SIR-KIT ELECTRONICS

 

HOME SIR-KIT  SYSTEM LINKS SERIES 1  KITS SERIES 2  KITS ADVICE COMPONENTS
RADIO LED TORCH TOOLS ORDER  FORM PROJECT  IDEAS TEACHER  PAGE NIGHT LIGHT

 

General advice for building our kits or any circuit on stripboard

Components should be mounted on the plain side of the stripboard, with the wire ends pushed through holes and soldered with the minimum amount of solder, taking care not to bridge the gaps between copper strips. If the copper is cleaned with very fine abrasive (i.e. wet and dry paper) before use, better joints can be produced. Always use a small electronics type soldering iron and electronics grade solder, and keep the bit (tip) clean and well tinned (coated with solder). The iron can be cleaned with a quick wipe on a damp cloth or sponge.

RESISTOR COLOUR CODE

 

BLACK

0

GREEN

5

BROWN

1

BLUE

6

RED

2

VIOLET

7

ORANGE

3

GREY

8

YELLOW

4

WHITE

9

 

 

i.e. a resistor with Yellow, Violet, Orange stripes has a value of 47000ohms (47K)

Variable resistors, or potentiometers, are adjusted by turning the slider control using a small electronics screwdriver in the slot provided.

Circuit pins should be pushed in from the copper side of the board and soldered in.

****THE FOLLOWING COMPONENTS MUST BE INSERTED THE RIGHT WAY ROUND OR DAMAGE WILL OCCUR.****

           

 

         

 

When joining our kits, wires should be kept short, ends bared for about 5mm, the strands tinned with solder, and formed into a hook with pliers to fix them to the pin before soldering them to the pin. As an alternative to soldered joins you can use short crocodile clip leads. A set of six can be found on series one kits page.

Wire links on boards are best made with solid cored wire mounted on and pushed through from the plain side of the board.

 

How to solder:- Practical Electronic Soldering Advice

Placing the components.

To place components on the board, first hold the board with the component side facing you. Start with the smallest components, normally resistors.  Bend the leads of the component so that they fit through the holes in the board.  Then bend the leads on the solder side of the board so the component doesn't fall out when you turn the board over to solder them.

   

 

Soldering.

After a few components have been mounted on the board, you can solder them.  You should frequently wipe the tip of the iron on a damp sponge or damp cotton cloth to keep it clean. 

To solder a component turn the board over so the copper track side is up.  To solder a connection hold the tip of the soldering iron on one side of the lead for a second or two, making sure it also touches the copper track.  When the lead and the track are hot, apply solder to the side of the lead that is away from the iron.  The solder shouldn't touch the iron directly.  This ensures that the connection is hot enough to form a bond with the lead and with the copper track.

The solder should flow around the connection, and leave a smooth transition from the track to the lead, as shown.  If you have a ball, or the solder has a clumpy appearance you may have what’s called a “dry joint”.  This will not be a good electrical connection, and you will need to redo the joint.

Finally trim off spare wire from the component leads using side cutters.

 

STRIPBOARD PLANNER

Here is a stripboard planner with the same number of holes as the small stripboard (SB2) we sell on our components page.

You can copy and print it so you can plan your own circuits. The copper tracks on our stripboard run left to right, but are not printed as this would confuse the diagram.

[home] [sir-kit system] [links] [series one kits]  [series two kits] [components] [tools] [torch] [order form] [advice] [project ideas] [teacher page] [radio] [night light]