357 Frequency Counter SSD1306 OLED

357 : Frequency Counter SSD1306 OLED

Design render
  • Author: Pawel Sitarz (embelon)
  • Description: Simple Frequency Counter displaying result on SSD1306 SPI OLED
  • GitHub repository
  • 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

#InputOutputBidirectional
0clk_x - measured frequency inputOLED nRST
1OLED nVBAT
2OLED nVDC
3OLED nCS
4OLED Data/Command
5OLED CLK
6OLED Data Out
7

Chip location

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