Projects from Make: Magazine
Making a BreadBoard Power Supply
A BreadBoard Power Supply which snaps right into your BreadBoard and powers its rails with either 5V or 3.3V.Takes its input from a Wall Adapter or any other source which is capable of supplying 6V to 12V into the Kit's DC Jack.
- By Udawatabhimanyu4
- Time Required: 1 hour
- Difficulty: Easy
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[vimeo http://www.vimeo.com/32672519 w=560&h=315]
Parts
- DC Barrel Connector (2.1mm center positive) (1)
- Resettable Fuse - 500mA PTC (1)
- Breakaway male headers (7) (2+2+3)
- resistors (2) 330 ohm 1/4Watt
- Resistor (1) 240 ohm 1/4Watt
- Switch, SPDT slide (1)
- LED, Red (1)
- Diodes, 1N4001 (1)
- LM317 variable voltage regulator (Jameco Part no. 23579 NOTE: LM317’s in a TO-220 case are 1.5 amp max!!) (1)
- 10uF 16V Capacitor (1)
- 100uF 25V Capacitor (1)
- 0.1uF ceramic capacitor (1)
- BreadBoard Power Supply Kit (1)
Tools
- Soldering iron
- Third-hand tool aka helping hands RS#: 64-079
Steps
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- Get a BreadBoard Power Supply Kit if you can.
- Otherwise, gather all the required parts most of which you have already.
- Heat up your Soldering iron.
- We start off with the Male Breakaway Header.
- Take some surgical tape and put it through the male header.
- Now, stick it to the PCB at the correct position.
- Start Soldering the two pins on the Top Layer.
- Don't forget. This is a double-sided PCB.
- The complete bottom layer is the Ground Plane
- Next, comes the Voltage Regulator.
- Bend the Resistor's (330 ohm) leads as shown.
- Solder from the bottom layer.
Conclusion
If you do not have a BreadBoard Power Supply Kit, you may gather the necessary parts to make your very own BBPS.