On this page you will find all kinds of "easy to build" solutions that will assist in your product development.

Downloadable documents:

  • User's Manual
  • Sample S/W Source Code
  • Circuit Diagram
  • PCB & BOM

Quick Solution

Handy Vacuum Cleaner

Product: RL78/G1F, ISL94203

This vacuum cleaner reference design enables switching between two operation levels: high or low suction power. The sensorless 3-phase BLDC motor is rotated at high speed to provide the appropriate strength of suction for each level. The battery-driven, cordless operations make vacuuming with one hand a breeze!

The RL78/G1F comes with a built-in programmable gain amplifier (PGA), comparator (CMP0), and PWMOPA for overcurrent detection and PWM output-forced cutoff control. With 120-degree conducting control, the 4-input selectable comparator and motor control auxiliary timer can achieve sensorless rotor position detection even when the motor is stopped or rotating at high-speeds exceeding the maximum 50Krpm.

The ISL94203’s power management provides battery charge and discharge control, current and voltage monitoring, and battery balance control.

User's Manual, Source Code, Circuit Diagram, PCB & BOM included.

 Batch Download

Automatic Liquid Dispenser

Product: RL78/G11, ISL9001A

When a hand is detected near the nozzle, the MCU triggers the pump motor and the dispenser emits liquid. The liquid is automatically dispensed without the hand touching any part of the nozzle, resulting in a more hygienic environment.

When a hand comes close to the nozzle, it blocks the transfer of optics between the infrared LED and photo transistor. The MCU detects the change in the photo transistor status, and then activates the motor.

The RL78/G11 MCU operates the system clock with a medium-speed on-chip oscillator, achieving low-power consumption and fast wake-up of 4μs.

The ISL9001A used for power management can source a current of up to 300mA. This regulator helps extend battery life as it supports a wide input voltage range (2.3V~6.5V) while featuring extremely low quiescent current.

User's Manual, Source Code, Circuit Diagram, PCB & BOM included.

 Batch Download

Smart Power Strip

Product: RL78/G10

Smart power strip is a popular household appliance, which is widely used in intelligent linkage control and power saving of connected devices.

It can control power supply of multiple terminals in conjunction simultaneously, such as mainframe computer (master device) and monitor (slave device). The timer function of RL78/G10 can detect when master outlet is turned on or off and supply power to slave outlet automatically when master outlet is on.

User's Manual, Source Code, Circuit Diagram, PCB & BOM included.

 Batch Download

Mini Power Monitor

Product: RL78/L13

Mini power monitor is a power meter that can accurately measure power consumption of electric appliances, such as air conditioner & refrigerator.

This application is realized by using RL78/L13’s serial array unit, timer module, buzzer output control and A/D module, etc. It can measure voltage, current, frequency, total energy consumption and CO2 emission values etc., record them in on-chip data flash and display via LCD driver. To prevent fire, buzzer alarm will go off when ambient temperature is higher than 60 °C.

User's Manual, Source Code, Circuit Diagram, PCB & BOM included.

 Batch Download

Smart Moisture Sensor

Product: RL78/G11, RL78/G1D Module

This solution can monitor the temperature and humidity of plants and agriculture soil, and even supply water automatically.

It uses RL78/G11’s moisture sensor to measure the conditions of soil, and transfer the data to smart phone app by RL78/G1D BLE module which can be shown by graph. Additionally, it can control the water valve by outputting motor signal. The system also includes a buzzer to warn user if the soil becomes too dry.

Smart Moisture Sensor Board Image

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Smart Moisture Sensor Solution Image

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Household Gas Alarm

Product: RL78/G10, ISL28113

This is a system that warns people with flashing LED and buzzing alarm as soon as the change of carbon monoxide concentration is detected due to gas leakage or incomplete combustion etc. Your home safety level could be improved with this simple device.

RL78/G10 controls LED and buzzer by using buzzer output controller. The voltage value obtained by amplifying output voltage of carbon monoxide sensor with ISL28113 (operational amplifier) ​​is converted by A/D converter every second to acquire carbon monoxide concentration data. Buzzer will sound when it judges that warning is required. In addition, with the STOP mode function of RL78/G10, low power consumption control can be realized. The RL78/G10 is a small pin microcontroller best suited for consumer product miniaturization.

User's Manual, Source Code, Circuit Diagram, PCB & BOM included.

 Batch Download

Start evaluation using MCU Simulator Online

* Please use the latest version of Google Chrome, Mozilla Firefox, or Microsoft Edge.

Window Alarm with Buzzer

Product: RL78/G10

This is a solution that could be installed on windows and door entrance etc., and when vibration caused by outside force is detected, alarm will sound to scare off intruders.

This solution uses RL78/G10 functions such as external interrupt, timer module, buzzer output controller and watchdog timer, etc. In normal situation when there is no vibration, the device will enter STOP mode. When vibration is detected, it will release from STOP mode and sound the alarm. With RL78/G10 STOP mode function, power consumption is suppressed, allowing battery life to last longer.

User's Manual, Source Code, Circuit Diagram, PCB & BOM included.

 Batch Download

Start evaluation using MCU Simulator Online

* Please use the latest version of Google Chrome, Mozilla Firefox, or Microsoft Edge.

PM2.5 Monitor with Portable Battery

Product: RL78/L12, ISL97656, ISL6294

This is a portable device that can measure and detect the concentration of PM2.5, an air pollutant in real-time. The density is displayed on LCD panel, and LED color (red/green/blue) shows the air quality. It also has a charging and power supply function as a mobile battery, and displays battery capacity with 4 LEDs. If the preset concentration threshold is exceeded or the battery voltage drops below 2.8 V, it will inform you with a buzzer.

This solution is realized by RL78/L12’s function such as I/O port, A/D converter, buzzer, LCD controller, STOP mode, etc. best suited for small home appliances. In addition, ISL97656 (DC - DC converter IC) controls battery discharge and ISL6294 (battery charger IC) can controls charging. The threshold value and PM2.5 concentration data are saved in EEPROM (if data amount is less than 2 KB, you may also use the data flash built in RL78/L12).

User's Manual, Source Code, Circuit Diagram, PCB & BOM included.

 Batch Download

Infrared Human Sensor

Product: RL78/G10

This is an application that detects human presence/absence by infrared sensor, and turns on/off high brightness LED automatically. It can be applied to a wide range of applications including office lights and automatic doors... etc.

Infrared LED sending signal is controlled by RL78/G10’s timer array unit (TAU01), and receiving signal is controlled by timer array unit (TAU00) and external interrupt terminal (INTP0). When a person is detected, the high brightness LED will light up. Once the person leaves the detection area after 10 seconds, LED will go off and system will enter infrared receiving signal STOP mode. RL78/G10 hold’s the lowest current consumption in industry and is ideal for human sensor.

User's Manual, Source Code, Circuit Diagram, PCB & BOM included.

 Batch Download

Smart Blood Pressure Monitor

Product: RL78/L1A

The device can check systolic/diastolic blood pressure, pulse rate, etc. and confirm the result and battery percentage with LCD display and smartphone application. Simply press the button on the smart blood pressure monitor or application to start the measurement process automatically. With RL78/L1A, you can operate various sensors and sync your readings to your smartphone by RL78/G1D’s BLE function. The built-in rich peripheral functions realize cost reduction of the set.

Smart Blood Pressure Monitor Board Image

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* This solution is a non-medical device.

Safety Light Curtain

Product: RL78/G11

A safety device that can emergently stop the operator when people or object is detected at the pinch point. It controls the infrared emitter (projected side) and receptor (receiving side) from the RL78/G11 microcontroller via an analog multiplexer. The port outputs NPN signal and controls external relay. If the settings are normal and no object detected in the protected area, LED will light up to indicate safety. RL78/G11 is suitable for products with sensor application technology.

User's Manual, Source Code, Circuit Diagram, PCB & BOM included.

 Batch Download

Safety Light Curtain Board Image

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High-End Gas Cooker

Product: RL78/G11

This solution enables real-time gas concentration detection, flame temperature detection and dry burn detection. When safety issues such as gas leak occur, the electromagnetic valve will close to extinguish fire immediately and sound the alarm. This realizes an ultimately safety stove.

With RL78/G11 enhanced built-in peripherals, such as A/D module, timer module and buzzer output circuit, functions such as gas concentration detection, pulse ignition, ignition feedback, alarm… etc. can be performed without a problem.

User's Manual, Source Code, Circuit Diagram, PCB & BOM included.

 Batch Download

High-End Gas Cooker Board Image

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High-End Gas Cooker Solution Image

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Smart Body Fat Scale

Product: RL78/L1A

By inputting gender, age, height etc. into the device, information for health management such as body fat can be measured easily. The result value calculated from weight and bio-impedance can be displayed on LCD monitor and checked through smartphone application simultaneously. 
This solution is accomplished by using RL78/L1A integrated with rich analog peripherals & LCD, and RL78/G1D BLE communication function. It is suitable for healthcare bio-sensing applications.

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* This solution is a non-medical device.

Water Quality Tester

Product: RL78/G11

Check water quality and detect hazardous substances in areas such as industrial wastewater, aquarium… etc. By dipping the front part of the device into the water and gently stir to dislodge any bubbles, TDS (Total Dissolved Solids) can be detected immediately. Measured value will display on the LCD monitor and saved by pressing Hold button for convenient reading and recording. Temperature (°C/°F)  can also be displayed by pressing Temp button. The device includes an auto-off function, which will shut off automatically after 5 minutes without use.

User's Manual, Source Code, Circuit Diagram, PCB & BOM included.

 Batch Download

Water Quality Tester

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Portable Environment Monitor

Product: RL78/G11

Environment conditions need to be recorded in various scenarios ranging from agricultural environment investigation to factory audit and energy saving monitoring activities in offices.

Portable environment monitor is a convenient tool that enables real time tracking of temperature, humidity and luminance that could be reflected on the monitor display. This solution suits perfectly for IoT sensor module.

By simply using four keys, you can set high / low limits of temperature, humidity and luminance. The set value is saved in data flash and once the value exceeds, the alarm will buzz and an arrow symbol will be shown on the LCD module.

User's Manual, Source Code, Circuit Diagram, PCB & BOM included.

 Batch Download

Portable Environment Monitor

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PowerPoint Presenter

Product: RL78/G1D

Control slideshow smoothly during presentation with a wireless presenter. Complete page up/page down/ black screen actions simply by pressing a few buttons on RL78/G1D board and exchange data through BLE (Bluetooth® low energy) communication.

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Smart Lock

Product: RL78/G1D

Lock and unlock your door remotely simply by an application on your smartphone. With the built-in alarm mode (activates when chain is cut off in lock status) and password management function in application, overall safety can be increased. This is achieved by using the RL78/G1D MCU BLE microcontroller (Bluetooth® low energy) to connect to your smartphone.

Smart Lock
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Smart LED

Product: RL78/G1D

The luminescence of LED lighting can be easily adjusted by an application on your smartphone. This is achieved by using the RL78/G1D MCU BLE microcontroller (Bluetooth® low energy) to connect to your smartphone.

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* The above images are of prototype boards by Renesas, not available for sale.