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  • CircuitWriter Precision Pen silver-based 4 grams - CW100P
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CircuitWriter Precision Pen silver-based 4 grams - CW100P


Price: $21.07 & FREE Shipping on orders over $35. Details
Only 3 left in stock.
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$21.07 & FREE Shipping on orders over $35. Details Only 3 left in stock. Sold by Express Health and Fulfilled by Amazon. Gift-wrap available.


Product Description

Draw traces on circuit boards, repair defective traces, make jumpers, shield electronics, design prototype circuits and repair rear-window heater traces.

Product Information

Technical Details
Brand NameCAIG Laboratories
Item Weight1.6 ounces
Product Dimensions7.1 x 3.7 x 0.4 inches
Number of Items1
Manufacturer Part NumberCW100P
  
Additional Information
ASINB00B88B9KI
Best Sellers Rank #8,025 in Office Products (See top 100)
Shipping Weight1.6 ounces (View shipping rates and policies)
Date First AvailableAugust 2, 2008
  
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Customer Questions & Answers

Customer Reviews

3.6 out of 5 stars

Most Helpful Customer Reviews

52 of 52 people found the following review helpful By dthrckt on November 4, 2010
First, shake this stuff really well before you use it and after every few seconds of use, otherwise you'll end up w/ less solids in the fluid when it is almost empty (still works but is thinner and runs easily).

I've used this to repair a few circuits. First one was my multitester - ammeter stopped working, opened it up and could see where some solder had flaked off the board where a connection was made with that instead of a trace in the board.

I've primarily used this as a solder substitute for assembling battery packs and making repairs where soldering was difficult or impossible. The product is almost like a conductive glue - it sets up pretty hard and with mild adhesion. If several coats are applied it does have decent strength, at least enough to handle the connection gently. Be sure to allow it to dry completely between coats and before testing or reinforcing the connection (its hardly conductive before drying, which is good if you screw up). Once it is set up I put a thin coat of jb weld over it to physically secure the connection.

This has allowed me to repair several devices that would otherwise have been junk, for example, a pet collar that could not be disassembled and had a broken power connection to the board. It is awesome for battery packs. I can wire them together instead of using AA battery holders, which are bulkier, restrict you to the shapes available and have a higher resistance. I just finished assembling nearly 200 nicad AAs and used less than two pens. Radioshack has this same product for $10.

I use it too fast for it to dry up on me. There is a thinner/cleaner available and the same stuff can be bought in little jars.

Wipe the tip before storing, store it with the tip pointed up and it won't get plugged.
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25 of 26 people found the following review helpful By Chuck Gosh on September 11, 2011
This stuff is incredible. Here's how it works.

Shake the bottle, remove the cap, press the tip against a surface, squeeze the tube and some goo comes out. It's about the consistency of Elmer's glue. It's conductive. It dries in about 5-10 minutes. It's a modest glue with silver particles mixed in it. If I want additional strength, I'll use a toothpick or straight pin to add some Shoe Goo (silicone, slightly flexible) or a little dab of hot-melt glue once everything is electrically secure.

To create a trace as thin as you like, cover the surrounding area with two strips of scotch tape so there's a thin gap between them. Squeeze a small dot on a piece of scrap paper, pick up a bit with a toothpick or straight pin, and paint the work area or just apply directly to the work from the tube. When it's dry, just peel off the tape and you'll have an absurdly thin, perfect, conductive trace.

As an experiment, I once created a circuit that fit entirely on the top of a 9-volt battery snap -- that's a pretty small area for a handbuilt circuit. It consisted of two 16-pin integrated circuits (LM556 timers), 8 surface-mount capacitors, 4 surface-mount resistors, 4 LED's (that flashed sequentially when triggered), wire connections, ground and power buss lines, and a piece of wire used as a switch. The twin buss lines were laid on top of the IC's, and the capacitors, resistors and wires were all connected directly to the IC's legs. Altogether there were 36 connections made with this stuff. It was actually pretty easy to do.

This level of construction is impossible without Circuit Writer.

It's also perfect for electromagnetic sealing of mating surfaces used in radio-frequency circuits.
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18 of 20 people found the following review helpful By Po Nien Lu on September 19, 2010
I used it to repair my rear window defroster and it worked nicely. However potential buyers must be aware that the tip of the "pen" is more like the tip of a squeeze correction fluid pen, not those of paint pens or ball pens. It means it is very hard to draw a straight, fine line using this pen, especially on the inside of a car rear window. And since the lines it draw are gray-ish white, they are very visible (and ugly) when seeing from the outside of the car. You can use some tapes to cover the surrounding area and make the result looks better, but it will be a lot more work.
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17 of 21 people found the following review helpful By Juan Carlos Berenguer Esteban on April 2, 2009
Verified Purchase
I use this for a couple of years from now. Is a good product, I often use it to revive old remotes, gamepads and cellular keypads, you can brush the old conductor finish with a mid abrasive eraser and then apply a coat of this, the contact behaves as new again. The only complain is than the ink inside the marker dries too quick in the tube, I almost lost one third of the content on every market I have, I wish I know how to dilute them without damage or loss the conductive properties, I need to run this test with various alcohols, tupertine or solvents.
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7 of 8 people found the following review helpful By James on May 6, 2011
Verified Purchase
This worked very well and was the only way I could think of to fix the burnt copper "lines" on my dash board circuits for the dash guage lights of a 1977 Mustang. I had never done this type repair ever, and within 3 hours ( I let it dry like instructions said) I had all the lights working and was re-installing the guage cluster in the car.
In some places the circuit board sheeting with the copper traces (lines) on it was raised and wavy and since you need to press a bit hard on the pen's tip to make the stuff flow, I slid a wood ruler under it to provide support under the bad spots and then drew in new lines. I fixed 4 bad places and became concerned with one bigger one (1 Inch long) that didn t want to work or show a circuit when I tried using a tester. HOWEVER, as soon as it dried I had a compleated circuit !
I did not have a hair dryer to heat the repairs like the instructions said to do, but did use a small portable bath room heater to help speed things up. A hair dryer would have been perfect.

This circuit board is not available to buy, so this was really important for me to fix as 4 of 5 lights were out, and with no experience except reading about this type stuff on line, I choose this pen. A GOOD CHOICE. And it worked very good, and is fairly easy too. Shake well and often and go fix it !
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