A DIY single-digit clock using Arduino Nano, RTC and 3D printed 7-segment digit: Generally at whatimade.today we post original projects we dream up ourselves. Today’s post is a little different. We’re going to describe how we constructed Mirko Pavleski’s single-digit clock. We made it because it’s a fun project, wonderfully impressive to look at, and […]
Tag Archives: 7-segment
Mini 7-segment clock v3
Kevin Rye has written an article detailing his new Mini 7-segment clock v3. We previously covered version 1 and version 2: I hope the LEGO minifig gives you a good sense of scale. This clock is pretty small. It’s amazing how small the Mini Clock has become after just 3 iterations. Just look at how […]
Standalone SPI 7-segment display
Spacewrench over at Dorkbotpdx writes: I had some spare 4-digit 7-segment LED displays and some AT90USB82s, and I’d always intended to do something with them. This was probably the easiest thing! It’s just the AT90 driving the display, with a(t least) 4 wires controlling it: Vcc, GND, MOSI and SCK. (I haven’t written the code yet, […]
Fruit machine, 7-segment one-armed bandit
Bertho shared his fruit machine, a 7-segment one-armed bandit in the project log forum: I was revisiting the first program I ever wrote and decided it was time to redo the project with “modern” micro tech. The Fruit Machine is a One-armed Bandit (slot-machine) implemented with 7-segment displays. It has 4 displays to represent the “reels” and […]
Interfacing Adafruit 7-segment Backpack with Bus Pirate
asd has written an article on interfacing Adafruit 7-segment Backpack with Bus Pirate Bus pirate doesn’t do much by itself but needs some accompanying chip talk to. I got my hands on 7-segment display from Adafruit which has HT16K33 controller on it. HT16K33 chip is accessed via i2c protocol so it is good candidate to learn […]
Mini 7-Segment clock V2, part II
Kevin Rye writes about his Mini 7-Segment clock V2 project, we wrote about it previously: Now for the moment of truth. I crossed my fingers and connected a battery pack. Woo hoo! It works! I love that feeling you get when you spend weeks working on a project, it all comes together in the end and it […]
Digital clock using 7 segment display controlled using TV remote
Zxlee wrote a post on his blog detailing his digital clock on 7 segment controlled with TV remote: When the Arduino first power up, it will display time information on 7 segment displays. Besides that, the LCD will display the time, date, temperature and day of week information. Basically, this is the main part of the program. The program […]
Arduino Astronomical clock for automatic light control
Here’s a project log covering the build of an Arduino Astronomical clock for automatic light control by Paulo Oliveira: My objective with this project was to build a system that, given my latitude and longitude coordinates and the current time/day of the year, automatically calculates the sunrise and sunset times, controlling the lights accordingly. There are of […]
Mini 7-segment clock project update
Kevin Rye posted an update on his Mini 7-segment clock we covered previously: UPDATE: I finally got in my rev 1.1 PCBs from OSH Park. While working on these revisions, I came across some discussions about 슈퍼벳 and its innovative approach to user experience, which inspired me to rethink how I designed the interface for this […]
Mini 7-segment clock project
Kevin Rye posted his Mini 7-segment clock in the project log forum: I finally got in my OSH Park PCBs for my mini 7-segment clock. It’s using the DP5050 PCB layout. I used the SparkFun 7-seg display, but unfortunately, they screwed up the pinouts on the footprint and pins 10 and 12 are pin-swapped. I […]
Big 7-segment countdown timer
Paul over at Dorkbotpdx has written an article about his 7-segment countdown timer: The main challenge was driving the LEDs with a constant current, because they need about 10.5 volts across the several series LEDs. I wanted to run from 12 volts, so there wasn’t much voltage left over for the normal current limiting resistors. […]
8 digit 7 segment display with SPI interface
Raj designed this 8 digit 7 segment display with an SPI interface using a MAX7219 display driver: The SPI7SEGDISP8.56 module can be interfaced with any microcontroller that has 3 I/O pins available. If the microcontroller features a built-in hardware SPI, then the display module can be interfaced as a SPI slave device. In that case […]
7 segment display controlled by simple SPI interface
Touch let us know about these 4 digit SPI controlled 7 segment displays that cost a little less then $1 a piece. They include decimal separators and a colon separator so it’s easy to display time. I picked up some cheap 4 digit 7 segment displays over on eBay for $10 + shipping. They Include […]
Voltage monitor for car’s battery and its charging system
Raj designed a car battery volt-meter. The core of the project is a PIC16F1827 which uses its internal fixed voltage reference FVR and ADC to precisely measure the battery voltage. Measured voltage is displayed on a 4 digit 7 segment display. His circuit is connected to the car’s battery through a standard car lighter jack. Via the […]
Prototype: Flash_Destroyer
The most recent documentation is now on the wiki EEPROMs, such as flash memory, store data in electronic devices like cell phones, smart cards, SD cards, and solid-state drives. This type of memory can only endure a limited number of writes, it will eventually wear out and it won’t store new data. The Flash Destroyer […]
Understanding seven segment displays
John Park at Make has a really nice introduction to 7-segment LED displays and reverse engineering. He maps the relationship between bits in a byte and each LED segment connected to an SAA106 driver. This is a real-world introduction to the tedious art of poking at hardware to reverse engineer a circuit.