Hello,
You should not place a linear regulator (7809) between the
transformer and the boost switching supply. Go ahead and remove it. The
only components I would place between the transformer and the input to
the high voltage supply are maybe a 1n4007 protection diode and one or
two bypass caps.
Also, the reason your transformer is reading 18.7v is because it was not
loaded when you measured it. All transformers are like that, you just
have to design for it. :) Also, it's somewhat important to use
transformers that are rated for something close to the current draw that
you intend. A 100w 12v transformer isn't ever going to sink down to 12v
if your design only draws 5w.
-Adam
On 10/16/2012 3:22 AM, mpestkow wrote:
Hi,
First of all *jrehwin* - thank you for a very detailed answer, it is
great to know that there are such a great communities in the Internet.
I've just resolved my problem thanks to you guys. So what I've done:
- changed the resistor to 47k
- set HV source to ~170V
- add normal diode in 5V line.
I think that my problem was caused by few things at once, but I think
the main was how I set voltage sources. Because of lack of good,
stabilized voltage source I have something like this:
- From AC 230V i have 12V DC power supply (Made in China, so I
realized that this is actually 18,7V )
- I connect it to my breadboard and than branch it to 7805 and 7809
stabilizer (with capacitors ofc)
- Output from 7805 goes to logic
- Output from 7809 goes to mentioned voltage converter and becomes
170V which is my HV line
Thank you very much for all ideas and help. Today I will make an upper
board for Nixie Clock (tubes+ TLP627 optocouplers for multiplexing)
and start to develop logic board (I'm going to use
ATtiny2313+PCF8583+74141). As an alarm sound I will use old-school
electric doorbell with metal chime.
Regards,
MP
On Monday, 15 October 2012 23:29:29 UTC+2, Judas wrote:
Hi,
just tray to change value of anode resistor. 10k is to high for
this tube, so finally all digits glow together.
Tray this:
R=(190V-140V)/0.002A=25k
Regards
Krzysztof
Dnia 2012-10-15 18:57 mpestkow napisał(a):
Hi all,
That's my first post, but I hope I get an answer to my huge
beginner problem. So, I've recently started to build my own
Nixie clock. I have four LC-531
<http://www.tube-tester.com/sites/nixie/data/lc-531.htm> nixie
(Polish production) gathered from old Unitra Multimeter. All
of them works fine when I'm trying to connetct it to HV source
(Voltage converter 9V->150-220V - schematic
<http://mirley.firlej.org/files/P9150_Schemat.gif>) I'm using
~*180-190V *and *10k* resistor (*is it good?*).
Few days ago I finally get some 74141 and I was trying to test
it, so I connected it to ATtiny2313 like this:
[Zewnętrzna grafika zostala zablokowana ze względów
bezpieczeństwa.] <http://i.imgur.com/1a6Lw.png>
and program MCU with that code <http://pastebin.com/j62JTyVv>.
It should count on Nixie lamp from 0 to 9 (2 sec per digit).
Double checked all my connections and*as the result I've got
Nixie lamp with all digits glowing in the same time. *
I also checked 74141 using LED diods (+ to 5V and - to 74141
outputs) and it works fine (diodes light one after another)
*Any suggestions what I'm doing wrong? It seems to in some way
all outputs are connected to GND when using HV to my nixie
(works fine with LED).*
EDIT If I'm missing any electronic part here, please provide
me info how to connect it and how it will help, I 'm Software
Engineer and unfortunately, I'm not good in whole electronic
stuff (yet :) )
--
You received this message because you are subscribed to the
Google Groups "neonixie-l" group.
To post to this group, send an email to
neoni...@googlegroups.com <javascript:>.
To unsubscribe from this group, send email to
neonixie-l+...@googlegroups.com <javascript:>.
To view this discussion on the web, visit
https://groups.google.com/d/msg/neonixie-l/-/gXhxb1b78DEJ
<https://groups.google.com/d/msg/neonixie-l/-/gXhxb1b78DEJ>.
For more options, visit
https://groups.google.com/groups/opt_out
<https://groups.google.com/groups/opt_out>.
--
You received this message because you are subscribed to the Google
Groups "neonixie-l" group.
To post to this group, send an email to neonixie-l@googlegroups.com.
To unsubscribe from this group, send email to
neonixie-l+unsubscr...@googlegroups.com.
To view this discussion on the web, visit
https://groups.google.com/d/msg/neonixie-l/-/OBmodi3PIi4J.
For more options, visit https://groups.google.com/groups/opt_out.
--
You received this message because you are subscribed to the Google Groups
"neonixie-l" group.
To post to this group, send an email to neonixie-l@googlegroups.com.
To unsubscribe from this group, send email to
neonixie-l+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
