Search found 1294 matches

by Lenp
Tue Dec 26, 2006 5:54 am
Forum: General Discussion
Topic: Toner transfer pcb irony
Replies: 10
Views: 2495

Dean, I tried Oxyclean and it worked, but, seemingly not as well as oxalic acid. The oxalic acid comes as crystals and a solution is made as directed, or stronger! I sprayed (watch out for the mist) it on the stained fiberglass laundry tub and it was gone! Maybe Oxyclean is a product that contains s...
by Lenp
Tue Dec 26, 2006 4:24 am
Forum: General Discussion
Topic: Toner transfer pcb irony
Replies: 10
Views: 2495

What is the tinning product used in the PCB video? I could not catch the info from the flick! I have used Tin-It and don't care for it. I also use ammonium persulfate instead of ferric chloride, and, in a heated tank it's about as fast, much cleaner but more expensive. To clean up ferric chloride st...
by Lenp
Tue Dec 26, 2006 4:15 am
Forum: General Discussion
Topic: Toner transfer pcb irony
Replies: 10
Views: 2495

I just caught up with this interesting new post and am wondering if there are any advantages in this method over the TTS (blue) method for board making. We've used the blue film since it's introduction, making hundreds of prototype and small production runs and am curious if it would be worth switch...
by Lenp
Mon Dec 18, 2006 9:28 pm
Forum: General Discussion
Topic: Thermostat hack
Replies: 21
Views: 3284

If you are looking for an indicator for "Burner On' what about an exhaust stack temp sensor, bimetal or whatever. The milivolt system probably has too little output to do much more than it does, without amplification. The milivolt generator is likely just a thermocouple, or a group of seres junction...
by Lenp
Wed Dec 13, 2006 4:37 pm
Forum: General Discussion
Topic: Is SCA still active, and alive?
Replies: 4
Views: 1045

Is SCA still active, and alive?

Years ago SCA (Subsidiary Communications Authorization) was a big thing in FM broadcasting, residing typically 67Khz from the main carrier. Muzak, Physician's Radio Network, Talking Books for the blind and stock quotes were some of the broadcasts. Although they were for the most part pay services, k...
by Lenp
Wed Dec 13, 2006 6:06 am
Forum: General Discussion
Topic: Radio Shack fires person with experience in Electronics
Replies: 23
Views: 6161

At the height of the the Radio Shack success I remember buying huge boxes of returned 'defective' merchandise, for a few dollars a box. The manager said the warranty repairs cost HIM money and not corporate so he decided to dump them off at whatever he could get. Most of the 'defective' items were s...
by Lenp
Mon Dec 11, 2006 5:36 am
Forum: General Discussion
Topic: Electric water heater questions
Replies: 22
Views: 6017

Another thought.. In large buildings a domestic hot water recirculating loop is used. A small pump moves hot water from whatever heats it, circulates it around the building and returns it for reheating. The loop is tapped to provide hot water to the fixture using as short a path as possible. A time ...
by Lenp
Mon Dec 11, 2006 4:15 am
Forum: General Discussion
Topic: Radio Shack fires person with experience in Electronics
Replies: 23
Views: 6161

It's a little late but here's a slant on this topic... Recently one of our specialty distributor with a sales force that cut their teeth in the field was bought out by a larger group. The employees, who really had hands-on smarts that helped customer make product choices were told to dumb down. Say ...
by Lenp
Sun Dec 10, 2006 2:32 pm
Forum: General Discussion
Topic: Electric water heater questions
Replies: 22
Views: 6017

markp, you're right on target! By way of a little more info, the HWH draws the water from the top of the tank. It also uses a long pipe (dip tube) inside the heater to provide the cold water to the bottom of the tank. Because of stratification, the top water will be hotter than the bottom. So, when ...
by Lenp
Wed Dec 06, 2006 12:35 pm
Forum: General Discussion
Topic: BATTERY BOOM!
Replies: 43
Views: 10853

Hackelsup, welcome to the thread! Other opinions are always important. The exploding batteries I have associated with were in two different environments, so, at the risk of redundency, here's the information . Battery #1 The battery with no cell access, was installled on a garden tractor, operating ...
by Lenp
Tue Dec 05, 2006 9:49 pm
Forum: General Discussion
Topic: BATTERY BOOM!
Replies: 43
Views: 10853

rshayes...

Only one comment...

Q.E.D.


Len
by Lenp
Tue Dec 05, 2006 8:54 pm
Forum: General Discussion
Topic: BATTERY BOOM!
Replies: 43
Views: 10853

Hi guys, ....and thanks for the warm (or was it hot) welcome! Earlier I was really wondering what was going on, but the reality checks, and looking over some previous posts, now make the vision quite clear. Tis a funny thing how dangereous a little education can be! Sorry if any one person takes off...
by Lenp
Mon Dec 04, 2006 4:13 am
Forum: Computer Programming
Topic: BASIC to PIC
Replies: 18
Views: 8025

cwaugs No difference of opinion here, but, why do you feel PicBasic it is the best? There are so many options I am just trying to separate the wheat from the chaff! The real issue I have is porting from the pBbasic platform to a PIC. I have several products that were developed some time ago with pBa...
by Lenp
Sun Dec 03, 2006 3:50 pm
Forum: General Discussion
Topic: BATTERY BOOM!
Replies: 43
Views: 10853

Philba, thanks again,

I was getting a little wary about halfway through the recent baptism by fire Several times I checked the URL to make sure I was at the right place and hadn't been redirected, to outer space!

Len
by Lenp
Sun Dec 03, 2006 3:06 pm
Forum: General Discussion
Topic: BATTERY BOOM!
Replies: 43
Views: 10853

Well thanks Tom!

Yup I certainly have! I must say that the welcoming committe was, well, just a little different!
Neverless, I'll be checking in to see what's cooking!

Len