Recent posts

Linux-based clock radio

An open-source Linux-based clock radio from SpriteMods: Ofcourse, a nice PCB with a powerful processor and a nice display only is scrap without the software: especially in this case, it pretty much defines what the device does. While...
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ESP8266 powered web server + LED control + DHT22 temperature/humidity sensor reading

Martin writes: The ESP8266 System-on-chip (SoC) has recently came out of nowhere and has been taking by storm the IoT DIY world. It is a $4.50 Wi-Fi capable chip that has remarkable specs, obsoleting overnight a number of similar products that are...
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Simple automatic car battery charger

Dilshan Jayakody has published a new build, an automatic car battery charger: This is modified version of commonly available automatic car battery charger system. I obtain original layout of this charger from one of the commercially available...
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Microcontroller based running light controller

Another project by Rajkumar Sharma over at Electronics Lab, a lights effects board using common bulbs: This project provides some lighting effect by the blinking pattern of the bulbs connected at its output. Up to 8 Bulbs can be connected in...
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#FreePCB via Twitter to 2 random RTs

Every Tuesday we give away two coupons for the free PCB drawer via Twitter. This post was announced on Twitter, and in 24 hours we’ll send coupon codes to two random retweeters. Don’t forget there’s free PCBs three times a every...
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Better SPI Bus design in 3 steps

Paul over at Dorkbotpdx has written an article on 3 steps to good SPI Bus design: A much better SPI bus design can prevent conflicts. 3 simple improvements are needed: Use pullup resistors on all chip select signals. Verify tri-state behavior...
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3 tone siren project

Rajkumar Sharma over at Electronics Lab published a new build, a 3 tone siren based on UM3561 IC: 3 Tone Siren project produces Gun Sound, Police Siren and Ambulance Siren effects from a speaker.  This project is built around UM3561 IC driving...
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A Xively logger library for Spark Core

Davide Gironi writes: Xively (formerly Cosm and before that Pachube) is an on-line database service allowing developers to connect sensor-derived data (e.g. energy and environment data from objects, devices & buildings) to the Web and to build...
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Password manager

Sjaak posted pictures of his password manager build in the project log forum: I was frustrated by trying to remember my passwords for all my websites and got even more frustrated when i need to change a password again after some months. Dont...
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App note: LCD fundamentals and the LCD driver module of 8-Bit PIC microcontrollers

An app note going back to LCD display basics from Microchip. This application note provides an introduction to the basics of LCD: its construction, physics behind its operation, and the different factors affecting its properties and performance. ...
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