Search found 6 matches
- Thu Dec 03, 2009 6:05 am
- Forum: General Discussion
- Topic: cleaning battery contacts in solid state devices
- Replies: 7
- Views: 3360
Re: cleaning battery contacts in solid state devices
They used to sell these at Radio Shack. I found them online and bought a dozen. They work excellent for cleaning battery contacts and dull copper circuit boards. The only problem is the fiberglass strands break off, but once you know that, it's not a problem. I use them quite frequently in PC board ...
- Fri Oct 02, 2009 2:06 am
- Forum: General Discussion
- Topic: Happy 090909
- Replies: 4
- Views: 2687
Re: Happy 090909
Fixxer, My sympathies. Thanks- I really loved that dog. She is/was absolutely precious to me. At the vet, I connected the 9:09 AM part. It wasn't until I got home and entered the withdrawal in my bank account that I realized it was September 9th. It was only 3 weeks ago, but it seems like 3 years.
- Fri Oct 02, 2009 2:00 am
- Forum: General Discussion
- Topic: 4-20mA into 5V PIC A/D inputs
- Replies: 3
- Views: 2177
Re: 4-20mA into 5V PIC A/D inputs
I like it- thanks! I'm going to order a few from Digikey to experiment with.
BTW, reloading makes good sense these days
BTW, reloading makes good sense these days
- Thu Oct 01, 2009 3:54 pm
- Forum: General Discussion
- Topic: 4-20mA into 5V PIC A/D inputs
- Replies: 3
- Views: 2177
4-20mA into 5V PIC A/D inputs
I was wondering if anybody here might have some tips for connecting a 4-20mA sensor to the A/D input(s) of a PIC running at 5 volts. The sensor is a two-wire type run off of a 10-30 VDC supply. I have already got an op-amp circuit built, but I was looking for any pitfalls which might occur if, say, ...
- Thu Oct 01, 2009 1:08 pm
- Forum: General Discussion
- Topic: Happy 090909
- Replies: 4
- Views: 2687
Re: Happy 090909
On 09/09/09, my precious Italian Greyhound, Allegra, got very very sick, and I had to put her down.
The instant she stopped breathing, I looked at the clock on the wall: 09:09 AM.
So, 09/09/09, at 09:09, I will never forget.
The instant she stopped breathing, I looked at the clock on the wall: 09:09 AM.
So, 09/09/09, at 09:09, I will never forget.
- Thu Oct 01, 2009 1:01 pm
- Forum: Robotics
- Topic: How to record serial output to audio file
- Replies: 4
- Views: 4587
Re: How to record serial output to audio file
Heathkit's Hero 1 robot had a scheme to record programs to cassette tape, IIRC at 300 baud. It would take me awhile to find my notes, however. I remember using XR2206 function generator chips to implement modemlike circuits back in the 80s- 1125 Hz= Binary 0 and 2250 Hz= Binary 1. We used an XR2207 ...