Need all of your threads on HOW-TOs, etc - Page 15 - Model Train Forum - the complete model train resource
Model Train Forum - the complete model train resource

Go Back   Model Train Forum - the complete model train resource > General Model Train Forum Discussion > General Model Train Discussion
Forgotten your password?

General Model Train Discussion Mostly anything goes, especially train related!


Reply
 
Thread Tools Display Modes
Old 01-28-2018, 03:29 PM   #141
T-Man
Yard Master & Research
 
T-Man's Avatar
 
Join Date: May 2008
Location: Seacoast, NH
Posts: 10,209
Scales Modeled: Lionel, S, HO
Images: 279
I like the earbud idea!

When small is a necessity I use 30 coated wire. Basically for winding motors or just jewelry craft. I was the smallest wire in the old Radio shack three pack
__________________
"T" stands for
Trains, Track, Trestles, and more Trains

How-To Column and Signature links Post number 4.


Links under O Scale Information


https://www.youtube.com/channel/UCkM...BLo3pJN1FGE1Gg
T-Man is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-15-2019, 03:18 PM   #142
traction fan
Station Master
 
traction fan's Avatar
 
Join Date: Oct 2014
Location: San Diego
Posts: 3,123
Scales Modeled: N
West Simple cheap LED tester

I use 3-volt, flat disc, watch batteries to test LEDs. The problem was that holding the leads to the battery was sometimes problematic, at best. This wasn't the case when testing a single 3mm or 5mm LED. Then I could simply fit the battery between the leads and squeeze a little. However, surface mount LEDs and circuits containing LEDs (ie. inside a lighted structure) were a very different story.
So, I made this simple gadget from a clothespin, two brass brads, some bits of wire, and two mini alligator clips. It works quite well. I drilled through the jaws of the clothespin then inserted the brads with their heads meeting inside the clothespin's jaws. I then soldered red(+) and black(-) wires to the brass brads, and cut off the excess length of the brads. I soldered the mini alligator clips to the other end of the red & black wire leads. For good measure, I painted the halves of the clothespin red and black so I could always be sure of polarity when inserting the battery. By the way, don't leave the battery in the clothespin when you're not using it. The leads have a nasty tendency to short to each other and deplete the battery. Also note that I did not include a resistor. With only three volts and limited on time, it's not really necessary to use a current limiting resistor, but you could easily add one if you want to.

Traction Fan

3v battery holder2.jpg

3v battery holder1.jpg

3v battery holder3.jpg
__________________
To Puget sound, Electrified!
traction fan is offline   Reply With Quote
Old 11-15-2019, 03:42 PM   #143
gunrunnerjohn
Admin
 
gunrunnerjohn's Avatar
 
Join Date: Nov 2010
Location: SE-PA, USA
Posts: 42,038
Scales Modeled: O-gauge 3-rail
Images: 3
Why not go with the fancy option for less than $3? I've worn one of these out plugging stuff in, I have a new one coming. It has all current ranges so you can test any type of LED.

Mini Handy 2~150mA LED Tester Test Box for Light-emitting Diode

gunrunnerjohn is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


» Visit These Sites:
LGB World

Or Our European Train Website ModelRailForum




All times are GMT -5. The time now is 07:19 PM.


Powered by vBulletin®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.