DISPOSITIVO DE MEDICIÓN MÚLTIPLE casero
Feb 08th, 2020 | by: ELECTRONOOBS
PARTE 1 - ¿Qué necesitamos?
- 1 x 3D files: STL here
- 1 x Arduino NANO: LINK eBay
- 1 x VL53L0X: LINK eBay
- 1 x SHARP 2Y0A21: LINK eBay
- 1 x IR module: LINK eBay
- 4 x capacitive buttons: LINK eBay
- 1 x OLED display: LINK eBay
- 1 x MPU6050: LINK eBay
- 1 x laser module: LINK eBay
- 1 x 3.7V LiPo battery: LINK eBay
- 1 x rotary encoder: LINK eBay
- 1 x USB battery cahrger: LINK eBay
- 1 x Sliding switch: LINK eBay
- 1 x Buzzer: LINK eBay
- Resistors (10k, 20k): LINK eBay
- wire, solder, soldering-iron, etc

3D STL case | DOWNLOAD |
PARTE 1.2

PARTE 1.3

PARTE 2 - ESQUEMA

PARTE 3.1 - Monta todo
Codificador rotatorio
Primero agrego el codificador rotatorio que se utilizará para medir la longitud. Para eso necesitamos la rueda impresa en 3D y necesitamos saber el diámetro de la rueda, lo cual es importante para cálculos posteriores en el código, así que mida el diámetro. Suelde 3 cables para tierra, datos y reloj. Agregue la rueda de plástico y luego pase los cables a través del orificio que tiene la caja y coloque el codificador con la rueda en su lugar. Pegue el codificador con pegamento caliente, pero no agregue pegamento en la parte superior del codificador porque esa parte será empujada hacia abajo por la parte superior de la caja impresa en 3D.

PARTE 3.2
Sensores VL5L0X y SHARP
Ahora suelde los cables a los módulos VL5L0X y SHARP 2YA021. Uno necesita 4 cables y el otro 3. Atornille el VL5L0X en un lado de la caja con el sensor mirando hacia el exterior de la caja. Luego atornille el sensor SHARP en su lugar y asegúrese de que no salga por el exterior de la caja, ya que si se dosifica, destrabará el medidor y necesitamos que la parte inferior esté plana para el modo de nivel. Si se dosifica, solo agregue algunas arandelas y empújelo un poco hacia arriba.

PARTE 3.3
MU y medidor de RPM
Para detectar ángulos de nivel y medida, utilizamos el módulo MPU6050 IMU que funciona con la comunicación serial i2c. Suelde tierra, vcc, datos y reloj a este módulo y péguelo en el centro de la caja en la parte inferior y asegúrese de que esté alineado con las paredes de la caja y bastante plano. A continuación, agregue 3 cables al sensor de infrarrojos y péguelo en la pared frontal de la carcasa, allí encontrará 2 agujeros para este sensor. Deberá mover el potenciómetro del sensor IR y asegurarse de que detecte la luz que regresa de una franja blanca colocada frente al sensor. Con eso detectaremos rotaciones.

PARTE 3.4
Batería y láser
Finalmente, conecte los cables positivo y negativo de la batería a los pines B + y B- del cargador de batería. Luego, conecte la salida positiva al pin central del interruptor deslizante. También suelde un cable negro a la salida negativa del cargador. Pegue el interruptor en su lugar en el lateral y el cargador de batería también en el lado inferior de la caja. Verifique que el conector USB encaje y podría cargar la batería. Pegue la fuente en el otro lado y también pegue el puntero láser con un poco de pegamento caliente. Es hora de conectar todo al Arduino.

PARTE 3.5
Conecta todo
Finalmente agregue Vcc, gnd y cables de datos a 4 botones capacitivos. Pegue los que se muestran en la foto a continuación en la parte superior de la caja impresa en 3D. Agregue cables a la pantalla OLED y péguela también en la misma parte. Ahora conecte todos los cables al Arduino como en el esquema. Agregue también el zumbador pequeño. Finalmente, vaya a la siguiente parte y descargue el código y cárguelo al Arduino y pruebe.

PARTE 4 - Código
Código Arduino metro | DOWNLOAD |
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Sebastián Sombra
Hola. Traté de hacer este tutorial siguiendo el video y la página original en inglés, pero había unos errores que mencioné en los comentarios del video pero desafortunadamente nunca recibí respuesta y tuve que dejar incompleto el video. Veo que no se han corregido aún en esta traducci{on a español. Me gusta mucho tu trabajo, pero sería bueno que te tomarás tiempo para responder a la gente, particularmente cuando estos tutoriales suelen ser seguidos por gente que no tiene mucho conocimiento (como yo) y que requieren ayuda si el tutorial tiene inconsistencias entre el código y los esquemas de conexión. Es imposible para alguien que no es experto arreglar las inconsistencias y crea mucha frustración dejar incompleto un proyecto en el que se ha invertido tiempo y dinero. Las inconsistencias: 1. En el esquema el sensor Sharp esta conectado a A0, pero en el código de define en A1 2. En el código la batería se define en A0, donde se conecta el sensor sharp en el esquema 3. En el video se habla de un divisor de voltaje para la batería, pero no hay nada de eso en el esquema.