Automatic Raindrop Wiper System Using 555 Timer

In today’s world, automatic system features are widely available in luxury cars. The Automatic Raindrop Wiper System is one of them to wipe out the raindrop from the car windshield. That’s why we have seen automatic wiper systems in most cars where the windshield wiper consequently gets actuated when there is raindrops or if there is some water on the windshield.

Therefore, an automatic raindrop wiper system is an essential system that is attached to a standard luxury car to wipe the water on the windshield during rainfall. Generally, this system is manually operating and we have to turn it ON to start their operation.

Henceforth, today we are going to build an automatic raindrop wiper system using just two ICs 555 Timer IC and LM358 op-amp. This circuit consequently senses the raindrop through the sensor and automatically activates the wiper system to clear the windscreen.

We recommend you read our previous 555 Timer Projects.


Automatic Raindrop Wiper System Using 555 Timer

Circuit Diagram

Automatic Raindrop Wiper System Circuit Diagram

Components Required

  • 555 Timer IC
  • LM358 Op-Amp IC
  • L293D Motor Driver IC
  • Rain Sensor
  • BC557 Bipolar Junction Transistor
  • LED (Red, Green)
  • Resistor (1K, 10K, 2.2M)
  • DC Motor (Demonstration)
  • Capacitor (0.01uF, 0.47uF)
  • Breadboard
  • Connection Wire
  • 9V Battery

PCB Design

After designing the schematic diagram of the Raindrop Wiper System, the assembled components and wiring are too clumsy and looked very unprofessional. In fact, the wiring also has a chance of loose connection. To give it a clean and professional look and compress the size, I decided to build its PCB prototype using EasyEDA software as it is so simple to use. Now come to the main part, where we need to order our PCB prototype. I always prefer PCBWay for its quality assurance, fastest delivery, and 24/7 customer support.

PCB View

Raindrop Wiper System 2D View
2d View
Raindrop Wiper System 3D View
3D View

My Opinion About PCBWay

To start off with, PCBWay is a Chinese-based PCB (printed circuit board) prototype, PCB assembly, SMD Stencil and Flexible PCB manufacturing company. For the past 1.5 years, I have been collaborating with them on my projects and genuinely it is an awesome experience. So today, I will state and give my personal opinion regarding the online service of PCBWay. I have been offered to promote some other PCB manufacturing companies, but compared with them, I feel like PCBWay combines an excellent price and customer service factor in one single serving. What is also spectacular about PCBWay to me, as a maker and customer, is their service. From their friendly support staff to their intuitive, user-friendly website UI, it all counts towards what makes PCBWay an ideal company for any electronic hobbyist.

When I first approached PCBWay, the features to navigate around their website really astound me, especially since their website is full of features, PCB functions and information about the brand. I also observed their sales statistics on their webpage, which intrigued me a lot because of their high figures for successful payments, partnerships, and published projects. Not many companies truly display their sales information, so this really caught my eye. I also experienced some contests arranged by PCBWay where you will get lots of coupons, lucky draws, discounts, amazing electronics prizes and a few more by simply participating in them.

Moreover, their website includes an instant quote feature, so if you are directed to their homepage, you can put your custom PCB details and Gerber file to receive an estimated price. Also, if you want to view your Gerber file, you don’t need to go anywhere else. PCBWay also provides this facility by clicking this “Gerber File Viewer” link.

Now, once you have put all your customisation options in place and made your final choices, you can receive a quote directly from the website with a rough price estimate. The price of your product will be based on the options you choose, with the higher, more expensive options contributing to your price more heavily. Shipping is also included separately, with DHL being the most expensive method and standard airmail being the cheapest method of shipment. Your country’s location also matters when determining the shipping cost. The nice thing about PCBWay’s website is that you can see how the final price is broken down by certain costs. Furthermore, there is a choice for you to select your build time and shipping method so that when you change it, you can instantly see the price difference. So go to their website and check out their recent offers and more.

Working Principle of Raindrop Wiper System

The working principle of this automatic raindrop wiper system project is so basic. Basically, this whole circuit has four sections that are an astable multivibrator, comparator, motor driver, and rain sensor.

When a raindrop falls on the rain sensor, it will trigger the BC557 transistor. Subsequently, the PNP transistor turns ON the power supply to distribute it to the entire circuit and therefore the circuit begins until there is any water on the rain sensor.

Moreover, when the output of the 555 Timer IC goes HIGH, the op-amp IC LM358 gives a LOW output and if the 555 Timer goes LOW, then the op-amp goes HIGH. By using these two outputs together, DC motors start rotating in both clockwise and anticlockwise directions rapidly. Thus, the wiper attached to the circuit turns right to the left and left to the right, through the motor driver L293D. That’s how the rain sensor automatically senses the raindrop and gets activated. Two LEDs are additionally used here for indication.

Application of Raindrop Wiper System

  • Used in an automatic car wiping system.
  • Can be used in the home window cleaning system.

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