SAFE Assembly Guide

Safety Precautions, Warranty, and Disclaimer Improper soldering and handling of electricity can cause serious injury and damage to your property. Read and understand the instructions below before beginning your project. Follow the instructions, build carefully, and use the appropriate tools. Build at your own risk. DIY Recording Equipment, LLC is not responsible for any damage or injury resulting from the assembly or use of your kit. You are the manufacturer of your kit. It is your responsibility to turn this group of parts into a working piece of recording equipment. DIY Recording Equipment, LLC does not guarantee the success of your project and disclaims any Implied Warranty of Merchantability. Please visit the support forum for assembly support.
Damaged or Missing Parts All kits and parts are checked before being shipped to you. If something arrives damaged or if your kit is missing a part, please open a support ticket to inquire about a replacement. Missing parts will be replaced at our expense. Damaged parts should be returned for verification. If the part shows signs of use beyond what was necessary to determine that it was damaged, DIY Recording Equipment, LLC reserves the right not to replace the part.

Thank you for purchasing an SAFE kit! SAFE is designed to be very quick and easy to assemble. You can expect your built to take between 15-30 minutes.

If this is your first DIY project ever, we recommend reading our Getting Started Guide.

If you have any questions please don't hesitate to contact us for support.


Assembling the SAFE
1. Required Tools

All you need to build the SAFE are a soldering iron with a small tip, solder, and wire clippers.

2. Optional Tools

We highly recommend a wire stripper for removing the insulation from the hookup wires and a desoldering pump in case you make a soldering error.

3. Unpack the Kit

Your kit should contain:

  • Potentiometer
  • Jack
  • 2x Diodes (orange and yellow things)
  • Resistor (blue thing)
  • Capacitor (yellow thing)
  • Red Probe
  • Black Probe
  • Red Wire
  • Black Wire
4. Bend Diodes and Resistors

Bend the leads of the diodes about 1/8" away from the body so they'll be easy to insert into the PCB. Bend the resistor's leads right at the body.

5. Place the Small Parts

Insert the diodes into the spaces marked "D1-D4." Diodes will only conduct in one direction, so make sure that the yellow lines on the diodes line up with the corresponding lines on the PCB.

Insert the resistor into the space marked "R1." The resistor doesn't care which direction it's placed in.

Insert the capacitor into the space marked "C1." It cares even less than the resistor.

6. Bend Leads Against the PCB

Before flipping the PCB over to solder, bend the leads against the bottom of the PCB to hold the components in place.

7. Solder the Diodes and Resistor

Heat each pad and lead for 2-3 seconds, apply a small bit of solder, and continue to heat the pad for another 2-3 seconds. Allow each solder joint 10 seconds to cool before moving on to the next one. The finished joints should be shiny and should have just enough solder to cover the pad entirely.

8. Trim the Excess Leads

Use your wire cutters to trim the leads down as close as possible to the solder joints.

9. Place the Potentiometer (Pot) and Jack

Place the pot and jack in the spaces "VR1" and "J2."

10. Bend the Jack's Leads

Bend a couple of the leads of the jack against the PCB so it'll stay in place. You may need to use the blunt end of the wire cutters to push the leads against the PCB.

11. Solder the Pot and Jack

Solder the pot and jack to the PCB, including the pot's mounting tabs.

12. Strip the Hookup Wires

Cut the insulation around the hookup wires about 1/4" from each end. Leave the excess pieces of insulation on the wire for now. If you're careful you can do this with wire cutters, but it's much easier with a dedicated wire stripper.

13. Twist the Insulation Off the Wires

Twist the extra pieces of insulation as you slowly pull them off the wires. This will twist the individual strands into a nice spiral and prevent fraying during soldering.

14. Place the Wires

Insert the wires into the holes marked "J1" from the top. Put the red wire in the hole next to the "+" sign.

15. Solder the Wires

Solder the wires to the PCB and trim them down to the solder joint.

16. Take Apart the Probes

Carefully take apart the two pieces of the probes.

17. Put the Plastic Pieces on the Wires

Put the wires through the plastic-only pieces of the probes as shown.

18. Insert the Wires Into the Probes

Place the ends of the wires through the holes in the metal part of each probe. Bend the bare parts of the wire against the metal of the probe to create a solid mechanical connection before soldering.

19. Solder and Trim Wires

Solder the wires to the metal parts of the probes and trim any extra wire.

20. Put the Probes Together

Put the parts of the probes back together. Press the plastic metal part into the plastic part just enough so that it stays together. You should be able to easily engage the spring to push the hook out from the top of the probe.

21. Complete!

Congrats on completing your SAFE kit. You can now use it to test your other DIY gear without fear of damaging your audio interface.