7. Electronics design¶
Group assignment:¶
To carry out this experience, the ATMEGA328P microcontroller was used, which was previously configured on an Arduino one. Equipment used for the experience:
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Multitester: the CD 800a model was used.
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Oscilloscope: the Tektronix-portable digital oscilloscope TDS210
check operating voltage on the board with multimeter or voltmeter.
Using the multitester, the supply voltage of the circuit based on the ATMEGA328P mcrocontroller was measured.
A small application program was made that turns on and off an LED at a frequency of 1Khz and the current that circulates through the LED was measured with the multitester. 
Using the oscilloscope we verify the operating voltage of the microcntrolate circuito, where small reading differences are observed compared to those obtained with the multitester, this is due to the error ranges in the calibration of the instruments) 
Using the oscilloscope, the signal generated in the circuit with a microcontroller was verified, where we obtain a square signal with a period of 1ms that corresponds to a frequency of 1Khz, with duty cycle of 50%. 
Reflection of the experience:¶
In this experience we can rescue the correct use of the measuring instruments used and how they help us to perform a more detailed analysis of our circuit and in this way correct some design errors.
Individual assignment:¶
To carry out this experience we will use the EasyEDA electronic design software, and the PCB design based on the ATtiny3216 microcontroller, to which a new schematic circuit will be made including an LED in the pin 5 output (A7 port).
Then we Proceed to make the PCB corresponding to the modified circuit.
