Measuring capacitance is not easy on the pocket to most hobbyists. That’s why I decided to build my own capacitance meter under $5. I used a 555 Timer IC to convert capacitance to frequency, and a Raspberry Pi Pico to display the calibrated capacitance in microfarads.
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Supplemental Content:
- Download Code and SVG Files: Episode 580 Resources
Bill of Materials
| Product Name | Manufacturer | Quantity | Buy Kit |
|---|---|---|---|
| RASPBERRY-PI Raspberry Pi Pico Board, RP2040, 32 bit, ARM Cortex-M0+ | RASPBERRY-PI | 1 | Buy Now |
| TEXAS INSTRUMENTS Timer, Single, Precision, 100 kHz, PDIP-8 | TEXAS INSTRUMENTS | 5 | Buy Now |
| MIDAS Alphanumeric LCD, 16 x 2, White on Blue, 3V to 5V, I2C, English, Japanese, Transmissive | MIDAS | 1 | Buy Now |
| MULTICOMP PRO Crocodile Clip, PVC, 1 A, Red | MULTICOMP PRO | 5 | Buy Now |
| MULTICOMP PRO Crocodile Clip, 1 A, Black | MULTICOMP PRO | 5 | Buy Now |
DIY Discrete Logic LED Countdown Timer
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