Posts Tagged ‘7-segment’

Mini 7-segment clock v3

Monday, June 29th, 2015

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...

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Posted in clock | 3 Comments »

Standalone SPI 7-segment display

Friday, August 8th, 2014

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...

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Posted in LEDs | No Comments »

Fruit machine, 7-segment one-armed bandit

Thursday, June 26th, 2014

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...

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Posted in project logs | 1 Comment »

Interfacing Adafruit 7-segment Backpack with Bus Pirate

Tuesday, March 4th, 2014

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...

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Posted in Bus Pirate | 1 Comment »

Mini 7-Segment clock V2, part II

Wednesday, February 12th, 2014

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...

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Posted in Arduino, clock | No Comments »

Digital clock using 7 segment display controlled using TV remote

Thursday, January 23rd, 2014

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...

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Posted in Arduino, clock | 1 Comment »

Arduino Astronomical clock for automatic light control

Wednesday, November 20th, 2013

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...

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Posted in Arduino | 2 Comments »

Mini 7-segment clock project update

Tuesday, August 6th, 2013

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. I fixed the pin-swap problem with the display as well as rerouted Vcc to the Atmega a little better than before. Rev 1.0 was a little...

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Posted in clock, project logs | No Comments »

Mini 7-segment clock project

Tuesday, June 25th, 2013

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...

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Posted in project logs | 3 Comments »

Big 7-segment countdown timer

Monday, March 25th, 2013

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...

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Posted in DIY, LEDs | 2 Comments »

8 digit 7 segment display with SPI interface

Wednesday, January 9th, 2013

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...

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Posted in Arduino, LEDs | 10 Comments »

7 segment display controlled by simple SPI interface

Monday, September 17th, 2012

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...

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Posted in parts | 6 Comments »

Voltage monitor for car’s battery and its charging system

Tuesday, October 11th, 2011

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...

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Posted in hacks | 2 Comments »

Prototype: Flash_Destroyer

Tuesday, May 25th, 2010

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...

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Posted in Flash Destroyer, Prototypes | 29 Comments »

Understanding seven segment displays

Tuesday, April 27th, 2010

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...

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Posted in skills | 2 Comments »

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