Silkscreen PCBs with vinyl stickers and toner transfer

Make DIY silkscreens using vinyl stickers, similar to making PCBs with toner transfer methods: Below I am going to detail the process of making the silkscreen, which is the side of the printed circuit board where we solder the electrical components. We will use the same method, vinyl sticker pcb.

How to Add Custom Ringtones to a Wireless Doorbell

Want your doorbell to play prerecorded messages or tunes? This hack at instructables replaces the original speaker in a wireless doorbell with a 9 volt recording module. Most doorbells just make a simple generic tone. But I thought that it would be fun to modify a door bell so that it has a customizable ringtone. That way […]

How to give your Arduino Ethernet shield wireless capability

Connecting your Arduino to the internet is cool, but it’s even cooler to connect over WiFi. Luca explains how to connect your Arduino Ethernet shield to a cheap WiFi router to give it WiFi access. Sometimes however it could be easier (and maybe cheaper!) to connect an Arduino to the Wi-fi network using your ethernet […]

HOW-TO: Access Bus Pirate v4 on-board I2C EEPROM

Bus Pirate v4 has an on-board 24xx64 8Kbyte data storage chip called an  EEPROM (IC3). It can be used to store various settings and preferences, but cooler, the EEPROM’s I2C interface can be accessed from within the Bus Pirate’s I2C mode. First time users can get familiar with the Bus Pirate without any added components! […]

Another toner transfer circuit board making guide

Sometimes prototyping your boards needs to be done quickly. Etching boards at home is the quickest way to knock up simple designs. There’s tons of ways to do it, one of the most popular is the toner transfer method. A circuit design is laser-printed on glossy paper, then transferred to a clean copper board with […]

How to build a surface mount resistor and capacitor collection

This tutorial shows how to easily, and relatively cheaply, build a nicely organized SMD resistor, and capacitor collection. George likes using connectable tiny storage boxes, and filling them with resistor/capacitor kits from eBay. This is complemented by printing out labels for your storage boxes using the label design files for download. Via Twitter.

Smoke Tester: calculating the INA138 load and sense resistors

Yesterday we presented the Smoke Tester, a board designed to safely power prototypes for the first time and test for shorts. One feature of this design is the current measurement via the INA138 high side current monitoring IC. Below is a small tutorial on how we calculated the sense and load resistors for this IC.

Designing Eagle footprints from mechanical drawings

Adafruit shows how to accurately design footprints in Eagle. The process imports the mechanical drawing into Eagle, and the footprint is traced over this template. It’s best used for mechanical parts – connectors, buttons, jacks, etc – that have complicated footprint designs. You can also check out our guide to building simple footprints in Eagle, […]

Temperature and relative humidity logger with the chipKIT Uno32

Here is another chipKIT Uno32 tutorial on a PC-based temperature, and humidity logger. The examples are simple enough for electronics novices to get started. This project is about building a PC-based temperature and relative humidity logger using the chipKIT Uno32 board and the DHT11 sensor. The project setup requires no additional wires (other than the […]

Web browser Arduino interface tutorial

Luca wrote another tutorial on interfacing the Arduino with a ENC28J60 Ethernet controller. This tutorial covers how to control an Arduino through a web browser. This is his 7th tutorial in the ENC28J60 series, if you are interested in Arduino web interfaces check out the earlier tutorials as well. When I published my first example about using […]

Remote control protocol and modulation basics

Giorgos started a series of tutorials on remote control signals. First one covers common protocols, and IR modulation basics. I will explain some essential and widely used IR protocols including the Phillips RC5/6 and the Sony SIRC protocol. But first of all, there is something very important to explain. Many people tend to confuse the […]

Controlling a camera with the Bus Pirate

Hacromatic posted a tutorial on interfacing an Arduino camera module with the Bus Pirate: The Bus Pirate from Dangerous Prototypes is one of my favorite debugging tools. It’s a really handy gadget for probing and poking around on various communications buses to get an understanding of how to interface to new chips or devices. It […]

SketchUp tip: How to make 3D previews

Squonk shared a small tutorial on how to make ‘3D Warehouse‘-like previews for your SketchUp 3D Models. It involves installing and using the SketchUp Web Exporter plugin: This tool will create in the given directory a collection of JPEG pictures and an HTML file containing the JavaScript code to animate the panorama, as well as […]

Eagle Monday: Easier way to make parts in Eagle

Chuck wrote to us with a short tutorial on a simpler way to make footprints in Cadsoft Eagle. See our tutorial here. Hello, my name is Chuck and I’ve been following your site for several months now. I was reading through the Eagle “How to make parts” tutorial and noticed you guys are making the […]