More about tires Tire sizes are expressed by the manufacturers with three sets of numbers: Tread width – Aspect Ratio – Wheel diameter (e.g. 215 55 R16) Automobile tires are…
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This category contains electronics design calculators
Supercapacitor-Ultracapacitor discharge characteristics calculator
Super capacitor discharge time calculator. This calculator determines timekeeping operation using a supercapacitor (ultracap) based upon starting and ending capacitor voltages, discharge current, and capacitor size. Formulas used: Bt(seconds) =…
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Multilayer air core inductor design calculator
The formula used in this calculation is from the famous Wheelers approximations which is accurate to <1% if the cross section is near square shaped. L (uH) =31.6*N^2* r1^2 /…
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Single layer air core inductor design calculator
Winding the wire in a single layer produces an inductor with minimal parasitic capacitance, and hence gives the highest possible self-resonant frequency (SRF). Striving to obtain a high SRF and…
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Flat spiral air core inductor design calculator
This is an popular coil geometri used in todays wireless charger circuits. The formula used in this calculation is based on the Harold A. Wheeler approximations for air core flat…
Read MorePlanar spiral coil inductor design
The first approximation is based on a modification of an expression developed by Wheeler; the second is derived from electromagnetic principles by approximating the sides of the spirals as current-sheets;…
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