Decade  CAPACITANCE  PCB

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Decade Capacitance PCB 2pF-100uF

Part number 120067

This decade capacitance PCB is not exactly a decade adjustable piece of test gear.  In order to make it truly adjustable in decade format it would nearly double the cost of the product.  Instead we opted to put sets of 4 or 5 equal value capacitors in series.  Below is the dial cross reference to capacitance.

This board uses several MLCC low ESR capacitors and can be adjusted from 2pF up to 100uF.  The capacitance can be turned off by turning all knobs all the way to the left.  Capacitance can be added across the dials.  Ex: Dial1=50pF and Dial2=1000pF then the total capacitance is 1050pF.  The switches are break before make contact configuration.  The PCB measures 2.0” square.  The PCB comes with 3 different ways to hook up your wires: male 0.1” header, female 0.1” header, and a flying lead spring cage connection.  Schematics and EagleCAD files are available for download at the bottom of the page.  

DISCLAIMER: Since the tolerances of the capacitors vary widely and the larger the capacitance values in an MLCC capacitor are harder to attain, the values may be lower.  Example:  The 100 uF caps will most likely read out at 90 uF or lower.
 
Dial 1:
·0
·2pF (10pF *5 caps in series)
·2.5pF (10pF *4 caps in series)
·3.3pF (10pF *3 caps in series)
·5.0pF (10pF *2 caps in series)
·10pF (10pF cap)
·25pF (100pF *4 caps in series)
·33pF (100pF *3 caps in series)
·50pF (100pF *2 caps in series)
·100pF (100pF cap)
Dial 2:
·0
·200pF (0.001uF *5 caps in series)
·250pF (0.001uF *4 caps in series)
·333pF (0.001uF *3 caps in series)
·500pF (0.001uF *2 caps in series)
·1000pF (0.001uF  cap)
·2500pF (0. 01uF *4 caps in series)
·3333pF (0. 01uF *3 caps in series)
·5000pF (0. 01uF *2 caps in series) (mislabeled as 5000uF on PC)
·0.01uF (0. 01uF cap)
Dial 3:
·0
·0.02uF (0.1uF *5 caps in series)
·0.025uF (0.1uF *4 caps in series)
·0.033uF (0.1uF *3 caps in series)
·0.05uF (0.1uF *2 caps in series)
·0.1uF (0.1uF  cap)
·0.25uF (1.0uF *4 caps in series)
·0.33uF (1.0uF *3 caps in series)
·0.50uF (1.0uF *2 caps in series)
·1.0uF (1.0uF cap)
Dial 4:
·0
·2uF (10uF *5 caps in series)
·2.5uF (10uF *4 caps in series)
·3.3uF (10uF *3 caps in series)
·5uF (10uF *2 caps in series)
·10uF (10uF cap)
·25uF (100uF *4 caps in series)
·33uF (100uF *3 caps in series)
·50uF (100uF *2 caps in series)
·100uF (100uF caps)


This can be ordered two different ways:


1. COMPLETE: Completely built and soldered ready to use for $40.

2. PARTIAL: Surface mount resistors come soldered to the board only and you have to solder the through hole components for $30.  Through hole components are supplied.

Click here to order the Decade Capacitance PCB.


 

$30.00 - $40.00

Send me an email for any questions:

jebadiah.moulton@atlanta-robotics.com

Description

The Decade Capacitance PCB consists of the following key components:

  • Rotary Switche 1 POL 10 POS D SHAFT (PN# SR2513F-0110-19F0A-T-N, Alpha)
    • http://www.taiwanalpha.com/english/p_e_144.htm
  • Knobs SOFT TCH D SH GY/YL (PN# 450-4662, Eagle Plastic Devices)
    • http://www.mouser.com/catalog/specsheets/EPD-200220.pdf
  • Spring Cage Fixed Terminal Blocks PTS 1,5/ 2-5,0-H (PN# 1792863, Phoenix Contact)
    • http://www.phoenixcontact.com
EAGLE FILES:  Schematics and EagleCAD files are available for download HERE.   

DATASHEET: Click HERE for Decade Capacitance PCB datasheet download.

BOM: Click HERE for Decade Capacitance PCB bill of materials download.

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