Posted in Arduino, Learning Electronics on Dec 22nd, 2013
DS1307 is an old and classic real-time clock (RTC) chip that has been used in many electronic circuits. There are also many libraries written for DS1307, notably this Arduino Time library which includes a DS1307RTC class. Given its age and popularity, it’s surprising that the chip is not cheap: even at volume pricing, it usually […]
This is a long delayed post. I am glad I finally finished making a video for it, and it’s time to introduce SquareWear 2.0 — an open-source, wearable Arduino microcontroller board. At heart, SqureWear 2.0 is an Arduino running at 3.3V and 12MHz. It has built-in mini-USB port for uploading programs, charging lithium batteries, and […]
Posted in Arduino, Power switch, Tools and equipment on Nov 18th, 2013
A reflow oven comes in handy when you work regularly with SMT circuits. I’ve had the T-962A reflow oven for about a year now. While it has worked reasonably well, recently it has started showing some signs of aging. First of all, the total reflow time is quite long, about 15-16 minutes. This is really […]
Posted in Arduino, Sprinkler Projects on Oct 23rd, 2013
Continuing from yesterday’s post, today’s sneak peak preview is for OpenSprinkler DIY v2.1u — the solder-and-assemble-yourself version of the OpenSprinkler. This is the first major upgrade of the DIY version since v1.42u. The main differences compared to 1.42u are: The microcontroller is upgraded to ATmega644, doubling the flash and RAM size of ATmega328. Switching regulator […]
A month with no new post? That’s unacceptable. Since my last trip to Shenzhen, I actually have quite a few new ideas and projects to post about. The thing is there are so many of them that I don’t know which one to start with! Anyways, I’ve decided to put a stop to this. In […]
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