Circuit Project Electronic www.eleccircuit.com |
| Simple capacitance measurement using IC-555 Posted: 16 Mar 2013 09:54 PM PDT This circuit is used for the frequency counter as digit number display, that can measure the period.To show a capacitance value of the capacitor directly. According to circuit shown in Figure 1. Shows the using IC 555 as astable multivibrator. Period are as follows. T = 0.7 (RA +2 RB) Cx. If the capacitor is connected that not know value onto a position Cx, then the period time will alter based on the value of Cx because RA and RB are a constant value. Figure 1 Simple capacitance measurement using IC-555 If RA and RB are the appropriate period of time to read the meter, it will be the same as the capacitance of the capacitor. In with unit is picofarads, nano or microfarads. For example, suppose a meter long periods of time with 1 second. It’s meant to measure the capacity of one micro Farads. They will have all [...]  |
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