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We use this multimeter.
** Voltage **
FTDI cable supply 5V voltage to Hello board. <br>
So first we tried to measure voltage. <br>
Put multimeter tips to VCC and GND. <br>
And it said 5.04V.<br>
** Resistor **
We tried to measure resistance value. <br>
There are three resistor in Hello board. <br>
One is 499ohm with LED and two are 10K. <br>
We measured all of those resistor and it said 498ohm and 9980ohm, 9990ohm each. <br>
** Current **
Without pushing button, current was 7A.<br>
When we push the button, electricity goes though 499ohm resister and LED. <br>
So we measured current again.
Then current was 3.2A.<br>
We decided to try to measure the frequency of the resonator.<br>
GND on one side and ATtiny44 on the other side.<br>
The measurement result was 101.9 Hz for the part connected to PB0 and 226.8 Hz for the part connected to PB1.<br>
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