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The LED can uggs ladies boots sale be any standard type and will only turn on when pulses are present in the output. S1 should have at least a 3A rating, and if you use a DPDT type use both sets of contacts in parallel to reduce the contact resistance as much as possible. S2, at the output uggs sale offer cheap boots
of the 555, isolates the 555 from the output stage allowing you to make adjustments to the front end without risking overheating Q1, D2, C4 or the inductors.
The inductors I chose are listed on the schematic at the bottom of the "Possible Inductors from Digikey" list. They fit the can nicely but will need to have one lead extended slightly to reach the bottom of the circuit board. In retrospect, an inductor with a slightly higher current rating for L2 might be better as the one ugg bailey button triplet uggs sale I chose gets noticably hotter than L1 even though it has the same current rating of 2.4A. Digikey part number M8875 ND should fit the can, barely, and has a 3.6A rating, but the 2.4A coil that I'm using now really only gets hot if I get too aggressive with the pulse width fake uggs for sale ireland
D2 is a FRED (Fast Reacting Epitaxial Diode) and should not be substituted with any old diode in your junk box as the latter will probably not work well in this circuit. If it gets too hot you can use two in parallel to double the current capacity, but again, if you keep the pulse width on the conservative side it will only get slightly warm.
The FET listed works very well and is inexpensive. I mounted mine directly on the perf board with a piece uggs sale authentic of stick on copper foil (available from Digikey) under it to act as a heatsink. In this configuration it doesn't get warm at all so the copper foil may not actually be needed. Be aware that the metal tab on the FET is also attached to pin 2 uggs kensington boots on sale uk
(drain) so if you attach the FET to a heatsink you'll have to electrically isolate it from the rest of the circuit. I also used a TO 220 transistor socket to allow easy replacements but you can wire the FET in directly if you prefer. Just avoid touching pin 1 (gate) while handling it as it is very ESD (static) sensitive.
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