ProMini clock shield with OLED display

Yet another ProMini clock shield kit, this time featuring a 128x64 I2C OLED display.


The kit can be purchased with or without the OLED display (I prefer you buy the OLED on your own, for example this excellent one from miker).

  US$30, includes OLED display, free shipping to North America

  US$16, OLED not included, free shipping to North America

The kit includes:
  • PCB
  • DS1307 SMD
  • 32kHz crystal
  • CR1220 coin battery
  • battery holder
  • optional: I2C 128x64 OLED display (blue or white)
  • tactile switch (2x)
  • resistor 10k (2x)
  • machined male pins


The PCB was designed to accommodate I2C OLED displays with the 4-pin header configured either as VCC-GND-SDA-SCL or as VCC-GND-SCL-SDA.

The OLED clock can also be powered from the same LiPo battery shield for ProMini, as used in the bubble clock. To minimize current consumption (beside disabling the ProMini on-board LEDs), the processor can be awaken from sleep at the push of the "hours" button (on D3).

Schematic and board layout are shown below.



The OLED clock could show the time in many different ways, including Pong mode (sketch adapted from miker), analog clock mode, digital clock mode (sample sketches to be provided soon).

Comments

Post a Comment

Popular posts from this blog

Read analog input of Arduino Due board

Image
The Arduino Due Board has 12 analog inputs (pins from A0 to A11), each of which can provide 12 bits of resolution (i.e. 4096 different values). By default, the resolution of the readings is set at 10 bits, for compatibility with other Arduino boards. It is possible to change the resolution of the ADC with analogReadResolution(). The Due’s analog inputs pins measure from ground to a maximum value of 3.3V. Applying more then 3.3V on the Due’s pins will damage the SAM3X chip. The analogReference() function is ignored on the Due. Analog input pins on Arduino Due Board Example to read from Analog Input: int analogInputA0 = A0; int varA0; void setup() { Serial.begin(9600); analogReadResolution(12); //set ADC resolution to 12 bits } void loop() { varA0 = analogRead(analogInputA0); //read ADC input Serial.println(varA0, HEX); //print as HEX delay(1000); } Read Analog Input on Arduino Due If the code compiled with error: 'analogReadResolution' was not declared in t
Read more

Application Note of Cortex-M3 Embedded Software Development

Image
The Arduino Due is a microcontroller board based on the Atmel SAM3X8E ARM Cortex-M3 CPU (datasheet). It is the first Arduino board based on a 32-bit ARM core microcontroller. The Application Note 179 Cortex™-M3 Embedded Software Development , from ARM Information Center, introduces the main features of the ARM Cortex™-M3 processor and describes different aspects of developing software for it. It also covers the migration of existing ARM projects to the Cortex-M3 platform. PDF version available at the bottom of the page. Application Note of Cortex-M3 Embedded Software Development Table of Contents 1. The Cortex™-M3 1.1. Nested Vectored Interrupt Controller (NVIC) 1.2. Memory Protection Unit (MPU) 1.3. Debug Access Port (DAP) 1.4. Memory map 2. Developing software for Cortex-M3 2.1. Exception handling 2.2. Memory Protection Unit (MPU) 2.3. Stack and heap configuration 2.4. Instruction set support 2.5. Bit-banding 2.6. Execution Modes 2.7. Supervisor Calls (SVC) 2.8. System Timer (SysTick
Read more