10/23/2023 0 Comments Car battery monitor picThe range of input voltage can be increased simply by lowering the value of R2. Therefore, the maximum input voltage (V Battery) that could be measured without A/D saturation can be obtained from the following equation, The maximum measurable input voltage at AN4 is 4.096 V (limited by using the internal 4.096 V reference voltage for A/D conversion). The R1 and R2 resistors at the ADC input channel creates a simple voltage divider network to scale down the incoming voltage from the battery’s positive terminal. The PIC16F1827 microcontroller uses the AN4 ADC channel for measuring the voltage across the car’s battery terminals. The circuit diagram of this project is shown below. Read my previous article, Using Fixed Voltage Reference (FVR) for A/D conversion in enhanced mid-range PIC microcontroller, to find more information on the FVR module of PIC16F1827. The measured instantaneous battery voltage is shown on a 4-digit seven segment LED display. Before feeding to the ADC channel, the battery output voltage is scaled down to below the reference voltage by using a voltage divider network. The FVR module inside PIC16F1827 is chosen to derive a stable positive reference voltage of 4.096 V for precise A/D conversion. The battery terminal voltage is measured through an ADC channel of PIC16F1827. The +5V power supply for the PIC16F1827 microcontroller circuit is derived from the car’s battery output voltage (usually +12V) using a regulator IC (such as LM7805). The functional block diagram of this project is shown below. However, if the engine is on or the car is running, it actually measures the charging voltage across the battery that is coming from the car’s charging system (alternator + rectifier). When the engine is turned off, the voltage measured by this device is the actual output voltage from the battery. Microchip’s PIC16F1827 is the main controller in this project, which uses the built-in Fixed Reference Voltage (FVR) module to achieve a very precise and accurate A/D conversion of the battery voltage.Īs I said this project is simply about making a precise digital voltmeter that plugs in to the car’s cigarette lighter receptacle and displays the instantaneous voltage across the battery terminals. It plugs into the car’s cigarette lighter receptacle and displays the instantaneous output voltage across the battery terminals on a 4-digit seven segment LED display. This helps you to get early warnings for possible battery and its charging system problems. This project is about making a simple electronic voltage monitor system for car’s battery and its charging system. If the charging system is not working properly, the battery will not get the proper charging voltage (about 13.8 V for 12V battery) across its terminals and it could go flat. This may not seem to be that important but one of the most common reasons for a car battery failure is the faulty charging system. However, one thing that I personally find missing is the real-time monitoring of voltage across the car’s battery terminals. My 2010 Equinox has got every feature that a modern automobile should have. Online Schematic and Circuit Diagram Tool.Microcontrollers and other Microchip devices Search tool.Find debuggers, programmers, compilers, adapters, socket modules and other accessories for your product.Pic16f877 based projects PIC Microcontroller PDF.Pic16f72 microcontroller based Project List” is locked Pic16f72 microcontroller based Project List.Online Courses to Learn Pic Microcontroller Programming.Advanced View Pic Microcontroller Projects List.Pic10f series microcontroller based Project List of PDF.Pic16f72 microcontroller based Project List of PDF.PIC32 microcontroller based Projects List of PDF.Pic18f452 microcontroller based projects list PDF.Pic18f4550 microcontroller based projects List PDF.Pic16f877 based projects – PIC Microcontroller PDF Downloadable.Proteus based Pic Microcontroller Projects pdf.Pic10f series microcontroller based Project List.Pic18f452 microcontroller based projects.Pic18f4550 microcontroller based projects.Pic16f877a microcontroller based projects list.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |