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