Re: [neonixie-l] LC-531 and SN74141 problem
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
[neonixie-l] LC-531 and SN74141 problem
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: 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 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/-/gXhxb1b78DEJ. For more options, visit https://groups.google.com/groups/opt_out.
Re: [neonixie-l] LC-531 and SN74141 problem
There is a chance that you have a bad 74141. I would try disconnecting the 74141 inputs from your uC and try grounding them all. Does everything turn off? try pull one of the inputs high and verify that the correct number is lit. I'd do this before proceeding. If the 74141/Nixie circuit works fine disconnected from the uC, then you've got a uC problem. Figure out where your problem is before you proceed any further. -Adam On 10/15/2012 9:57 AM, mpestkow wrote: 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: 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 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/-/gXhxb1b78DEJ. 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.
Re: [neonixie-l] LC-531 and SN74141 problem
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 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) 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: and program MCU with that code. 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 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/-/gXhxb1b78DEJ. 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.
