A message recording board capable of recording 120 secs of audio by Rajkumar Sharma over at Electronics Lab: This project is designed around ISD25120 which can store 120 Seconds audio. Recording and playback operations are controlled with tact switches. The kit has an onboard microphone and LED to indicate the functions of Play and Recording. IC has […]
Category Archives: DIY
Dirty DIY stencils
Matt Mets of Blinkinlabs shared a tutorial on making solder paste stencils quickly by hand: This is a truly quick and dirty method for making solder masks, and is nice because it only requires a few hand tools. It’s great for situations when you want to test a new design or make a single, small […]
Guitar booster pedal (MPX-1)
Bastl3r wrote this instructable detailing the build of his guitar booster pedal project: I chose an overdrive pedal design off of generalguitargadets.com (Schematic) and modified it like this: added a simple positive/middle/negative supply added a noise filter I found on beavisaudio.com right after the DC Jack (Huminator) took away the clipping diodes on the output connected […]
Proximity sensing LEDs
Here’s a proximity-sensing LEDs project by Will_W_76. He writes a complete step-by-step instructions here: So how does this all work? What makes it proximity-sensing? Remember in the explanation above that the photo-transistor acts like a switch. So when the photo-transistor is off, no current is flowing across it to our blue LED and the LED […]
DIY 60W adjustable electrical load
A DIY 60W adjustable electrical load project from Electro-Labs: In this project, we are building a useful board which should take place on your bench. It is an adjustable electrical load which can sink up to 5A @ 60W continuously. This board will come to aid when you need to draw an exact amount of current […]
Teensy MIDI USB foot controller for controlling Mobius Looper
Thrifleganger wrote this instructable detailing his Teensy MIDI USB foot controller for controlling Mobius Looper: The concept is quite simple and straightforward. You press a button, the arduino interprets the signal arriving from the button as a midi “control change” signal (typically represented as MIDI CC), and this signal can be mapped to respond to any of […]
DIY Delta-3D printer
Vegardpaulsen posted pictures of his DIY Delta-3d printer build: I have had my trusty Makerbot Thing-o-matic 3d printer for over 3 years, and its time to move on to a bigger, better one, as the cost of buing spareparts on the old one gets higher every day. The trouble of repairing the Makerbot all the time vs […]
Mini MAME cabinet
Greg Kennedy shows you how to make a DIY MAME cabinet project: I started this project by taking stock of my components. Like any good hacker, I have a stack of spare PCs and monitors for occasions like this. I selected a set that was particularly hard to repurpose, due to its crappy CPU, use of […]
Go analog with a resistance-based calculator
tanishqjain340 wrote this instructable detailing the build of his analog calculator project: Do simple calculations with your math box. The next time you need to crunch a couple of numbers, resist the urge to grab a digital calculator. Instead, round up some variable resistors, also known as potentiometers, and wire them into an analog mathematics rig. By twisting […]
DIY binary wrist watch
Elia wrote an article detailing his binary wrist watch project: I have just finished my binary wrist watch project (well, the new revision anyway). I was surprised at how small I was able to make it compared to last time. I chose to go with the “super-yellow” color LEDs as they fit the purple OSHpark PCB very […]
Op-Amp based linear regulators
Warren Young of Tangentsoft writes: Experienced audio DIYers are familiar with monolithic linear regulators like the 78xx series and the LM317. Here’s a simplified block diagram of a standard linear regulator, from National Semiconductor’s Application Note 1148 Let’s see… We have an op-amp, a couple of transistors, a voltage reference, and a few resistors. Can we […]
DIY stroboscope
ReturnZero published a stroboscope build: At its heart, a stroboscope is just a rectangular wave generator hooked up to a light source. I wanted a few extra features to make it nice to use: Ability to set flash rate by either frequency or RPM Set duty cycle of output without affecting flash rate LCD display […]
Adding speech to your Embedded project
SkinnySatan writes: I had this one project where the device was supposed to speak out the output. And I was too Lazy to actually go and build a PC based application and not that lazy to make it on a micro controller. So here is some of my research where i am gonna show you […]
DIY Binary clock in an old hard drive shell
x2Jiggy wrote a post on his blog detailing the build of his DIY binary clock: This clock uses a minimalist design constructed in the shell of an old hard drive. A DS1307 Real Time Clock (RTC) module keeps accurate time while an ATMega328 (with Arduino bootloader) microcontroller determines which LEDs should be lit to display the current […]
Beach Buddy, a 3-in-1 solar phone charger, boombox, and sunburn timer calculator
An all-in-one, water and sand resistant, solar charger, audio speaker system, and sunburn timer calculator by starwisher. Check out the project’s instructables page here: This Instructable harnesses the power of Arduino, a UV sensor, and simple mathematics to make one nifty gadget sure to boost your outdoor summer fun – and minimize your indoor summer recovery!
DIY automatic water timer
Kyle wrote an article detailing his DIY automatic water timer: Now that I have power and output figured out, I need to work on the control aspect. 555 timers are great for simple applications requiring up to a few minutes of delay. At 10 minutes, the RC values needed would boarder the danger zone of the timer not functioning […]
Simple temperature control system
A simple temperature control system for 3D print or other constant temperature control purpose by Xiang: I plan to build a home-made 3D printer controlled by my Raspberry Pi, which, unfortunately, does not have any analog data acquisition pin. Therefore I decide to build a stand-alone temperature control system. The idea is very simple. I use […]
LiPo Booster, a breadboard-friendly boost converter board based on TPS61230
Jianan Li made this LiPo Booster project, that is available at Github: LiPo Booster is a breadboard-friendly boost converter board based on the TPS61230 IC from Texus Instrument. It has an output voltage of 5V, and is designed to be used with a single cell LiPo battery.
Electric Imp – Weather display
Wardy posted his simple weather forecast display: Found a much better use for the 2049 board – a simple, cheap weather forecast display… This picture shows an Electric Imp device delivering a 4×4 pixel image to the 2049 board from a server on the west coast of the USA… The 4×4 pixel image itself is simply […]
Mini line tracer
Pinomelean wrote this instructable detailing the build of his analog line tracer robot driven by a dual op-amp chip: It’s a simple line tracer, controlled by two op-amps. No microcontroller, no programming… simple analog circuitry. I tried to make it as small as possible, using SMD components and tiny motors. I’m very happy with the final […]