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'''About the circuit''' | |||
*The circuits consist of nine (UFO) and five (stars) LEDs (D1 to D14). They are connected so it is possible to only use one switch (SW1) to turn all the lights on. | *The circuits consist of nine (UFO) and five (stars) LEDs (D1 to D14). They are connected so it is possible to only use one switch (SW1) to turn all the lights on. | ||
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*The capacitors (C1 and C2) have a value of 100nF. | *The capacitors (C1 and C2) have a value of 100nF. | ||
*There has not been the right footprint in the library for the microphone I want to use. I worked with the footprint editor in KiCad to create a new one. | *There has not been the right footprint in the library for the microphone I want to use. I worked with the footprint editor in KiCad to create a new one. | ||
(photo circuit) | (photo circuit) | ||
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To check if the circuit works before ordering the PCBs, I built it on a circuit board. The circuit itself works but I recognized that its perception of the auditory signal is very low. | To check if the circuit works before ordering the PCBs, I built it on a circuit board. The circuit itself works but I recognized that its perception of the auditory signal is very low. | ||
The make it more sensitive, I doubled a part in the beginning of the circuit - two resistors, the capacitor and one of the transistors (R17, R18, C2 and Q10). This change effects that the LEDs blink although the sound source is more quiet or more distant from the microphone. | The make it more sensitive, I doubled a part in the beginning of the circuit - two resistors, the capacitor and one of the transistors (R17, R18, C2 and Q10). This change effects that the LEDs blink although the sound source is more quiet or more distant from the microphone. | ||
(video) | (video) | ||