Kerry D. Wong – Page 22

A Unipolar Stepper Motor Driver

The drive circuits for Unipolar stepper motors are usually very simple. In its simplest form, a transistor or MOSFET is […]

I recently bought a new digital multimeter (BK 2709B) and after a couple of months’ use, I am quite satisfied […]

DS28EC20 is a 20Kb 1-Wire EEPROM chip from Maxim. Like all other 1-wire devices, only a single pin is needed […]

Since I do not have a DSLR camera, taking photos for my projects under normal room lighting can be quite […]

Just because you are using a true RMS multimeter does not automatically mean you should always trust the readings of […]

Most of the multimeters do not offer resistance measurement in the milliohm range. In most meters a typically Ohm range […]

One of my computers has been unstable for quite some time now. It had been crashing and freezing up once […]

One of my RSA SecureID tokens had recently expired, so I decided to do a teardown to see what is […]

Apress was kind enough to send me a copy of their recently released book “Arduino Robotics” a few weeks ago […]

I recently dug up two sets of RF link transmitter/receiver modules from Sparkfun. I got these RF transmitters and receivers […]

As I mentioned a couple of weeks ago, I had been having some issues with my wireless connection at home. […]

The other day, I needed to measure the AC current of my water heater without having to disconnect the wiring. […]

It seems that the 2701HG-B gateway AT&T uses for its DSL customers has some issues with its wireless mode. I […]

I wanted to be able to check my web server’s statistics periodically but did not want having to log on […]

Most of the recent Arduino and compatible boards use some kind of USB to UART hardware (e.g. FT232RL in Arduino […]