Hacker Camp Shenzhen volume 3: “Reflow” is on! Join us from Thursday December 4 to Saturday December 6, 2014 for fun, food and 3 solid days of market tours in Shenzhen China and beyond. Tickets are available now. Come to the world’s electronics capital and experience Shenzhen like a local hacker. Tour the famous Huaqiangbei […]
Author Archives: DP
Tutorial : Control your launchpad using your voice
Antscran over at the 430h forum posted a how-to on using an Android phone and voice commands to control a MSP430G2553: In this tutorial I will demonstrate a MSP430 voice control over Bluetooth, using a HC06 Bluetooth module. I will be using an Android App I programmed which can be downloaded and installed, the C […]
#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 week: Hate Twitter and Facebook? Free PCB Sunday is the classic PCB giveaway. Catch […]
Building and characterizing a DIY RF power sensor
Kerry Wong writes: For the build, I followed LT’s reference design detailed in the datasheet. For the output filtering, I used a 2.2K/10pF output RC filter to limit the output bandwidth to around 3 MHz. Since we are in the RF realm, board layout becomes much more critical than dealing with sub MHz circuits. But […]
Digitally controlled 2.1 channel analog audio power amplifier
Dilshan Jayakody writes: This article introduces high quality digitally controlled 2.1 channel analog audio power amplifier system. This project is mainly based on TDA7377 AF power amplifier and PIC18F452 8bit microcontroller. Basic features of this receiver are 2 × 6W + 20W audio output power, ±14dB bass and treble controls, fully configurable +35dB bass booster […]
Mini high voltage power supply
Victor8o5 posted detailed instructions of how to make this high voltage power supply. He writes: WARNING: Before you start making anything please take a moment and read this: This circuit is intended to be used for educational and experimental purposes (electrostatic experiences, franklin bell experiment, plasma generation, gas ionization, electronic igniter, testing of insulating materials…) this […]
Test video with Hakko T12, JBC C210 and JBC Microtweezer
sparkybg writes, “HAKKO T12, JBC C210, JBC Microtweezer on my latest universal soldering controller” Via the project log forum.
Free PCB Sunday: Pick your PCB
We go through a lot of prototype PCBs, and end up with lots of extras that we’ll never use. Every Sunday we give away a few PCBs from one of our past or future projects, or a related prototype. Our PCBs are made through Seeed Studio’s Fusion board service. This week two random commenters will […]
App note: Analog-to-Digital conversion using a PIC16C5X/PIC16F5X
PIC16C5X and PIC16F5X microcontroller families are low cost off-the-shelf solution for common analog measurements like voltage and current. Here’s an app note (PDF) from Microchip on how to do A/D conversion on these chips. The converter requires only five external components and is software and hardware configurable for conversion resolutions from six bits up to […]
App note: Bit-Banging the SDI and SQI Modes of Microchip’s 23XX512/23XX1024 Serial SRAMs
Dual Mode(SDI) and Quad Mode(SQI) Serial interface are not common peripherals on many MCU today, Microchip’s app note (PDF) provides an alternative way to communicate with these SRAMs using existing GPIOs pins in bit-bang. This application note explains in detail the recommended usage of the SDI and SQI modes of operation of the Microchip 23XX512/23XX1024 […]
Free PCB coupon via Facebook to 2 random commenters
Every Friday we give away 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 […]
Soldering headers without drilling holes
rampadc shared detailed instructions of how to solder headers without drilling holes: During a moment of weakness and extreme laziness, the idea of soldering a through-hole header as normal SMD components popped up. This method is probably quite old and may had been used by a lot people but since all homemade PCB guides I […]
The LED chasing effect project using Atmel AVR microcontroller
rwb over at Ermicro writes: In this project we are going to use both the Arduino IDE and Atmel AVR Studio to program the AVR ATMega168 microcontroller, therefore you could learn to use these well known Integrated Development Environment (IDE) to program the project.
New design for robot arm: more economical and lighter
A double and triple delta robot by Aad van der Geest: The double delta is a novel design that is lighter, safer and more energy efficient compared to other robotic arms. This is because all three of the actuators are placed at a stationary point in base of the arm. As a result, the arm […]
A breakout board for the Raspberry Pi to learn Python
RPi Board, a board to learn Python with the Raspberry Pi by Jesus Echavarria. He writes: Once I check that all is Ok, it’s time to start programming. There’re a lot of manuals and references over internet of how to start programming in Python. Here I’ll cover the basic examples to start working with the board. […]
#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 week: Hate Twitter and Facebook? Free PCB Sunday is the classic PCB giveaway. Catch […]
Voice modulator project
Rajkumar Sharma over at Electronics Lab writes: Voice Modulator project is designed around HT8950A to provide two special sound effects viz. Vibrato & Robot. This project provides two special effects: vibrato and robot. The vibrato effect is generated by alternating the frequency of an input signal up and down at a rate of 8Hz. The […]
Free PCB Sunday: Pick your PCB
We go through a lot of prototype PCBs, and end up with lots of extras that we’ll never use. Every Sunday we give away a few PCBs from one of our past or future projects, or a related prototype. Our PCBs are made through Seeed Studio’s Fusion board service. This week two random commenters will […]
App note: Using BGA Packages
Space saving BGA packages application note (PDF) from Fairchild Semiconductors. Demanding space and weight requirements of personal computing and portable electronic equipment has led to many innovations in IC packaging. Combining the right interface and logic products with new package technology can have a significant impact on the capabilities and form-factor of the end product. […]
App note: Audible noise reduction techniques for Fairchild Power Switch Applications
Here’s an app note (PDF) from Fairchild Semiconductor on how to solve audible noise problem on their power switch applications. In general, switched mode power supplies do not generate audible noise when they operate at constant ultrasonic frequencies (>20kHz). However, some switched mode power supplies can produce audible noise at certain load conditions. Most Fairchild […]