Looking at an object
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|STEPS||NOTES AND DETAILED INSTRUCTIONS|
|Determine what kind of Device it is||
|Determine the level of demand for the item in the Thrift Store||
|Check for Damage||
If there's dirt or grime wipe it down with a rag and some cleaning solution.
|Check for a Power Source||
When checking for what type of power is required there will usually be a listing of what Voltage & Amperage are needed. The location of this information depends on the item, but will typically be located on the back or bottom face of the item, or near the power adapter plug location.
If the Voltage and Amperage requirements are not available on the device you will have to use Google, Ebay, and the other electronic resources available to determine the specifications of the device. If you absolutely cannot find anything about the device, take it to an instructor and they will attempt to assist you in determining what the requirements are.
Once you have determined the power requirements of the device, look through the "Wall Wart" (power adapter) bins to find a power adapter which matches the voltage (V) of the device EXACTLY *and* has a Amperage rating equal to or greater-than the requirements of the device. So, a device which is 12V and 2A can use a power supply that is 12V and 3A, but NOT one that is 12V and 1A. Never mix the Voltage of a device and power adapter, it can cause overheating and damage the device. This is because the power adapter does not determine the amperage draw, the device being used determines the draw. It is best to match the amperage as closely as possible so that we are not wasting higher-capacity power adapters on low-powered equipment. Voltage MUST MATCH EXACTLY in order to prevent damage!
Looking at the barrel of the power supply, make sure you are using the correct size. Does the barrel of the power adapter you are using have reverse polarity? Normal polarity is for the outside of the barrel to be ground (indicated as [-]), and the inside of the barrel is the positive terminal (indicated as [+]). If you are unsure or do not understand the directions, have an instructor check to make sure you have the correct power supply for the device you are using.
|Test the Device||
Look up the correct procedure for testing the device you are holding. Many of the instructions are located at Hardware Testing If you cannot find the correct procedure in the Wiki please ask an instructor for help.