Kevin Rye built this E-Paper clock and wrote a detailed explanation on his blog describing the build: I still have to put the finishing touches on the code. Instead of having the display constantly update, I’d like to set an alarm on the DS3231 RTC to go off once a minute, and only update the […]
Category Archives: project logs
Flipdot fun project
Bertho shared his flipdot project in the forum: For those of you who don’t know flipdots, these are mechanical discs (black/white or black/color) that flip with a (semi-)permanent magnet which can be polarized in either direction. A large current must be applied to a coil to flip the magnetic field and the disc will flip. […]
Universal digital timer based on MSP430
SUF shared his new project the universal digital timer based on MSP430 in the project log forum: I have an oven and a deep fryer at home. Both has the same type of digital timer in it. The timer has a two digit 7 segment display and two buttons with one drawback. It only beep […]
Project-a-week: Peweem
Here’s another project by Mats the Peweem: … Peweem – a small unit for to be put on a solderless breadboard to generate 0-100% PWM signals at various frequencies, it can also measure the duty cycle of incoming signals.
VFD filament driver using 555
Kerry Wong documented his VFD filament driver built: I recently salvaged a vacuum fluorescent display (VFD) from a piece of old test gear. The VFD is a 13 digit 7-segment multiplexed display and I thought it would look great in a custom digital clock or something similar. While it has the model number FUTABA 13-MT-54NA, […]
Nomech mini, a 4×4 capacitive touch button grid
Kasbah posted his Nomech mini project, a 4×4 projected capactive touch board using Atmega32u4 and back-fire LEDs for each button in the project log forum: It fits SoB 100x80mm but the top acrylic will sit right on top of the PCB as the dielectric properties of whatever is touching the electrodes matters a lot. If […]
Educational BoosterPack 8 bit FFT spectrum analyzer
SimpleAVR over at the 430h forum shows off his Educational BoosterPack 8 bit FFT Spectrum Analyzer project: SimpleAVR comes up with unique Launchpad projects. These include his wire clock and spectrum analyzer projects. This time he wired the CircuitCo Educational BoosterPack to a Launchpad to sample audio and have the LCD display a spectrum. Via […]
Cheap frequency counter based on MSP430
SUF posted a cheap frequency counter based on MSP430 in the project log forum. Here is the properties of the project: – Cheap: The component total should be below $5 – Using TI’s MSP430 line of MCUs what I’m learning now – Able to measure till 10MHz – Using LED display – Able to calibrate – […]
BLiVIT case
Asgard posted pictures of his BLiVIT case we covered earlier.
Blingtag project
Mats posted the new version of his old project, the Blingtag: I wanted to redo an old project and convert it from SMD to “surface mounted thru hole parts” with the extra twist of having the parts *inside* the PCB.
AVR programmer on PIC
Jaromir shared his AVR programmer in the forum: Just from pure passion to see how low-end PIC exercises AVR, I made this programmer. Basically it is STK500 port on PIC16F1825. I took this tuxgraphics.org one, did some clean-up, wrote new hardware layer for PIC16 and voila – new programmer is born. It was done in […]
BatLev, a LiFePo4 cell balancer
Blarson posted his project the BatLev, a LiFePo4 cell balancer in the project log forum: Lithium Feric Phosphate cells are a lower engergy density variety of lithium-ion cells that don’t have the fire hazard and short life problems of the more common li-ion cells. They are popular for electric vehicles and are gradually making their […]
Homemade LED wristwatch
Montspy was inspired by Mats’ DaTajm wristwatch so he made his own, the LED wristwatch: It has 12 red LEDs to display hours and slices of 5 minutes. And 4 orange LEDs to obtain a minute-precision display. Check out the video after the break. Via the forum.
PCB a Week 10: Trifluxx
Mats continues his challenge of designing one PCB every week. In week 10 he came up with Trifluxx, a triangular PCB game: I ended up with using resistor arrays instead of discrete 0805 resistors to save some space and the board can be used for both a sound reactive flasher or some kind of a 1/2/3-player game […]
Simple component size and silkscreen reference board
Philip posted his simple component size and silkscreen reference board in the project log forum: since I kept checking old projects to figure out which silkscreens worked, and which didn’t, I made myself a simple reference board. I also included some common SMD component sizes, just to keep me from thinking 0402 was a viable […]
TL-WR703N, TL-WR720N & TL-MR3020 images + secret sauce
Madox uploaded several firmware images for the TL-WR703N, TL-WR720N & TL-MR3020, get them from the Madox Google Code page: Based on OpenWRT r36503, it has the new 3.8.10 kernel as well as the new LuCi theme. Due to the slowly expanding size of the kernel and the packages, I had to drop 3G out from […]
uFusion – AHRS/IMU module
uFusion – AHRS/IMU module on Indiegogo: uFusion is an easy configurable 9DoF AHRS system that mix data coming from 3 axes accelerometer, 3 axes gyroscope, 3 axes magnetometer to extract Attitude and Heading References. It’s studied to simplify the integration in your project. In fact, uFusion can be soldered on your own PCB or can […]
BLiVIT case design
Asgard posted a case design for the BLiVIT project we covered earlier: This photo is a rendering of the new case design for the BLiVIT. It should have enough vertical clearance for the entire BLiVIT maximum assembly, that being the BLiVIT board, the P01-114 POQiRX transmitter daughter board, the Li+ cell, and the POQiRX transmitter coil […]
ATmega 644 based VGA adapter
Ryan Fanelli and David Hartino, students in Cornell University’s Electrical and Computer Engineering program, have written a detailed explanation of their ATmega 644 based VGA adapter. The pair developed this “homemade video card” as their final project in the program, pushing the envelope on MCU clock cycle optimization using only a handful of TTL logic […]
Quadcopter in a 5x5cm PCB update
Erdabyz posted an update to his Quadcopter in a 5x5cm PCB we covered previously: For now, Invensense’s MotionApps firmware has been succesfully ported to PIC32, and we have the MPU6050’s DMP outputting a quaternion at 200Hz and the output looks perfectly valid. Some freescale code for the barometer/altimeter has also been ported but it’s still […]