Printed Circuit Board Assembly Methods

Design-for-manufacturing (DFM) is a well known term and an essential part of the design process. Not as well known but just as important is the concept of design-for-assembly (DFA). If you optimize your circuit board so that it is produced flawlessly, yet make it so the board can only be assembled by tedious hand soldering, then you have saved cents per board on manufacturing just to increase the cost by dollars per board on assembly. To avoid this, both the manufacturing and the assembly need to be taken into account during the design phase. 

Fortunately, there is generally no need to compromise between manufacturing or assembly and in most cases you should be able to design a board that is both highly manufacturable and easily assembled. The first step in being able to design-for-assembly is to understand the assembly process. This process will be discussed in depth to show how a board goes from an unpopulated printed circuit board (PCB) to a final product, ready to be packaged and sent to consumers. You can check the Printed Circuit Board Assembly Methods for more info about this.

Guide of Driving LEDs

The first commercial Light Emitting Diode (LED) was introduced in the 1960’s. From its early beginnings as a low intensity red light, the LED has emerged as a highly versatile component, critical to a wide variety of applications.

Powering LEDs
LEDs are current controlled semiconductor devices. The intensity of the light output is proportional to the current flowing through the junction. Care must be taken to observe the correct polarity of the LED and not to exceed the maximum current rating. In either case, catastrophic damage to the LED may occur. The voltage flowing in the circuit has to be enough to provide the forward drop required by the LED (or LED’s) connected.

Railway DC/DC Converters for Ultra-Wide Input

Just released in the market the most awaited series of the highly efficient DC/DC converters. The new model series was designed due to high demands of variety of applications.

MR1511S series is a family of single output 15 W converters packaged in a compact 1 × 2 inch case is now available from MicroPower Direct.

Five standard models operate from wide 40 VDC to 160 VDC (110 VDC nominal) 4:1 inputs, providing tightly regulated single outputs of 3.3, 5, 12, 15 or 24 VDC. Standard features include line/load regulation less than 1.0%, input/output isolation of 1,500 VDC, a remote control input and efficiency as high as 89%. All models are protected for output short circuit faults and output current faults. The MTBF (per MIL HDBK 217F) is greater than 1.0 Mhours.

Read more about DC/DC converters for ulra-wide input. You can also search about cosel power supply which a very useful info as well.