Resistance Decade Board

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parkview
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Resistance Decade Board

Post by parkview » Wed Aug 08, 2018 10:24 pm

I needed a quick method of checking the best resistance needed for various circuits. I could use a variable resistor, but some circuits needed less than 1 ohm, so I whipped up a couple of low and high resistance decade boards at home using this method: http://forum.swmakers.org/viewtopic.php?f=12&t=186. A year has gone by and I have used them a few times and thought I could add a couple of variable resistors and a few extra rows of resistors and send the board off to China to be produced professionally.

The home brew version:
RDB_orthangonal.jpg
RDB_orthangonal.jpg (33.62 KiB) Viewed 3882 times


Panellised PCB as sent off to China for production:
Resistance_Decade_Board_v2.0_Top.jpg
Resistance_Decade_Board_v2.0_Top.jpg (155.71 KiB) Viewed 3882 times

parkview
Guru Maker
Posts: 603
Joined: Tue Jun 24, 2014 8:25 pm
Location: Busselton
Contact:

Re: Resistance Decade Board

Post by parkview » Thu Aug 09, 2018 6:48 am

I forgot to mention a bit about who I used to manufacture the PCB panel of boards. You can read a review of a few manufactures here: http://forum.swmakers.org/viewtopic.php?f=10&t=208

This panel is being made by Seeed http://forum.swmakers.org/viewtopic.php?f=10&t=208 and cost US$4.90 + US$13.26 for shipping, or A$25.63 for 10 lots of four boards, or around A$0.64 each delivered to my door in 18 to 30 days time.

parkview
Guru Maker
Posts: 603
Joined: Tue Jun 24, 2014 8:25 pm
Location: Busselton
Contact:

Re: Resistance Decade Board

Post by parkview » Sat Sep 15, 2018 9:59 pm

The PCB arrived back from being manufactured at Seeed in Shenzhen China. Seeed's manufacturing times are all over the place. This one took 6 days to be made and 23 days to be cheaply shipped to Australia, so it arrived 29 days after the order was placed.

Resistance Decade Board V2.0.sml.jpg
Resistance Decade Board V2.0.sml.jpg (41.16 KiB) Viewed 3857 times


The only mistake was the connection plug footing was not quite the best size. It works, but could be improved if I do another PCB order.

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