Embedded Calculators & Part Finder
Size a value with 64 free calculators, then find the real component that fits — in stock, at the best price. For MCU, power, RF & firmware. No account.
★ Popular
💡LED Resistor
⚡Ohm's Law
🚌CAN Bit Timing
🔻Voltage Divider
🔠Glyph Mapper
📦Struct Padding
PWM / Timer
Frequency, period, duty cycle
UART Baud Rate
Error rate, PASS/FAIL check
ADC Resolution
LSB voltage, SNR, dynamic range
Watchdog Timer
STM32 IWDG & WWDG timeouts
I2C Timing
Bus timing & pull-up values
CAN Bus Bit Timing
STM32 bxCAN/FDCAN & MCP2515
SPI Timing
Bit period, frame, throughput
RS-485 Bus
Cable length, termination, bias
LIN Bus Timing
Bit, break, frame time
Modbus RTU Timing
Char & inter-frame gaps
Ring Buffer / DMA
Buffer sizing
Register Map → C
Bitfield struct & macros
CRC → C Code
Lookup table & function
Stepper Motor
Steps/rev, microstep, pulse rate
BLDC / PMSM Speed
Motor electrical freq, pole pairs
Rotary Encoder
Motor encoder counts/rev
Motor Torque ↔ Power
N·m, RPM, Watts, hp
MOSFET Power Loss
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Transformer Turns
Ratio, Ns, current ratio
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Heat dissipation & efficiency
I2S Audio Clock
BCLK, LRCLK, bit period
USB Data Lines
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Ethernet Cable
Bit time, delay, 100m limit
Bit Field Visualizer
32-bit register breakdown
Q-Format Converter
Float ↔ fixed-point
Number Base Converter
Dec, Hex, Bin, Oct converter
IEEE 754 Visualizer
32-bit Float & 64-bit Double
Endian Swap
Big/Little/Mid-Endian byte swap
Struct Alignment
C struct padding & visualizer
Memory & Transmission
Bytes, baud rate & sample times
Glyph Mapper
7-Segment & Character LCD custom font generator
Crystal Load Cap
Oscillator load capacitor sizing
Ohm's Law
V, I, R, P — any 2 → all 4
Voltage Divider
Vout, loaded divider, Thevenin
LED Resistor
Series/parallel configs & E24
Resistor Code
Color bands & SMD decoder
Op-Amp Gain
Amp configurations & Schmitt
Instrumentation Amp
3-op-amp in-amp gain & Vout
Op-Amp Resistor
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BJT Bias CE
Q-point & stability factor
NE555 Timer
Astable / monostable
Capacitor Charge
RC time constant, τ milestones
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AWG Wire Gauge
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Series / Parallel
R · C · L equivalent value
LM317 Regulator
Adjustable Vout & R2 solver
Current Divider
Branch currents in parallel R
LC Resonance
LCR resonant freq, Q-factor
RC Filter
Cutoff frequency, gain & phase
dB Converter
dB, dBm & mW bidirectional
CRC Calculator
CRC-8/16/32, 7 polynomials
Checksum / CRC
XOR, Sum8/16, LRC, CRC
PCB Trace Calc
IPC impedance & trace width
Active Filter
Sallen-Key 2nd-order LPF/HPF
RF Trans. Line
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Γ, return & mismatch loss
RF Link Budget
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Attenuator Pad
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Coil Inductance
Air-core solenoid (Wheeler)
Battery Life
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Temperature
Units & RTD sensor temps
Wheatstone Bridge
Bridge Vout & balance
Junction Temp
Thermal Tj & max power
LC Resonance Calculator
Calculate resonant frequency, angular frequency, Q-factor, and bandwidth for series or parallel LC/LCR circuits.
Input Parameters
Results
Resonant Frequency (f0)—
Angular Frequency (ω0)—
Characteristic Impedance (Z0)—
Quality Factor (Q)—
Bandwidth (BW)—
Damping Ratio (ζ)—
💡 Usage & Formula
LC Resonance occurs when inductive and capacitive reactances cancel each other out, making the circuit act as a bandpass or bandstop filter.
Formulas:
- Resonant Frequency:
f0 = 1 / (2 * pi * sqrt(L * C)) - Series Quality Factor:
Q = sqrt(L / C) / R - Parallel Quality Factor:
Q = R * sqrt(C / L)
Usage: Enter your Inductance (L) and Capacitance (C) to find the resonance point and characteristic impedance.
When you need it: Finding the resonant frequency of an LC tank for a filter, oscillator or matching network, plus its characteristic impedance for setting the loaded Q.
Worked example: L = 10 µH, C = 100 pF → f = 1 / (2π√(LC)) ≈ 5.03 MHz. The characteristic impedance is Z0 = √(L/C) = √(1e5) ≈ 316 Ω.
Tips & gotchas:
- Frequency scales as
1/√(LC)— to halve it, quadruple either L or C. - Loaded Q sets bandwidth:
BW = f / Q, so a high-Q tank is narrow and sharp. - Stray board capacitance and lead inductance shift the real resonance — expect to trim in hardware.
- Use NP0/C0G capacitors for a stable, low-drift tank; class-2 dielectrics move with temperature and bias.
📖 References:
LC circuit (Wikipedia)