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  • Ultimate 555 Timer/Oscillator KIT (Through-Hole)
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Ultimate 555 Timer/Oscillator KIT (Through-Hole)

by Ramsey

Price: $21.95 + $6.29 shipping
Only 18 left in stock.
Ships from and sold by Ramsey Electronics®.
  • Onboard Start and Reset switches
  • Onboard Pulse Width contro
  • Onboard output drivers
  • Assembly Required

Product Details

  • Shipping Weight: 12.8 ounces (View shipping rates and policies)
  • ASIN: B004E24IXA
  • Average Customer Review: 4.0 out of 5 stars  See all reviews (1 customer review)
  • Amazon Best Sellers Rank: #225,972 in Electronics (See Top 100 in Electronics)
  • Date first available at Amazon.com: November 25, 2013

Product Description

First brought to market in 1971, the 555 timer has been a staple in the electronics world ever since, and the Ramsey UT5 timer kit has always been one of our top sellers. The UT5 provided a quick and easy way to harness the power of the 555 timer IC - a valuable tool for any electronics hobbyist! But there is only so much you can do with the UT5 before you start running into its limitations. We knew people wanted a kit that would let them do more with the 555 timer, so to that end, we present the brand new UT5A series kit. This new series builds on the classic UT5 kit, but takes it to a whole new level! We've packed it with tons of features that you won't find in any other 555 timer kit on the market. You can configure it on the fly with easy-to-use jumper settings, drive relays, and directly interface all timer functions with onboard controls or external signals. All connections are easily made though terminal blocks. Plus, we've replaced the ceramic capacitor of other timer kits with a Mylar capacitor which keeps your timings stable over a much wider range of voltages!

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Most Helpful Customer Reviews

1 of 1 people found the following review helpful By Ken Coar on May 2, 2012
Verified Purchase
The instructions were clear, spare parts were included, and it worked properly the first time I tried it. (Which really quite amazed me, since I'd never worked with SMT before, and speaks well of the quality of the product and its instruction.)

That being said..

I expected a little more general-purpose unit, rather than having to choose a particular range of output frequencies and pulse widths and solder in the appropriate components. I would prefer to be able to select the R/C components via jumper, and jumper a diode across the discharge resistor to decouple the mark time and rest time.

That's why 4 stars rather than 5.

I bought this SMT (surface-mount technology) kit without really noticing the 'SMT' part of the name. This was the first time I've worked with SMT components, and it'll probably be the last -- but that has nothing to do with the quality of the product. Having a tremor and suboptimal vision, I was seriously dismayed at the miniscule size of the parts. Fortunately I have a 'helping hands' stand (Hawk MG8950 Helping Hand Magnifier with Stand), but a set of non-magnetic tweezers is virtually a necessity -- and I don't have any of those handy. At least when I inevitably dropped parts on the patterned rug, I could find most of them with a magnet.
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