Reference design for a liquid dispenser that employs an infrared LED and a phototransistor to detect hand and dispense a predetermined quantity of liquid.
Do you wish to design your individual liquid dispenser in your residence or office, then this reference design from Renesas will simplify your job. The RL78/G11 from Renesas is a reference design for an computerized liquid dispenser that gives a hands-free answer for meting out liquids resembling cleaning soap, hand sanitiser, shampoos, or hand lotions. Designed to advertise hygiene and cut back bacterial transmission, this dispenser is appropriate for each public locations and personal establishments. By incorporating a touch-free design, the dispenser ensures that customers don’t want to the touch any a part of the nozzle, leading to a extra sanitary surroundings.
The dispenser operates based mostly on movement activation. When a hand is detected close to the nozzle, a microcontroller unit (MCU) triggers the pump motor, inflicting the dispenser to emit liquid. The quantity of liquid allotted per activation is rigorously managed to attenuate waste. This function helps preserve assets and ensures environment friendly use of the liquid being allotted.
To detect the presence of a hand close to the nozzle, the dispenser makes use of an infrared LED and a phototransistor. When a hand comes near the nozzle, it interrupts the switch of optics between the LED and the photograph transistor. The MCU detects this transformation in standing and subsequently prompts the motor to dispense the liquid. This mechanism permits for exact and dependable operation of the dispenser.
The reference design incorporates the RL78/G11 low pin and internally configurable analog MCU. This MCU provides low-power consumption and quick wake-up occasions, because of its medium-speed on-chip oscillator. Moreover, the design contains the ISL9001A high-performance low dropout linear regulator for environment friendly energy administration. The regulator helps a large enter voltage vary, from 2.3V to six.5V, whereas that includes extraordinarily low quiescent present. This helps prolong the battery lifetime of the dispenser, making certain long-lasting operation. Total, the Automated Liquid Dispenser reference design gives a handy, hygienic, and environment friendly answer for hands-free liquid meting out. Its use of movement activation, exact liquid management, and power-efficient parts make it a perfect selection for numerous purposes in each private and non-private settings.
Options of reference design embody:
- Dispenser distributes a set quantity of liquid per movement activation to attenuate waste
- If arms are positioned below the nozzle, an LED and buzzer are turned on to point liquid meting out
- Even when arms stay below the nozzle, liquid meting out has a most period of two seconds
- When the battery voltage is decrease than 4.8V, an LED blinks to point this low energy situation when arms are positioned below the nozzle.
- Quantity of liquid per movement activation: 0.5ml/0.8ml selectable
This reference design has been examined by Renesas. It comes with required design assets resembling pattern code, schematics, BoM, and so forth. You will discover extra knowledge in regards to the reference design on the corporate’s web site. To learn extra about this reference design click on here.
