Metal For Contacts SOLVED

Hi Folks, I'm looking for some metal to use for contacts similar to the strip in an old flashlight that connected the negative from the batteries to the bulb. Is that plated brass or tin? I need something flat that I can solder to and shape/cut rather easily.

by kalbinus
January 23, 2018

1 Answer

Answer by mikerogerswsm

Production switches usually have gold or silver coatings for reliability. The underlying metal can be tin or brass, or even phosphor bronze if it must 'spring'. In your application you could cut a sliver out of an old tin, this is easily soldered. Have medical kit ready, tin can be very sharp. Another item that I have used in the past is an old pot wiper, this worked reliably for many years. Your contacts will be kept clean if you can arrange 'wiping' action and supply several mA to 'burn' them in, or if lower dc current simply connect 0.1uF across them. There is also a variety of non-contact switches, such as micro-switches, optical switches and Hall effect devices.

ACCEPTED +1 vote
by mikerogerswsm
January 25, 2018

Your Answer

You must log in or create an account (free!) to answer a question.

Log in Create an account

Go Ad-Free. Activate your CircuitLab membership. No more ads. Save unlimited circuits. Run unlimited simulations.

Search Questions & Answers

Ask a Question

Anyone can ask a question.

Did you already search (see above) to see if a similar question has already been answered? If you can't find the answer, you may ask a question.

About This Site

CircuitLab's Q&A site is a FREE questions and answers forum for electronics and electrical engineering students, hobbyists, and professionals.

We encourage you to use our built-in schematic & simulation software to add more detail to your questions and answers.

Acceptable Questions:

  • Concept or theory questions
  • Practical engineering questions
  • “Homework” questions
  • Software/hardware intersection
  • Best practices
  • Design choices & component selection
  • Troubleshooting

Unacceptable Questions:

  • Non-English language content
  • Non-question discussion
  • Non-electronics questions
  • Vendor-specific topics
  • Pure software questions
  • CircuitLab software support

Please respect that there are both seasoned experts and total newbies here: please be nice, be constructive, and be specific!

About CircuitLab

CircuitLab is an in-browser schematic capture and circuit simulation software tool to help you rapidly design and analyze analog and digital electronics systems.