Topward 6603A Linear Power Supply Teardown
I bought a used Topward 6603A lab power supply from eBay a couple of weeks ago and thought I would do a quick review and teardown and perform some basic measurements to see how well it was built.
Author: kwong
Advanced Slave Camera Flash Controller
Simple slave camera flash (or synchronous flash, like this one I built earlier) works great with older film cameras, but does not work with modern digital cameras. This is due to the fact that the majority of the digital cameras…
Hex/Bin/Dec Converter And Calculator — Updated
Based on some user feedback, I have updated the Hex/Bin/Dec converter and calculator I created a couple of years ago. Added features include shortcut to clear all fields and additional calculations besides bits manipulations.
DDS Function Generator Build
I picked up an AD9850 DDS module on eBay an couple of weeks ago and decided to build a MCU controlled DDS function generator with it to replace my crude frequency generator I built earlier.
MCP2210 Library Reference
I have created a dedicated page for the MCP2210 library documentations. An link to the reference can also be found on the side navigation pane. The Doxygen generated project documentation can be viewed directly here.
MCP2210 Library — MCP3204 SPI ADC
During the past few weeks, I have shown many examples (see 1, 2, 3, 4) of using the open source MCP2210 Library with SPI devices under Linux. In this post, I will conclude this series with one more example: interfacing…
MCP2210 Library — SPI EEPROM
So far, I have shown examples of using the open source MCP2210 library with MCP2210 GPIO, MCP23S08 and TC77 temperature sensor. In this post, I will show an example of interfacing the chip with an SPI EEPROM using the library.
MCP2210 Library — SPI Example Using TC77
A couple of weeks ago, I showed an example of using the open source MCP2210 Library I created earlier to communicate with the MCP23S08 port expander under Linux. In this post, I will provide another example of using the library…
I2C Multiplexer Shield Testing
I built an I2C multiplexer shield using an Arduino prototyping shield from SchmartBoard a couple of weeks ago. The shield uses a PCA9548A I2C multiplexer and switch chip from Texas Instruments.
MCP2210 Library — SPI Example Using MCP23S08
I made a few minor tweaks to the open source MCP2210 library during the past few days, and had also updated the documentation. In my previous post, I illustrated how to manipulate the GPIO pins using this library and today…
MCP2210 Library
After a couple of weeks’ coding and testing, I finally finished the initial version of the MCP2210 C++ library for Linux. This library utilizes functions from Signal 11‘s HID API (hidraw) to communicate over the USB HID interface.
Prototyping With Schmartboard Arduino Shield Board
Neal at Schmartboard sent me a 0.65mm pitch Arduino prototyping shield kit a few weeks ago. I had meant to do a review right away, but then thought it would probably be even better if I built a real project…
Finicky MCP2210 Oscillator
Over the past couple of weeks, I had been busy playing with Microchip‘s MCP2210 USB to SPI converter. I was planning to create a Linux based API since Microchip only provided the Windows version. What I quickly found out though…
COMException (0x80072020)
This post is programming related and has nothing to do with electronics. I have not written anything programming related topics lately, but this one is worth sharing as it is related to an rather obscure error.
Reverse Engineering the Syma S107G IR Protocol
I got a Syma S107G IR controlled helicopter for my son a while ago. This tiny remote control helicopter is a rather amazing toy. Not only its movement is very stable, but the rotor speed, forward backward movements and turning…