Miscellaneous – Page 4 – Kerry D. Wong

Simple Current Transformer

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 […]

After I built my first Pinguino, I decided to do some experiments on using crystals of different frequencies. By default, […]

As I mentioned a few weeks ago, I was in the process of building tools necessary to bootstrap the hardware […]

I have built some circuits that interface with computer USB ports. On several occasions, I had built the circuits but […]

I built a 4-digit 7 segment display last year. In that design, I used four 74HC595 shift registers to drive […]

Various reports suggest that AT&T DSL usage will soon be capped at 150GB per month starting May 2. And to […]

Having recently read an article on the current overall browser statistics, I decided to comb through my server log to […]

My site traffic has been increasing quite a bit recently and my old Pentium III server is certainly showing its […]

TCA9555 is a 16-bit I2C I/O expander from Texas Instruments. It allows the easy addition of 16 I/O ports on […]

I started this project a while ago. My intention was to adapt a toy remote controlled vehicle into a generic […]

I was looking for some parts a couple of weeks ago and came across an old TV flyback transfomer, so […]

After I wrote this guide on how to build an ultrasonic range sensor from scratch, I have received many comments […]

I am in the process of converting a remote controlled toy vehicle to an autonomous robotic platform. My initial thought […]

Modified sine wave is essentially just a pulse width modified square wave. It is a very useful waveform for power […]