840 Frequency Counter SSD1306 OLED
840 : Frequency Counter SSD1306 OLED
- Author: Pawel Sitarz (embelon)
- Description: Simple Frequency Counter displaying result on SSD1306 SPI OLED
- GitHub repository
- Open in 3D viewer
- Clock: 1000000 Hz
How it works
Project measures frequency on ui[0] input by counting pulses during 100ms periods. Measured frequency is then displayed on graphical 128x32 pixels OLED display in form of emulated 7-segment display.
How to test
Internal logic needs 1MHz clock (to be generated by RPi Pico)
- Connect PMOD OLED display to see measurement
- Connect unknown frequency signal to be measured to ui[0]
External hardware
Freqquency is displayed on 128x32 OLED display with SSD1306 controller: PMOD OLED
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | clk_x - measured frequency input | OLED nRST | |
| 1 | OLED nVBAT | ||
| 2 | OLED nVDC | ||
| 3 | OLED nCS | ||
| 4 | OLED Data/Command | ||
| 5 | OLED CLK | ||
| 6 | OLED Data Out | ||
| 7 |