Resistor box (resistance board) SMT patch

Dreaming back to junior high school

As the title says, it is an adjustable resistance plate, adjustable from 0.1 to 9,999,999.9Ω

Low-tech work

So why draw this SB board?

It all started when Lichuang gave me an SMT coupon one week in September 2020...

Obviously, the purpose of this project is to get rid of this SMT coupon...

Because JLC's SMT costs 50 yuan to start up, and the components are relatively expensive (for example, if you use 3 resistors, you will be charged 20 yuan...)

This board is full of resistors, so it’s more comfortable (bushi)

When all 5 pieces are fully pasted, the PCB is not included in the cost. SMT costs 11 yuan, and the 0.1 ohm resistor is an expansion library. If you need to pay more, it will not be pasted.

SMT patch renderings

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2020-10-2 Update: Finished product testing and display

Overall appearance

Test chart

Test conditions: Amber AT826, basic accuracy 0.2%, frequency and other specific conditions, please see the picture

Materials:

• The pin header is C358699
• The 0.1Ω resistor is hand-mounted, with an accuracy of 5%.
• Other resistors are from JLC SMT, accuracy 1%

The resistance of pin headers, etc., is about 0.1Ω

Set 0.5Ω

Set 5Ω

Set 50Ω

Set 500Ω

Set 5KΩ

Set 50KΩ

Set 500KΩ

Set 5MΩ

Set 1.2345MΩ

Set 987.6Ω