Author Archives: DP

Turning the Freedom board into a Logic Analyzer

Erich Styger of MCUonEclipse writes: I think the most important tool for a firmware engineer is a Logic Analyzer. I always have one on my desk. Working in different locations, sometimes I forget to carry it with me. And for sure I would need it. To buy another one to compensate my laziness? Or maybe […]

Digital audio amplifier with PLL synthesized FM radio

Another open source hardware project by Dilshan Jayakody the digital audio amplifier with PLL synthesized FM radio: This is high quality stereo digital audio amplifier with PLL synthesized FM radio receiver. Some of the high level specifications of this receiver are listed in below: Audio output power: 4W + 4W (with 8ohm speakers) Input sources: FM and 3 […]

Drum light trigger that uses leds, a NE555 timer and a piezo transducer

Davide Gironi writes: This circuit is a Drum Light Trigger. It uses a piezo transducer that reacts to drum vibration, and a NE555 timer to setup the light time. There are two trimmer pot, one to setup the sensibility of the vibration, the other to set how long the LED light will be active. This […]

Read serial data without PC on GLCD

Hemal Chevli wrote an article detailing his new tool the GLCDTerm that reads serial data without PC on GLCD: I’m calling it GLCDTerm(spin-off from GTKTerm), this handy tool reads TTL serial data and displays it on GLCD. This is the first time I’ve used a GLCD in any of my projects. It runs on m328 using arduino bootloaer and the […]

USB to Serial converter using AVR microcontroller

Yet another great project by Dr. Ayman Shalaby of Electronics Lab, a USB to Serial converter using an ATMEL AVR microcontroller: This project is a USB to Serial converter using an ATMEL AVR microcontroller. There are two version of the converter, one with SMD parts and another with TH parts. The mcu used is an ATmega8 and […]

DIY prototyping board with 3.3V, 5V, 12V and -12V built in power supplies

Electro Labs’ new project the DIY prototyping board with 3.3V, 5V, 12V and -12V built in power supplies: This DIY Prototyping Board is designed to provide all the most used supply voltages that a designer will need during prototyping a circuit. The switching power supplies on the board output 3.3V, 5V, 12V and -12V rated at […]

app note: Isolating I2C interfaces

an I2C isolation solution from Analog Devices, app note can be found here. The Inter-Integrated Circuit (I2C®) bus is a two-wire bidirectional bus used for low speed, short-distance communication between integrated circuits. Developed by Philips 1980 in the early 1980s for use amongst ICs on a single board, I2C today is increasingly being used in […]

app note: Generic data transfer using USB HID

Here’s an app note from Nordic Semiconductor on using nRF24LU1+ USB HID communication. The Universal Serial Bus is the de factor inustry standard for the connection of computer peripherals, with approximately two billion sold devices every year. The success of USB is in large part due to its end product ease of use. However, such […]

9V to 48V DC-DC converter

Konstantin Dimitrov over at Electronics Lab writes: This project is a 8-12Vdc to +48Vdc DC-DC converter based on MC34063 switching regulator. It’s a simple project of a DC-DC converter to make a phantom power supply for professional microphones. It can deliver 15-20mA at 48VDC. It ‘s based on MC34063 DC-DC step-up, step-down and boost converter. […]

Free PCB coupon via Facebook to 2 random commenters

Every Friday we giveaway some extra PCBs via Facebook. This post was announced on Facebook, and on Monday we’ll send coupon codes to two random commenters. More PCBs via Twitter on Tuesday and the blog every Sunday. Don’t forget there’s free PCBs three times every week: Free PCB Sunday. The classic. Every week, get free […]

Chipstomp assembly – Analogue side

We previously covered Catmacey’s Chipstomp digital side. Now he built the Chipstomp’s analogue side: It’s done.  I’ve assembled the analogue side of the Chipstomp and finally have a fully working device.  There were no errors to fix this time which was a nice surprise.  Just lots of fiddly 0805 surface mount components to place. Check out the video after […]

0-30V laboratory power supply

Hare’s the 0-30V laboratory power supply project by Arief Laksono of Electronics Lab: This project is based on the 0-30 VDC Stabilized Power Supply with Current Control 0.002-3 A and a new PCB layout is introduced here. It’s a stabilized power supply with variable output voltage in the range 0-30Vdc (33Vdc peak) – and variable current 3A and […]

Multitask scheduler for MSP430F5529 launchpad

In this video Jeffrey Antony demonstrates his multitask scheduler for MSP430F5529 launchpad: I have checked in the code to my github repo. Its an completely open source scheduler. Feel free to use it and learn more. I have made the code self explanatory. Enjoy! There are three tasks – first task for blinking the red LED […]

Mini Quad – build a FPV250 mini-H quadcopter

Oscar Liang built a  FPV250 mini-H quadcopter and wrote a post on his blog detailing it’s assembly: Having built a mini quad before running on 2S, although it was very easy to control and stable, I was not particularly happy with the power. I cannot fly too fast, neither doing flips and acrobatics. This time I will be using […]