor Bias Calculator
Op-Amp (Inverting) Resistor Calculator：OP-Amp反相放大电阻计算
Op-Amp (Non-Inverting) Resistor-Calculator：OP-Amp同相放大电阻计算
Op-Amp Voltage Calculator：

Motors
Stepper Motor Calculator

Power Supplies
Flyback Transformer Design and Calculator
Flyback SMPS Calculator
Heat Sink Temperature Calculator
Inductor Current and Maximum Power Calculator
Voltage Regulator Resistor Divider Calculator
Snubber Design Calculator
Switching Power Supply Calculator

RF
Complete RF Amplifier Design and Analysis Calculator
Decibel Calculator
Friis Path loss Calculator
Helical Antenna Design Calculator
LC Resonance Calculator
L Matching Network Calculator
Maximum Field Strength Calculator
Maximum Flux Density Calculator
Microstrip Inductor Calculator
PI and T Pad Attenuator Calculator
Quarter Wavelength Transformer Calculator
Rollet Stability (K) Factor Calculator
Skin Effect Depth Calculator
Whip Antenna Design Calculator
Z-S-Y  Parameter Conversion Calculator

CAD/CAM
Feed Rate Calculator
GCode-Tool Path Generator for Milling Circles
G-Code Tool Path Generator for Drilling Holes
GCode-Tool Path Generator for Milling Inner of Rectangles
GCode Tool Path Generator for Series of Points
GCode Tool Path Generator for Trimming End Stock
Geometric Scaling of a Triangle
Line Segment Angle Calculator
Polar / Rectangular Coordinate Conversion Calculator
Pully Speed Calculator

Programming
Sine Lookup Table Generator Calculator

yw0238

众多常用电路参数在线计算，有用。

xxf88xxf

非常好啊，不得不顶楼主！

hu542100959

楼主很强大，真的很好

podrobert

快捷方便啊