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I'm just wondering, how come in the circuit in the datasheet they use polarised caps? Aren't they more expensive than ceramics?
If you have some small ceramic smd caps lying around, it's unlikely they are 4.7µF. As Nigel noted, 4.7µF ceramic caps are quite large.Can't I just use small ceramic smd caps instead (I have some lying around with high enough voltage rating)?
If you have some small ceramic smd caps lying around, it's unlikely they are 4.7µF. As Nigel noted, 4.7µF ceramic caps are quite large.