Electronics – Page 14 – Kerry D. Wong

UPS Transfer Time Measurement

Most offline/line interactive UPS‘ (Uninterrupted Power Supply) have a transfer time between 5 to 15 milliseconds. In this post, I […]

I love old Tektronix analog oscilloscopes and I could not seem get enough of them. So when I saw a […]

I typically use linear regulators (e.g. 7805, LM317, etc.) in my projects. Linear regulators (especially the low dropout ones) are […]

A few weeks ago, I discussed how to calibrate middle to low end DMMs using a precision voltage reference such […]

In my previous post, I showed a simple vacuum fluorescent display filament driver built using a 555 timer and a […]

I recently salvaged a vacuum fluorescent display (VFD) from a piece of old test gear. The VFD is a 13 […]

Having a decent digital multimeters is an absolute necessity if you are doing any types of electronics work (see Dave’s […]

Avalanche transistors can be used to generate fast rise time pulses. Their usage in the hobby world was made popular […]

I wrote a tutorial a while ago on how to hand solder fine pitched LGA/QFN chips using perfboards. While The […]

My seven year old 24 inch LCD monitor (Westinghouse L2410NM) started to flicker recently, so I decided to take a […]

I bought an old Tektronix 2445 150 Mhz oscilloscope on eBay the other day. It was listed under “For Parts/Not […]

The current sourcing/sinking capability of the I/O pins on Raspberry Pi is quite limited. According to the Wiki page, the […]

Neal from SchmartBoard sent me an MSP430F5172 development board to check out. This board, according to the website, was co-designed […]

Last week, I discussed the construction of a network-capable temperature and humidity sensor using SHT21 and ENC28J60 with an ATmega328P […]

I did a project on temperature/humidity logging a couple of years ago. In that project I logged the temperature and […]