3 PCs SMT-300 PCB prototyping board Accepts Practically all SMT packages

Item Name : SMT-300 The sale is for 3 SMT-300 boards. the additional images above are to see what the board looks like and how it can be used. These boards are unique items targeted specifically at allowing the user to quickly build prototype circuits using smt and through hole parts before or instead of going to PCB layout. They provide a convenient platform for supporting many many different types of circuit in a free form way. Description: The SMT-300 Provides a transition board from through hole technology to the current surface mount world. Surrounding the universal grid is a 0.100 inch pitch through hole grid. The grid serves several purposes, it provides: A convenient way to break the board apart into two boards by breaking along a through hole line Through hole component mounting holes for mixed designs. Connector mounting for those that do not like surface mount connectors (which are easily mounted on the SMT grid by the way). Handy pass through connections (call them vias) for connecting one side of the board to the other if desired. Connection points to SMT adaptor boards if you really cannot mount one of the SMT components on the board and need to use and adaptor. Of course the SMT-300 offers two smaller prototype areas as well with all of the benefits of the BoardworX system as well. Specifications: Dimensions: 3? X 2? Grid Top: 0.5 mm Grid Bottom: 0.63 mm (0.025 inch) Grid Throughole : 0.100 ? rows Material: FR-4 Finish: HASL (Hot air solder leveled) SMT Pad Shape: Rectangular TH Pad Shape : Round Use of theTechnology SMT technology is different than through hole so it follows that a prototyping system needs to be different. BoardworX takes a different approach in providing the user a free form platform on which to place parts by utilizing the?Universal Grid? concept. It is designed to accommodate the many standard packages and allow parts to be arranged in the best placement to make and wiring as easy as possible. The flexibility is only limited by the designer?s imagination. The fundamental idea is to give the circuit designer a board on which to place parts as desired and wire the board as fits the need. Three basic ideas allow this: 1. Best Fit Placement Since there exists a wide and varied range of pin spacing and geometries in the surface mount world, it is not feasible to have standard spacing grids for all parts. BoardworX draws on the ingenuity of the user by utilizing a best fit approach for mounting parts. Generally, most parts will fit the grid easily because the part pads will bridge two or more grid pads so mounting these is simple, just drop the part down and tack it in place. For smaller and finer pitch parts, the grid is designed to allow the user to shift the part around to get the best fit so that all pins have a pad and there are no inter-pin shorts. This works fine for most pitches down to 0.5 mm. The grid spacing has been specifically chosen to accommodate as many pin pitches as possible. In addition some boards are available with a different pitch on each side of the board so the user can choose their preference. Click here to see an animation of part placement. The pads can also be ripped up in strategic locations to eliminate pin shorting in cases where special packages require it. The pads can be cut in half with a sharp knife to ease use as well. 2. Flexible part location Rather than be tied to a fixed part location as exists with through hole perforated boards, BoardworX allows any parts to be placed in any location to make circuit creation faster and easier. Laying down an 0603 resistor across 2 pins on an IC and connecting to another part with the other end is one example, This way circuit component layout can be made simpler and closer to the schematic physically which allows for easier wiring and faster prototyping. 3. Shape and structure Pads are arranged and designed to accommodate easy mounting of parts with sufficient exposed pad area to make for easy soldering. Pan spacing has been precisely chosen to accommodate standard pin spacing?s and allow easy placement with minimal bridging of pins