problems with resistor messuaring

#7673844
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I built the tester and it has no problems messuring diods, capazitators or transitors. It does measure resistors under 1kΩ or over 150kΩ without issue, but every value in between is way of (for example 15kΩ is measured as 5,6kΩ). Id appreate it if someone with more experience on the topic could help me. I attached the circuit im talking about.

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(Firma: 1984now) #7673862
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Vanessa schrieb:

I built the tester and it has no problems messuring diods, capazitators or transitors. It does measure resistors under 1kΩ or over 150kΩ without issue, but every value in between is way of (for example 15kΩ is measured as 5,6kΩ).

When you encounter the issue, is the ISP adapter plugged or unplugged? Or does this happen independently of the connection state of the ISP adapter?

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