Search found 71 matches

by Finn Hammer
Mon Oct 23, 2017 2:32 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Criticize my neutron detection setup
Replies: 18
Views: 6392

Re: Criticize my neutron detection setup

https://m.facebook.com/CaptainBoden/posts/pcb.481489032212898/?photo_id=10213717948120484&mds=%2Fphotos%2Fviewer%2F%3Fphotoset_token%3Dpcb.481489032212898%26photo%3D10213717948120484%26profileid%3D1105757771%26source%3D48%26refid%3D18%26ref%3Dbookmarks%26_ft_%3Dqid.6480113569472499619%253Amf_story_k...
by Finn Hammer
Mon Oct 23, 2017 12:45 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Criticize my neutron detection setup
Replies: 18
Views: 6392

Re: Criticize my neutron detection setup

I have almost given up trying to find an Xray transformer, and have started thinking more often about making my own high frequency supply with ferrite transformer from scratch. But that's another story. Silvio, If you live in the states, you could get in contact with The Geek Group, they have offer...
by Finn Hammer
Thu Oct 19, 2017 3:16 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Input source for HV multiplier
Replies: 7
Views: 2256

Re: Input source for HV multiplier

There is a teardown of an Ikea unit, haven't watched it, but it might be usefull:

http://kaizerpowerelectronics.dk/electr ... ve-part-1/

Hope this helps,

Cheers, Finn Hammer
by Finn Hammer
Tue Oct 17, 2017 1:37 pm
Forum: Vacuum Technology (& FAQs)
Topic: An interface to the MKS 901P transducer
Replies: 14
Views: 6012

Re: An interface to the MKS 901P transducer

Good grief, the bug report. Boards arrived yesterday, so has been soldering all night. There is a bug in the boards, not a serious one, but nevertheless one that needs adressing. If you look attentively at this picture, you will see that C2 does not have a path to ground. bummer.JPG This is bad, bec...
by Finn Hammer
Sun Oct 15, 2017 8:17 pm
Forum: Vacuum Technology (& FAQs)
Topic: An interface to the MKS 901P transducer
Replies: 14
Views: 6012

Re: An interface to the MKS 901P transducer

Richard,

Thank you for your kind words.
This program takes up about 55% of the Pro Mini's memory, but there is a Teensy with 256k, so there is still hope.
Although a Teensy would be overkill for this simple application.

Cheers, Finn Hammer
by Finn Hammer
Sun Oct 15, 2017 12:13 pm
Forum: Images du Jour
Topic: Fusor progress, Finn Hammer
Replies: 25
Views: 8401

Re: Fusor progress, Finn Hammer

Treasure!!!! To be accepted as a customer by Sigma Aldrich is not a trivial task, but finally I passed through the eye of the needle, and the bottle arrived yesterday, I cannot tell you how happy I am. IMG_20171010_091138.jpg Together with this reduction valve: IMG_20171015_134544.jpg The gas delive...
by Finn Hammer
Sun Oct 15, 2017 10:18 am
Forum: Vacuum Technology (& FAQs)
Topic: An interface to the MKS 901P transducer
Replies: 14
Views: 6012

Re: An interface to the MKS 901P transducer

All, As noted elsewhere on this site, if the coding bug gets under your skin, it gets itchy, and due to that, I had to get some ideas off the way. Since there are 3 different units of pressure that the 901P can respond with, as well as the fuspeak variant, 4 in all, this project would be incomplete ...
by Finn Hammer
Fri Oct 06, 2017 10:34 am
Forum: Vacuum Technology (& FAQs)
Topic: An interface to the MKS 901P transducer
Replies: 14
Views: 6012

An interface to the MKS 901P transducer

All, Edit: 07-10-2017, I have updated the view of the gerbers, as well as the gerber file.rar to a version where there is no dip switch to isolate the TTL/RS232 module during code upload. How to communicate with the 901P has been covered in detail in this thread, which you should read for background...
by Finn Hammer
Fri Sep 29, 2017 4:15 am
Forum: Vacuum Technology (& FAQs)
Topic: MKS 901p
Replies: 58
Views: 29873

Re: MKS 901p

Pablo, Richard Thank you for your kind words. I am using this little rs232/ttl converter board: https://m.ebay.com/itm/5PCS-Mini-RS232-To-TTL-MAX3232-Converter-Adaptor-Module-Serial-Port-Board-/131700206049?hash=item1ea9f1a9e1%3Ag%3A3DgAAOSwpHFZaYDa&_trkparms=pageci%253A666a7a8d-a4cb-11e7-8dec-74dbd...
by Finn Hammer
Wed Sep 27, 2017 7:44 pm
Forum: Vacuum Technology (& FAQs)
Topic: MKS 901p
Replies: 58
Views: 29873

Re: MKS 901p

All, The first version of my code had a couple of shortcomings, which has now been ironed out. Firstly, it did not comply with the fu-speak pressure unit system. fu-speak?? Confused?, well so was I. Pressure units were never easy, and the world has odd preferences when it comes to expressing the val...