Make A Breadboard Power Supply

Step 5 Cost

Now you might be wondering, What if I didnt have all these parts? Well sir (or madam) you need to get a blow torch and start salvaging! But before you do that, go to your favorite supplier and order the parts from the parts List. My favorite distributor is Mouser or Digikey, but I usually order in Odd or even amounts, usually rounding UP. For example, if I need 3 of one part, I'll order 5 in case some break or if I need more.

But for the sake of example, I'll order 1 of each. I am also leaving the capacitors, headers and LED out, since you should have the LED and caps are optional. The caps and Headers are salvageable from old electronics

LM7805
http://mouser.com/Search/ProductDetail.aspx?qs=VOMQJJE%252bBNlQknJDd4ZVLg%3d%3d
Price: $0.26 Each
There is no doubt in my mind you'll use more of these, so order 3 or more.

1k Resistor
http://mouser.com/Search/ProductDetail.aspx?qs=fc8fDdkqkU9Oquprk5glgw%3d%3d
Price $0.02 each
Freaken Cheap. 1% Resistor. 2 cents each, order 50 Of these as you'll use them also.

Acceptable replacements for the 182 Ohm resistor are 180 to 220. These will cost the same as the 1k,

1k Pot
http://mouser.com/Search/ProductDetail.aspx?qs=ifmdR88tEJ%2fqAwsbWNJBJQ%3d%3d
Price: $0.82
A bit expensive but I couldnt find the same type of pot I used.

2.5mm Plug
http://www.mouser.com/Search/ProductDetail.aspx?qs=8xMK%252bwDsXhdbvGfNGg4kjA%3d%3d
Price: $0.64

Total Price $1.82!!

Even if we included the Headers + capacitor, The total wouldnt be more than $2. For a linear Breadboard PSU, I call think this is pretty dam cheap considering Ive seen others being sold for $30

Comments

[bearsinthesea]

nice project!
for people like me w/o mad pcb making skillz, sparkfun sells a kit like this
http://www.sparkfun.com/commerce/product_info.php?products_id=114

http://www.curiousinventor.com/kits/bread_power