Hobby Electronics Basics

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Hello, I have a simple circuit for a time delay. Small problem is that it does not switch entirely as I want. With a tr...
4 comments posted 21yrs
posted by frank
4 comments posted 21yrs posted by frank

superconducting devices

Where can I find fabrication details for quatratran(quasiparticle trapping transistor), a superconducting device.
2 comments posted 21yrs
posted by saru_pokharel
2 comments posted 21yrs posted by saru_pokharel

Minimum Load?

Hey Everyone I'm looking at building a simple bench top power supply with a DC output. I've found a simple circuit whic...
5 comments posted 21yrs
posted by ed
5 comments posted 21yrs posted by ed

wireless

Hi, Is there any pic microcontroller or any other that has a wireless transciever build or that I could easily add the t...
1 comments posted 21yrs
posted by hash4you
1 comments posted 21yrs posted by hash4you

Odd behavior

My father asked me a question recently for which I had no good answer. Here was the problem he described: "we had a thu...
2 comments posted 21yrs
posted by rspinks1
2 comments posted 21yrs posted by rspinks1

Building an isolation transformer

Hello I would like an isolation transformer (1:1) for the UK mains. I can't seem to find any off the shelf designs thou...
5 comments posted 21yrs
posted by ed
5 comments posted 21yrs posted by ed

Software for PIC 16F876

Hello, I want to built a simple datalogger with a PIC 16F876, and found a nice schema on the net. My problem: te softwa...
2 comments posted 21yrs
posted by agfri
2 comments posted 21yrs posted by agfri

Electric car

Would two large capaciters be cheaper than batteries to drive an electric car. Say a couple of 2 farad capacitors. Capi...
5 comments posted 21yrs
posted by Rodneykelp605
5 comments posted 21yrs posted by Rodneykelp605

Achieving the right Cap Size

Does anyone know of a web site, or a simple way of getting the right caps to add up to the number I want. Heres what I...
23 comments posted 21yrs
posted by news
23 comments posted 21yrs posted by news

Question about Casio fx-115MS

What does the Rnd key (SHIFT 0) (in the lower-left corner) on the Casio fx- 115MS calculator do, and how is it used? An...
30 comments posted 21yrs
posted by jdcrane7
30 comments posted 21yrs posted by jdcrane7

RFI with PC speakers

My 2.1 speaker system "PC Works" by Cambridge Soundworks is picking up quite a bit of RFI. It's manifested in audible w...
2 comments posted 21yrs
posted by movsw
2 comments posted 21yrs posted by movsw

Triac Circuit Not working right ?

I have built a circuit based on. It uses a Triac and a Optoisolator 3031 to turn power on. http://www.uoguelph.ca/~anto...
11 comments posted 21yrs
posted by stacy
11 comments posted 21yrs posted by stacy

Video through antenna?

I have a little black and white sony watchman, and I want to wire up a little video camera to it. The problem is, the w...
1 comments posted 21yrs
posted by alex
1 comments posted 21yrs posted by alex

Re VA vs Watts

Thanks to everyone who replied to my question. I now understand the distinction. And it makes sense too! Cheers, Eric R...
0 comments posted 21yrs
posted by etpm
0 comments posted 21yrs posted by etpm