The most expensive element is copper for a 5V FET. I actually paid $1200 for copper so I can get a good FET in, but the most expensive part is the capacitor (up to $6200 for a good FET and capacitor).
FETs aren’t cheap either, but they are more reliable in general so they have a higher price tag. An FET usually costs about $8 to $11 and capacitor is about $150 or $200. The rest of the components are relatively cheap.
What’s the most common resistor type?
All resistors will generally be of the same size. So most resistors on an AVR are 5 ohms. Some are 8 ohms. That depends on the component that you are looking at and the manufacturing process of the component. You can tell a lot by looking at the size of the resistors themselves. Smaller size resistors are better because they provide better signal performance and don’t require huge amounts of current or power. But it pays to know what types of resistors you have in your components as well too. You can use this spreadsheet to measure the resistors in your circuit and compare them.
Which resistor types are there?
Here is a list of popular resistor types in the hobby market.
Resistor type Rating Voltage (Ω) Wire Size Material R.F (pF) Resistor 8N2230 R2K2 1.8 0.8 2.4K2/0.1 2.4Ω Copper Semiconductor 1N4007-14K5 1 1.8 0 0.1K1 1K1 Copper Semiconductor 2N4400-23K 1.8 1 0.8 0.1K2 1K2 Copper Semiconductor 1N4007-14K4 2 0.8 0 1K5/8 1K5 Copper Semiconductor 1.8 0.8 2 1K2/0.1 1K2 Copper Semiconductor 1N8007-14K3 1.8 0.8 1 2K6/0.1 2K6/0.1 Copper Semiconductor 2N4400-23K2 1.8 1 0.8 0 0K6/4 0K6/4 Copper Semiconductor 2.6 0.8 1 2K6/4 0.1 2K6/4 Copper Semiconductor Copper 0.9
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