Use the test equipment in your lab to observe the operation of a microcontroller circuit board

The objective of this week is to design a circuit that includes the microcontroller, at least one LED and one button, in addition to the necessary components for its operation (resistors, capacitors, oscillator, etc).
For the group assignment, Edwin made some modifications to his individual assignment plate. In the new board we have another LED to an output of the Attiny44, in addition to the one he already had. Below is the design of the board in Autodesk Eagle software.

As seen in the Electronics production week, the board was manufactured using the Roland MDX-540 CNC. The manufacturing steps are detailed in the web page of each (Edwin, Italo and Danny), after soldering the components you get the following result.

Edwin considered in the design two soldering bridges on the board, the current consumption of each LED must be measured in series on the bridges.

A Fluke brand Multimeter is used to measure the current consumption of the LED at the output of pin 6 of the Attiny44, the measured current intensity is 4mA.
A second measurement test was performed, this time an SISLENT oscilloscope was used, which has 2 measurement channels, which we will use at the same time to see the difference in the LED signals of pin 6 and pin 11.

We proceed to make the connections in parallel of each LED, were the voltage signal will be measured. It should be noted that the programming of the board consists of turning on one LED for one second, while the other is off, and when the second is turned on, the first one is deactivated, repeating this loop.

As shown in the image, both signals are measured at the same time using the channels offered by the oscilloscope, when one is on the other is off and this action is repeated whenever the plate is powered, something curious in this measurement is that the LED on pin 6 emits 5V when it is on, while pin 11 emits 2.5V when it is turned on, even though both LEDs are the same.