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常用电子 / 电工 / 传感器 / Thermal Design / Mechanics / Thermodynamics / 电磁学Calculate工具
191电子 / 电工 / 嵌入式 / 传感器 / Thermal Design / Mechanics / Thermodynamics / 电磁学High频Calculate器，SVG 图示Calculate模型，填参数即时出结果：Resistance分压、DC-DC 反馈Resistance、TL431 反馈（Flyback / Forward）、PCB 阻抗 / 载流、CAN bits定时、CRC check、4-20mA、NTC / PT100、PLC 模拟量、散热器选型、Battery stringandCharge、Sallen-Key 滤波器、传输线延时、VSWR、motor选型、线路voltage drop、calorie诺效率……
Sensors & Instrumentation
6 tools4–20 mA Current Loop Converter
Convert loop current to engineering units (temperature, pressure, level) and back, with percentage, sense-resistor drop and wire-break detection.
Value = LRV + (I − 4mA)/16mA × (URV − LRV)NTC Thermistor Temperature Calculator
Two-way B-equation conversion between temperature and resistance, plus reverse calculation from a pull-up + ADC reading, with sensitivity and ADC resolution.
R = R25·e^{B(1/T − 1/T25)} ｜ 1/T = 1/T25 + ln(R/R25)/BPT100 / PT1000 RTD Converter
Two-way platinum resistance conversion per IEC 60751 (Callendar–Van Dusen), with sensitivity and lead-resistance error estimates.
R(T) = R0[1 + A·T + B·T² (+ C(T−100)T³)], A = 3.9083e−3Thermocouple mV ↔ Temperature (Cold-Junction Compensated)
Convert thermocouple EMF to temperature for K/J/T/E types with cold-junction compensation — forgetting this step is why a meter reading can be tens of degrees off.
E(T_hot) = E_meas + E(T_cold), then look up the tablePLC Analog Scaling (27648 / 32767 / 4000)
Two-way conversion between PLC analog codes and engineering values for Siemens 27648, generic 32767 and Mitsubishi/Omron 4000 full scales, with wire-break and over-range detection.
Value = LRV + (code/full-scale code × signal span − signal low)/(signal span) × (URV − LRV)Load Cell Output & Gain Calculator
From mV/V sensitivity and excitation, compute bridge output at full scale and at the current load, the gain needed and the ADC bits required — before wiring up an HX711 or ADS1232.
V_out = V_ex × sensitivity (mV/V) × load / capacity