I used a scrap of a 96” piece sold at Homeĭepot # 030699-568703 selling for under $11.00.ġ-ea 2-AA Battery Holder (enclosed 3.1v) Radio Shack # 270-408. If you have a 'junk box' cost may be zero.ġ piece of 1/16” aluminum C-Channel 3/4” x 1.5”. ![]() ![]() Note: you can determine the value of the resistor needed by going to: andĮntering the supply voltage (3.1), forward voltage of the LED (2.5), and desired LED currentī) Touch Block parts Estimated cost: less than $10.00. Estimated cost: $10.00 or less before tax and shipping, if any.ġ-ea 2-AA Battery Holder (enclosed 3.1v) Radio Shack # 270-408ġ-ea 5mm Red LED Radio Shack #2760041 or equivalentġ-ea Current Limiting resistor to match your LED (24ma or less) typically 27 – 56 ohm. Skip this if you already have a continuity tester that is suitable for use with the touch block. The project is actually two easy projects in one: 1) the touch block, 2) the continuity tester which powers the touch block and provides a LED indicator to show when the tool makes contact with the plate.Ī) Continuity Tester parts.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |