Search found 16 matches

by reckerd
Wed Dec 17, 2008 11:06 am
Forum: Computer Programming
Topic: Microsoft Outlook
Replies: 3
Views: 1862

Microsoft Outlook

Are any of you Outlook 2007 gurus? I have had this problem happen before but I cannot find the solution I found before. What is happening is this. I customize the view by grouping by categories in an all collapse. When I click out of inbox and go back, the defaults have reapplied. I remember the “...
by reckerd
Thu Oct 30, 2008 1:30 pm
Forum: General Discussion
Topic: Redesign RF Generator
Replies: 4
Views: 1152

Redesign RF Generator

Can anyone tell me if they know of a way to replicate an RF signal with out using a tube?
I am attaching some schematics and would like to make the circuit but dont want to use a tube.
Thank you.
Image
by reckerd
Wed Oct 15, 2008 3:28 pm
Forum: General Discussion
Topic: B&K 467 CRT Tester & Restorer.....
Replies: 11
Views: 2427

I worked fine for me. Here it is long hand.
http://cgi.ebay.com/B-K-467-CRT-Tester- ... 286.c0.m14
Try a copy /paste
by reckerd
Fri Aug 15, 2008 2:21 pm
Forum: General Discussion
Topic: 5A Constant Voltage/Constant Current Regulator
Replies: 16
Views: 5463

The ciruit worked but took about 5 minutes to charge the caps. Also, I first connected my voltmeter to the load connections to see the range. My full range was 14vdc-17vdc. I really need the range to be 6vdc-20vdc. I didnt know what size transistor to use and since I had a 2N4401. I use it. R22 is a...
by reckerd
Thu Aug 14, 2008 6:06 am
Forum: General Discussion
Topic: 5A Constant Voltage/Constant Current Regulator
Replies: 16
Views: 5463

Looks great! I will try this circuit today.
Thank you, Reckerd
by reckerd
Wed Aug 13, 2008 7:36 am
Forum: General Discussion
Topic: 5A Constant Voltage/Constant Current Regulator
Replies: 16
Views: 5463

If there is a much simpler way then I am not married to this circuit. The bottom line is I need to have a way to charge the 2 two farad capacitors at voltages ranging from @ [email protected]. The only purpose of me wanting to control the current is to protect both of my circuits. (one the power supply, t...
by reckerd
Wed Aug 13, 2008 6:12 am
Forum: General Discussion
Topic: 5A Constant Voltage/Constant Current Regulator
Replies: 16
Views: 5463

Hello, What is the needed max output voltage for this app? 24vdc is the max surge rating for the caps. I was going to max the output at 20vdc. I would like to make sure of something. I connect pin 7 to input source which is 28vdc. Can I connect pin 4 to -12vdc? I have another power supply that I can...
by reckerd
Tue Aug 12, 2008 7:13 am
Forum: General Discussion
Topic: 5A Constant Voltage/Constant Current Regulator
Replies: 16
Views: 5463

Let me start from the beginning because I don’t think I have given enough information to adequately inform you on how to help. Sorry. I am building a capacitor welder. I am using 2 two farad capacitors and an SCR to do the work. I have been charging the caps using a Tenma laboratory DC power suppl...
by reckerd
Mon Aug 11, 2008 2:20 pm
Forum: General Discussion
Topic: 5A Constant Voltage/Constant Current Regulator
Replies: 16
Views: 5463

Thank you both for your reply's. I hooked up a DC motor and adjusted the current limiting pot from full resistance to no resistance but had no change. The reason the current limiting pot is important to me is to protect the power supply not the rest of the circuit. I am charging 2 two farad caps and...
by reckerd
Mon Aug 11, 2008 8:01 am
Forum: General Discussion
Topic: 5A Constant Voltage/Constant Current Regulator
Replies: 16
Views: 5463

5A Constant Voltage/Constant Current Regulator

Thank you for reading this post. I have built the charging circuit below on a breadboard and have tested the voltage adjustment and it works great. I can not figure out how to test the current side. So, my two questions are these. How can I test the current adjustment and how does this circuit adjus...
by reckerd
Wed Jul 02, 2008 10:42 pm
Forum: General Discussion
Topic: Variable regulating power supply circuit
Replies: 10
Views: 2928

Thank you so much for the great responses. I am looking foward to building it.
by reckerd
Tue Jul 01, 2008 7:51 am
Forum: General Discussion
Topic: Variable regulating power supply circuit
Replies: 10
Views: 2928

Its frequency of use will vary. Sometimes we will be welding 8 AA batteries together which equates to around 16 discharges. This is of course provided we got a good tack. If not then that number will increase. After that the unit may sit around for a couple of day before we need to use it again. At ...
by reckerd
Tue Jul 01, 2008 7:33 am
Forum: General Discussion
Topic: Variable regulating power supply circuit
Replies: 10
Views: 2928

Thank you for the responses. Since I don’t know how to draw out a schematic that can be uploaded to this listing I am going to attempt to spell it out. I have two 2farad car audio capacitors connected in parallel. I connected a large stud type SCR from one side of the cap to a copper pencil electr...
by reckerd
Mon Jun 30, 2008 5:36 pm
Forum: General Discussion
Topic: Variable regulating power supply circuit
Replies: 10
Views: 2928

Wow! its uses are almost limitless. I think this circuit will work. " 5A Constant Voltage/Constant Current Regulator " Do you think this will need special protection since I am using it in a capacitor welding circuit. Right now I am using a seperate power supply to charge the capacitors and an SCR t...
by reckerd
Mon Jun 30, 2008 2:25 pm
Forum: General Discussion
Topic: Variable regulating power supply circuit
Replies: 10
Views: 2928

Variable regulating power supply circuit

Hello, I need to build an adjustable regulating power supply circuit. I currently have a Power One 28VDC 3.6A power supply. I need to build a regulating circuit for the output that maxes at 24VDC and has a minimum output of 6VDC. I figure the Power One will regulate the current so I am not concerned...