Loading design…
iv-laszlo
This project involved designing and building a digital multimeter capable of measuring key electrical parameters such as voltage, current, resistance and temperature. The device uses sensor circuits and a microcontroller to process readings and display accurate results on a digital interface.
| Reference | Value | Description |
|---|---|---|
| Q1 | BC337-25 | |
| U1 | L7805 | |
| U2 | LM358P | |
| A1 | Arduino_Nano_v3.x | |
| C1 | 0.33 uF | |
| C2 | 0.1 uF | |
| J1 | Voltage input | |
| J2 | COM/GND | |
| J3 | Battery input (+9V) | |
| J4 | Battery input (GND) | |
| J5 | Temp sensor (TMP36) | |
| J6 | Switch ON/OFF | |
| J7 | Voltage button | |
| J8 | Current button | |
| J9 | Resistance button | |
| J10 | Temp button | |
| J11 | LCD display | |
| J12 | Current input | |
| J13 | Resistance input | |
| J14 | AREF | |
| K1 | HE721C relay | |
| R1,R6-R8 | 10k | |
| R2 | 3k3 | |
| R3 | 1 |
| R4 | 1k |
|---|
| R5 | 5k6 |
|---|
| R9 | 1k5 |
|---|