1. Payload 2015 Class 8
By Jeff Dunker
5/22/2019
2014 Beginner Payload

2. Project 1 Building our own linear voltage regulator on a Solder
I recommend adding a switch here. I did on mine.
I used two mini or alligator clips here
I used the 9V clip here
330
We’ll use
12 or 9 V
batteries
5/22/2019
2014 Beginner Payload

3. Project 1 Parts list 330 ohm resistor
5K potentiometer (I used a linear 10K Pot worked okay too witch makes it easy to change the voltage)
0.1 uF capacitor (number on part could be 104)
10 uF capacitor
LM317 voltage regulator
Suggested parts
9 Volt clip, and power clips Power in
2 Mini clips or alligator clips Power out
SPST switch
5/22/2019
2014 Beginner Payload

4. Assembly order Remember the order we built it up on the bread board?
We will use that experience to assist us on doing the same on the pref. board.
Notice the copper pattern on the board, see how it differs and how it may be the same
Again decide on the position on the board for the LM317 but don’t solder it yet.
Dry assemble the parts to the board similar to the bread board paying attention to where the boards copper helps and where you may need a wire to finish a connection.
Once you have a layout, checked with the schematic like we did for the bread board
Now we are ready to start to solder parts. Again on our small board these guideline might seem not too important but on larger board it will.
Start by soldering in the pre-planned location the smallest (lowest profile part)
This is typically the resistors, then capacitors
I like to solder all passive components last, why because heat can damage them much easier than the passive parts
Now solder the LM317 and then the big pot, if you have closely spaced part you should have notice that had we done it in reverse order those big part would have gotten in the way of soldering the small one in.
5/22/2019
2014 Beginner Payload

5. Solder Project 1 You have the rest of the class to solder them up
Please plan to have more than one project per proto board as they are in short supply
Plus you will find that it can actauly help future projects
5/22/2019
2014 Beginner Payload

6. A bit of practice first
I have noticed that some of our alligator jumper wires have been poorly assembled
First use the DVM’s to find the bad jumpers, a good one should have near zero resistance.
If it does pull back the covering of the alligator clips both end and remove the wire from the clip, strip the wire
And solder it back together
Check to make sure we have a good jumper wire
Continue to all jumpers are good for our future use.
5/22/2019
2014 Beginner Payload