Description The LT3690 is an adjustable frequency monolithic buck switching regulator that accepts input voltages up to 36V. A high efficiency 90mΩ switch is included on the device along with the boost diode and the necessary oscillator, control, and logic circuitry. The internal synchronous power switch of 30mΩ increases efficiency and eliminates the need for […]
Synchronous Step-Down Switching Regulator Read More »
ITEAD studio is based in Shenzhen, China, which is located with China’s biggest electronics market as well as one of the most integrated electronic supply chains in the world. A vast number of exciting and innovative products are designed, sourced and manufactured around us every day. In electronics the big picture is usually more compelling
Iteaduino Plus – ARM Cortex-A8 Dev-Platform Read More »
International Rectifier introduced the IR3823 SupIRBuck integrated voltage regulator designed for space-constrained, energy efficient netcom, server and storage applications.The IC delivers up to 3A a 3.5×3.5mm package. Efficiencies in excess of 97.5% are obtainable for designs converting power from a 6V input to a 4.8V output. The extremely high initial efficiency allows switching at up
IR’s integrated voltage regulator with 97.5% efficiency Read More »
We often receive comments that while our microchip photos are beautiful and interesting, it is completely unclear how integrated circuit implements basic elements and form larger circuit. Of course it is impossible to do a detailed review of an 1’000’000 transistor chip, so we’ve found simpler example: ULN2003 – array of Darlington transistors. Despite it’s
What’s inside the ULN2003 Darlington driver chip Read More »
What’s with mint boxes and electronics? Beats me, but they are somehow made for each other. I had built ladyada’s USBtinyISP v1.0 circuit on a breadboard which I used every other day. It worked sporadically(and never at hour of need), used up half of my breadboard and looked ugly. So I decided to try my hand
Tic-Tac USBtinyISP Programmer Read More »
This is a flyback SMPS that will boost voltage a voltage of around 20V to 40V, or more if you change the feedback resistors. It uses an off the shelf transformer from CoilCraft. The LM3479 is a nice controller because it’s frequency of operation can be set by changing R1. At 39K it runs at
Flyback Switch Mode Power Supply Circuit Read More »
I found simple and cheap ”Latching Momentary Switch” circuitWhen the circuit is powered up, all of the transistors are off and stay off. C1 gets pulled up to Vp. When the switch is pushed, Q3 and Q2 turn on, since their base is pulled up. Q1 and Q4 are in turned on as well. Q1
Latching Momentary Switch for breadboard Read More »
Catching up the development of printed circuit boards at home i often faced with the problem of “the bulbous” vias. Usually homemade double-layer boards soldering from both sides with the thin wire, the result usually satisfied but if you need to make VIA under the chip TQFP48, SOIC16 and that’s is a real problem, if
DIY PCB with flat VIA’s Read More »
Bootloading an Arduino with a ZIF socket allows you to easily program a lot of chips at once without worrying about mangling the pins. The reason for this is that ZIF stands for “zero insertion force,” and as the name implies, ZIF sockets don’t require any force to take the chip in or out. This
Bootload an Arduino with a ZIF Socket Read More »
After a year or so of reading and drooling over other people’s wonderful projects in these pages I decided to finally make one of my own. Here is my first instructable, a version of the ever popular Battery Desulfator, which I built in an Altoids tin. First, some background: My urge to build this project
Desulfator for 12V Car Batteries, in an Altoids Tin Read More »
