The aim of this project was to build a budget LCR meter which can measure Resistance, Capacitance, and Inductance with an overall accuracy of 95.6%.
Note: Please ignore the uta_iot_network and nRF24L01 directories as these were a push issue on my end. They are part of a different repository.
- Tiva C Series (TM4C123GH6PM)
- Peripherals: GPIO, UART, Timer, ADC, Analog Comparator
- IDE: Code Composer Studio
- Programming Language: C
- Hardware
- Digital Multimeter
- Oscilloscope
- Software
- Code Composer Studio Debugger
| Part | Quantity |
|---|---|
| 2N3904 NPN transistor | 5 |
| 2N3906 PNP transistor | 2 |
| 33ohm, 1/2W resistor | 1 |
| 3.3kohm, 1/4W resistor | 7 |
| 10kohm 1/4W resistor | 7 |
| 100kohm, 1/4W resistor | 1 |
| 1N5819 Schottky diode (flyback diodes) | 4 |
| 1uF capacitor (integrator) | 1 |
| 47uF capacitor (power supply) | 1 |
| 2x10 double-row header, unshrouded | 2 |
| HD44780 LCD display | 1 |
| Pushbuttons | ~6 |
| Wire (22-24 AWG solid wire, 3+ colors) | 1 |
| PC board (approx 4.5x6”) | 1 |
I was always fascinated by PCB fabrication and due to not having direct access to that I decided to make my wiring resemble PCB traces to the best of abilities. This is not the best design as the solder joints might break if enough force is applied on them, but they are strong enough to withstand quite a bit of impact.