Differences

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--- parts_faq [2016/06/15 12:43] – [What type of crystal do I need?] psykhaze
+++ parts_faq [2016/06/15 12:47] (current) – [What is the correct polarity of the (resistor / capacitor / diode / etc)] psykhaze
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 ====== Parts FAQ (Frequently Asked Questions) ======
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 ===== What wattage resistors should I buy? =====
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 **Resistors can be installed in any direction**.
-Smaller value capacitors (i.e. usually under 1 uF) generally have no polarity.  Anything above 1 uF is typically an electrolytic capacitor, and it will have a polarity marking.  Most often the "-" side is marked with a big stripe, although sometimes it's the "+" side that is marked.  (Strangely, the "+" side seems to be marked on capacitors made in U.S.A.)
+**Smaller value capacitors (i.e. usually under 1 uF) generally have no polarity**.  **Anything above 1 uF is typically an electrolytic capacitor, and it will have a polarity marking**.  Most often the "-" side is marked with a big stripe, although sometimes it's the "+" side that is marked.  (Strangely, the "+" side seems to be marked on capacitors made in U.S.A.)
 **//Diodes absolutely must be installed in the right direction//**.  Diodes have a stripe on the cathode side.
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 ===== I can't find a bridge rectifier to fit the PCB's. =====
 You can substitute four 1N4001 (or any of the 1N400X series) for the bridge rectifier, they will handle more than enough current.
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 ===== What Power supply should I use, and how much power should it have? =====
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 Yes, 1N4004 is a replacement for 1N4002, it's just a type for higher Voltages (100V for 1N4002 vs. 400V for 1N4004). Any 1N400X diode will work in place of any other 1N400X diode -WITH A SMALLER NUMBER- Do replace a 1N4002 with a 1N4004 Don't replace a 1N4004 with a 1N4002
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 ===== PIC Stuff =====