HP 65 with capacitor wired to battery terminals - why?
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07-20-2021, 04:26 PM
Post: #5
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RE: HP 65 with capacitor wired to battery terminals - why?
Quote:Any idea how long an HP-65 would run from a 4700uF capacitor?According to my approximate calculations, this time will be no more than 0.2_sec. If this calculator consumes a current of 0.05_A at 4_V (I don`t remember exactly) and turns off at a voltage of 2.4_V, then it will be: t=c×r×Ln(Us/Uf)=0.192_sec. c=4700_μ, r=80_Ω, Us=4_V, Uf=2.4_V. |
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