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user17592
user17592

There is a solution using a microcontroller. Microchip wrote AN611 on it, but I'd recommend you this blogpost instead.

How it's done: you start charging the capacitor and time how long it takes to get to \$\frac{1}{2}V_{IN}\$\$\frac{1}{2}\cdot V_{in}\$.

enter image description here

The 16F628A isn't necessary at all, you can use any microcontroller with a comparator.

enter image description here

With that time (the time it takes to get to \$\frac{1}{2}\cdot V_{in}\$), you can calculate the RC value of the RC circuit. You know R, it's 22K in the circuit above, it's constant. So you can calculate the value of C.

There is a solution using a microcontroller. Microchip wrote AN611 on it, but I'd recommend you this blogpost instead.

How it's done: you start charging the capacitor and time how long it takes to get to \$\frac{1}{2}V_{IN}\$.

enter image description here

enter image description here

With that time, you can calculate the RC value of the RC circuit. You know R, it's 22K in the circuit above, it's constant. So you can calculate the value of C.

There is a solution using a microcontroller. Microchip wrote AN611 on it, but I'd recommend you this blogpost instead.

How it's done: you start charging the capacitor and time how long it takes to get to \$\frac{1}{2}\cdot V_{in}\$.

enter image description here

The 16F628A isn't necessary at all, you can use any microcontroller with a comparator.

enter image description here

With that time (the time it takes to get to \$\frac{1}{2}\cdot V_{in}\$), you can calculate the RC value of the RC circuit. You know R, it's 22K in the circuit above, it's constant. So you can calculate the value of C.

Source Link
user17592
user17592

There is a solution using a microcontroller. Microchip wrote AN611 on it, but I'd recommend you this blogpost instead.

How it's done: you start charging the capacitor and time how long it takes to get to \$\frac{1}{2}V_{IN}\$.

enter image description here

enter image description here

With that time, you can calculate the RC value of the RC circuit. You know R, it's 22K in the circuit above, it's constant. So you can calculate the value of C.