Below is the schematic that shows how the IC is wired to the ATMEGA328 microcontroller and the 4 digit 7-segment display with comon cathode. Besides the MAX7219 you need only three other external components: two capacitors and one resistor. The capacitors are here to reduce noise signals and cannot be ommited. The resistor is used …
Recapitulation One thing I didn’t find clearly over the internet is how to make an Arduino Pro Mini bare bones, that is, from the scratch, and how to make one on the breadboard. This is really useful if you want to make a custom pcb/smd circuit, because you will be able to test your hardware …
How to make an Arduino Pro Mini bare bones with Real-time Clock Using Atmega Read More »
301 LED Analog Clock Project Schema Files of PCB and C51 Compiler Source Code has been prepared by the C-in hex The clock circuit is made of 301 LEDs with a diameter of 3mm… Electronics Projects, Analog LED Clock Circuit AT89C2051P “avr project, led projects, microcontroller projects, “ 301 LED Analog Clock Project Schema Files of PCB and C51 …
ANALOG LED CLOCK CIRCUIT AT89C2051P USING ATMEGA Read More »
A while back I picked up a Spark Fun 128×64 LCD and an Ada fruit 66-channel GPS module to have a go at making a GPS clock. The great thing about setting the time and date via GPS is that I won’t have to put any buttons on the clock. It’ll set itself, and appear …
GPS Clock Assembly, Part III January 10, 2015 Filed in: GPS | Arduino | Electronics | Clocks | Laser Cutting Pinoco was hit with the holiday rush, so it took a few extra weeks to get my new batch of laser cut acrylic. I nailed it this time. Right away I could tell the engraving …
A time has come for me to say ‘hello’ to the mid-XX century technology of Neon numerical displays, also known as Nixie tubes. Despite being quite hard to obtain and utilize I’ve decided to make a nice looking clock which (hopefully) would make a perfect Christmas present, and since the Christmas is all about sharing …
In this instructable you’ll learn how to use a rotary encoder (see http://en.wikipedia.org/wiki/Rotary_encoder ) with a microcontroller and how to display the numeric value as a bar and a numeric value on an OLED display. See the video below for the project …
Using a Quadrature Encoder With an ATtiny 2313 and an OLED Display Read More »
While I waited for the Mini 7-Segment Clock v3 PCBs to arrive, I got to work on designing an enclosure. First, I exported the PCB from EAGLE to Sketch Up. I then assembled a complete 3D model with all the necessary components. With the 3D model complete, I could then design an enclosure to house …
The time keeping is provided by DS3231 RTC chip with an integrated high accuracy (± 5ppm) MEMS crystal. This makes PCB design very simple, as one does not need to take care on special traces design around the crystal. The chip is powered via the VBAT pin with VCC pin being grounded. This way its …
Based on the Atmel ATtiny12L-4PI microcontroller -A real Time Clock/Calendar for less than US$1.50 in moderate quantity. This is the timekeeping test circuit. It includes a one-transistor circuit to switch in the 5V power supply when present and drop back to the 3v battery the rest of the time. That loop of blue wire-wrapping wire …
