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Smart Fish Tank

Overview

The smart fish tank automates water replacement using Renesas' MCU for motor control. This complete system can be monitored and controlled via a Wi-Fi-based mobile application. Additionally, it incorporates RGB LED string control enabled by CapSense®-based touch technology.

System Benefits:

  • Operates two water pump motors and one air pump motor using a single MCU.
  • Utilizes HVPAK to control two motors on a single I2C channel, effectively reducing CPU load.
  • Integrates an ultra-low power Wi-Fi module, upgrading the system to a "smart" configuration.
  • Achieves system implementation with a compact MCU featuring a capacitive touch sensing unit (CTSU).

Block Diagram

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4:3 ratio Connector Arrow.34 Connector Line.157 Connector Arrow.42 Connector Arrow.53 Connector Line.136 Connector Line.115 Sheet.1 Sheet.2 Sheet.3 Sheet.4 WS052 WS052 WS052 AC Power Source Sheet.20 Alternating Current Connector Arrow 230V AC 230V AC 230V AC LED String LED String LED String Connector Arrow.28 Connector Arrow.29 Connected signals arrow Connected signals arrow.35 WS001.36 Haptics Touch Sheet.38 Sheet.39 Sheet.40 Sheet.41 Touch Key Sheet.44 Sheet.45 Sheet.46 Sheet.47 Sheet.48 Sheet.49 Sheet.50 Sheet.51 Sheet.52 User Input User Input User Input Vertical Wire Bundle 4 4 4 Sheet.60 Bi-directional Vertical Wire Bundle.63 4 4 4 Sheet.65 Connected signals arrow.66 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V Bi-directional.69 Connected signals arrow.71 Connected signals arrow.72 3.3V 3.3V 3.3V Vertical Wire Bundle.74 2 2 2 Sheet.76 Motor-DC Sheet.78 Sheet.79 M M Sheet.80 Connector Arrow.81 Motor-DC.82 Sheet.83 Sheet.84 M M Sheet.85 Connector Arrow.87 Motor-DC.88 Sheet.89 Sheet.90 M M Sheet.91 Connector Arrow.93 Antenna Sheet.95 Sheet.96 Sheet.97 Sheet.98 Sheet.99 Connector Line Transistor - NPN Sheet.102 Sheet.103 Sheet.104 Sheet.105 Sheet.106 FET n-channel.420 Sheet.108 Sheet.109 Sheet.110 Sheet.111 Sheet.112 Sheet.113 NPN NPN NPN Connector Arrow.116 Ground - Earth Sheet.118 Sheet.119 Sheet.120 Sheet.121 Transistor - NPN.122 Sheet.123 Sheet.124 Sheet.125 Sheet.126 Sheet.127 FET n-channel.420 Sheet.129 Sheet.130 Sheet.131 Sheet.132 Sheet.133 Sheet.134 NPN NPN NPN Connector Arrow.137 Ground - Earth.138 Sheet.139 Sheet.140 Sheet.141 Sheet.142 Transistor - NPN.143 Sheet.144 Sheet.145 Sheet.146 Sheet.147 Sheet.148 FET n-channel.420 Sheet.150 Sheet.151 Sheet.152 Sheet.153 Sheet.154 Sheet.155 NPN NPN NPN Connector Arrow.158 Ground - Earth.159 Sheet.160 Sheet.161 Sheet.162 Sheet.163 6V/12V 6V/12V 6V/12V Water Pump (Draining) Water Pump (Draining) Water Pump(Draining) Water Pump (Refill) Water Pump (Refill) Water Pump(Refill) Air Pump Motor Air Pump Motor Air Pump Motor HVPAK HVPAK HVPAK Wi-Fi Wi-Fi Wi-Fi MOSFET MOSFET MOSFET LDO LDO LDO AC/DC Flyback AC/DC Flyback AC/DC Flyback Sheet.168 MCU MCU MCU VDD VDD VDD PWM PWM PWM PWM PWM PWM PWM PWM PWM CTSU CTSU CTSU SPI SPI SPI GPIO GPIO GPIO I2C I2C I2C

MCU

RL78 Low-Power 8 & 16-Bit MCUs

HVPAK

HVPAK

MOSFET

Power MOSFETs

Wi-Fi

Low Power Wi-Fi

LDO

Linear Regulators (LDO)

AC/DC Flyback

Synchronous Rectifier Controllers

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