empowering creative people

SparkX Pi-Filter

SKU: SPX-15260

$4.79 AUD, inc GST
$4.35 AUD, exc GST

More Views

SparkX Pi-Filter
4.79 AUD

SKU: SPX-15260

$4.79 AUD, inc GST
$4.35 AUD, exc GST
In stock, with a short lead time. 109 units dispatch in 3 to 6 days (in addition to the shipping method you choose). Our timing and stock is accurate. Delivery to you by Fri, 29th of Mar with Express Post within Australia.
OR
Brand: Sparkfun

Shipping:

  • $6.95 Standard (2-4 days, tracked)
  • $9.95 Express (Overnight*, tracked)
  • $3 Economy Post* (3-7 days, no tracking)
  • FREE Pickup (Newcastle only)

Shipping costs may increase for heavy products or large orders.

Exact shipping can be calculated on the view cart page.

*Conditions apply, see shipping tab below.

It’s 2pm on a Tuesday and you find yourself at the test house with a design failing an emissions test. You quickly determine that you need to hack a filter onto your design but there is no space to do so. If only you had a simple board you could attach to the product. Introducing the Pi-Filter! This simple board gets the name Pi-Filter from its shape, which resembles the Greek letter Pi. It has two shunt capacitors with an inductor in between. In this C-L-C configuration, a person can quickly implement a low pass filter.

Why is this filter so popular? Simplicity and usefulness! With these three components, unwanted noise on a signal or power line can often be filtered out rather quickly. One very popular use for Pi-filters is in regulatory testing for conductive emissions. Conductive emission is when noise from electronics couples onto the interconnecting cables and passes into other equipment.

To relate an experience, when taking a new product through regulatory testing for FCC and CE Mark certifications, the product was failing conductive emissions due to noise from the switching power regulator. Hacking together a Pi-Filter on the DC voltage input signal, the noise was filtered out. While the PCB design had to be revisited to add the Pi-Filter footprint, that experience provided the inspiration to design a simple filter board for others to have in their test bag of tricks to resolve noise issues.

Experimental Product: SparkX products are rapidly produced to bring you the most cutting edge technology as it becomes available. These products are tested but come with no guarantees. Live technical support is not available for SparkX products. Head on over to our forum for support or to ask a question.

Documents

Documentation and Resources:

Product Comments

Exact shipping can be calculated on the view cart page (no login required).

We deliver Australia-wide with these options:

  • $3 for Small Items (3-7 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $9.95 for Express Post (Overnight for most of Australia, 2+ days for rural, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

Have a product question? We're here to help!