@mattbrailsford tweeted his DIY bench power supply. You can get one for $14 at Seeed Studio.
Author Archives: DP
Open source STM32 vehicle tracker
X89300 shared his STM32 car tracker project, that is available at Github: Features: STM32 48/64 pins (F10X, F20X, F40X, L151) GSM Telit GL685/GL868 GPS/GLONASS SL868/SL869 Accelerometer MMA7455 CAN bus (need MCU with CAN support) 2 input, 1 output signal Standard SIM or SimOnChip Only for 48 pins version Side connector for extension pcb Only for 64 pins […]
BGA chips: remove, reball, replace the easy way
By ian Today we previewed the Hacker Camp Shenzhen advanced soldering class to prepare translations and figure out how everything will work. Its way, way better than we had hoped. In three hours we learned how to remove, reball, and replace a BGA chip. A couple of us did two. No special BGA reballing tools […]
Playing WAV sound files with Arduino
This Instructable by Husham demonstrates a simple circuit to play wav files using Arduino Nano V3.0: This is a simple circuit to play wav files using arduino Nano V3.0, it consist from 4 buttons ,each one play specific wav file loaded to SD card. Via Embedded Lab.
Open Electronics: Contest 3Drag/K8200
Open Electronics is launching a new contest for people who bought the printer 3Drag or K8200: Thus here is this 3Drag Competition, reserved for those who possess a 3Drag or a Velleman K8200 3D printer (based on the same design). Nowadays it’s plenty of this machines: in fact, thanks to the collaboration with Velleman, the […]
Thermostat V1.0
Haris writes about his digital Thermostat project: In the need of my new homemade energy saving fireplace (which boils water for the radiator) i designed and built a digital thermostat. The idea to design my own thermostat came when i came across with the following problem. When i first fire the fireplace the water in the […]
Mini-Circuits USB power sensor review
Mini-Circuits USB power sensor review by KF5OBS Quick and brief look at the Mini-Circuits PWR-SEN-4RMS USB power sensor. It can measure the power of modulated and unmodulated signals between 50 MHz – 4000 MHz. The measurable power range is from -35 dBm to +20 dBm (100 mW).
#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 […]
Conversion programmer in TL866cs TL866A
radioman wrote a small utility which generates the full TL866A firmware, based on custom serial: For the uninitiated, the programmer TL866 (MiniPro) is one of the programmers Bestsellers in recent times among the best de-bricker/makers. It’s a small device that allows programming of a large number of memories (ROM / FLASH / NVRAM) and microcontrollers (MCU […]
USB Wrapper project
scasagrande has designed this USB wrapper project, that is available at Github: Have you ever wanted to charge your smartphone by using your computer, but you didn’t want all of your sync software to load? Maybe you want to use a friend’s computer but you don’t really want Windows to start trying to install drivers and for your […]
Arduino based Z Axis laser cutter controller
An Arduino based Z Axis laser cutter controller by Martin Raynsford The user pad has 4 buttons, one fast and one slow in either direction. If you push fast and slow at the same time the Z axis will datum in that direction, because the Z axis control system is now independent of the laser controller […]
Extending DAC resolution using digital potentiometer
Kerry Wong writes: One way to extend the resolution of a digital-to-analog converter (DAC) is by employing a sigma-delta converter in software. The main disadvantage of such approach is the slow speed. Alternatively, we can use some extra hardware to extend the usable resolution of a DAC. In this post, I will illustrate one such […]
Getting a data SIM card in Shenzhen
By ian Mobile data is key in China. Access to Google Maps, translation, and other info makes life so much easier. Mobile phone SIM cards with data plans are cheap and easy to get. Until recently you could buy them anywhere, but now you need to head to a phone shop and show a passport. […]
ATmega169 base 8bit Arithmetic and logic unit
ATmega169 base 8bit Arithmetic and logic unit, an open source software project by Dilshan Jayakody: ALU (Arithmetic and Logic Unit) is a digital system that performs integer arithmetic and logical operations. In this post we introduce ATmega169 base ALU simulation using Proteus. This is 8bit ALU, and functionally it is similar to other entry level ALUs […]
Battery powered LED Matrix clock project
cburns shared his LED Matrix clock in the project log forum: My latest electronic project, the LEDC which is a LED Matrix clock. It’s the size of a standard business-card, and battery powered. I wanted something that would sit on the desk and I thought, why not use business card holder? It works great, and it’s […]
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: Measuring mains power consumption with the STM32x and STPM01
Power consumption measurement using an STM32 micro and the STPM01 power metering IC. App note can be found here This document describes a software and hardware solution concerning the STM32x microcontroller and the STPM01 power meter for measuring mains power consumption and also provides hardware and firmware guidelines to interface the STPM01 with the STM32x […]
App note: Audio and waveform generation using the DAC in STM32 microcontroller families
App note on utilizing the built-in DAC on your STM32 micro. This application note gives examples for generating audio output signals using the Digital to Analog Converter (DAC) peripheral embedded in the STM32F10xx microcontroller family. The STM32 DAC module is a 12-bit word converter, with two output channels for supporting stereo audio. The DAC can […]
Last minute chance to join us at soldering school this week!
By ian If you didn’t get a ticket to Hacker Camp Shenzhen there’s still a chance to join us at the mobile phone repair school this week. A few people are going to check it out and prepare the translations. This will be the full week-long course, not the abbreviated 2 session version used during […]
App note: Modbus TCP for the Microchip TCP/IP Stack
Here’s another application note from Microchip – Modbus TCP for the Microchip TCP/IP Stack (PDF!) Modbus® is an industrial Transmission Control Protocol (TCP) used for remote monitoring and control applications. This application note describes a basic Modbus TCP server implementation and how it can be extended in a Modbus application. The application software that accompanies this document […]