Re: [neonixie-l] Re: 555 power supply not working
Wot 'bout the coil? Is it suitable for the application? Magnus - Original Message - From: Matzenegger To: neonixie-l@googlegroups.com Cc: srpen...@gmail.com Sent: Sunday, July 29, 2012 3:38 PM Subject: [neonixie-l] Re: 555 power supply not working Hi all! I'm new here to, didn't know if it was best to create a new thread or relive an old one. I'm trying to build this same 555 power supply from the ledsales schematic http://www.ledsales.com.au/kits/nixie_supply.pdf . I don't have ready access to a scope (thinking about buying that cheap DS0201, but it'll take 2 months to arrive and I'd like to have my nixies fired up before that), but I'd like to see if you could help me troubleshoot my circuit. I built a test circuit for my 555 and it flashes the leds as expected. Did a brief test with the IRF740 and BC547 and they seem fine too. I was using the IN4004 and afetr reading this tread, changed to the UF4007. It didn't change the output. I simulated the circuit on ISIS, just to check. It worked... With 9.4V input I'm getting between 0.142V and 0.200V (changing diodes) where I should get 170V. I reduced my input all the way to 3.4V and got 3.2V output. Now talking about the things that looked weird to me with 9.4V input: - I measured the voltage before the diode and it gave me -0.21V from ground. - Changing my trimpot does no effect whatsoever (but I tested it). - Replacing IN4004 with UF4007 didn't change the output. - The MOSFET is NOT overheating. (it was in another configuration that I corrected). Anybody has any thoughts? Thanks, Sam -- 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/-/fFzzJtoXIiUJ. 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] Re: 555 power supply not working
Bingo. It doesn't give a resistance value. I'll get a new one and post the results. Thanks to you and al the guys that replied, and I'm sorry I couldn't reply as romptly as you did. See ya, Sam On Sunday, July 29, 2012 5:54:22 PM UTC-3, Frank Bemelman wrote: Must be something with the inductor. If the circuit does not work, you should at least get 9.4 volt at the other end of the inductor. Measure the resistance of the inductor, it should be low (10 ohm) and check its connections. *From:* Matzenegger samuel@gmail.com *Sent:* Sunday, July 29, 2012 3:38 PM *To:* neonixie-l@googlegroups.com *Cc:* srpen...@gmail.com *Subject:* [neonixie-l] Re: 555 power supply not working Hi all! I'm new here to, didn't know if it was best to create a new thread or relive an old one. I'm trying to build this same 555 power supply from the ledsales schematic http://www.ledsales.com.au/kits/nixie_supply.pdf . I don't have ready access to a scope (thinking about buying that cheap DS0201, but it'll take 2 months to arrive and I'd like to have my nixies fired up before that), but I'd like to see if you could help me troubleshoot my circuit. I built a test circuit for my 555 and it flashes the leds as expected. Did a brief test with the IRF740 and BC547 and they seem fine too. I was using the IN4004 and afetr reading this tread, changed to the UF4007. It didn't change the output. I simulated the circuit on ISIS, just to check. It worked... With 9.4V input I'm getting between 0.142V and 0.200V (changing diodes) where I should get 170V. I reduced my input all the way to 3.4V and got 3.2V output. Now talking about the things that looked weird to me with 9.4V input: - I measured the voltage before the diode and it gave me -0.21V from ground. - Changing my trimpot does no effect whatsoever (but I tested it). - Replacing IN4004 with UF4007 didn't change the output. - The MOSFET is NOT overheating. (it was in another configuration that I corrected). Anybody has any thoughts? Thanks, Sam -- 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/-/fFzzJtoXIiUJ. 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. To view this discussion on the web, visit https://groups.google.com/d/msg/neonixie-l/-/1jGjpzbR5AIJ. For more options, visit https://groups.google.com/groups/opt_out.
Re: [neonixie-l] Re: 555 power supply not working
That was it, just a bad inductor... Kind of ashamed now, but happy you helped me get this beauty working! Thanks! :D Sam https://lh6.googleusercontent.com/-FwF7XrMnC24/UBXwk1CtetI/ByU/2TS4cDbgyVI/s1600/IMG_0474.JPG On Sunday, July 29, 2012 10:21:25 PM UTC-3, Matzenegger wrote: Bingo. It doesn't give a resistance value. I'll get a new one and post the results. Thanks to you and al the guys that replied, and I'm sorry I couldn't reply as romptly as you did. See ya, Sam On Sunday, July 29, 2012 5:54:22 PM UTC-3, Frank Bemelman wrote: Must be something with the inductor. If the circuit does not work, you should at least get 9.4 volt at the other end of the inductor. Measure the resistance of the inductor, it should be low (10 ohm) and check its connections. *From:* Matzenegger samuel@gmail.com *Sent:* Sunday, July 29, 2012 3:38 PM *To:* neonixie-l@googlegroups.com *Cc:* srpen...@gmail.com *Subject:* [neonixie-l] Re: 555 power supply not working Hi all! I'm new here to, didn't know if it was best to create a new thread or relive an old one. I'm trying to build this same 555 power supply from the ledsales schematic http://www.ledsales.com.au/kits/nixie_supply.pdf . I don't have ready access to a scope (thinking about buying that cheap DS0201, but it'll take 2 months to arrive and I'd like to have my nixies fired up before that), but I'd like to see if you could help me troubleshoot my circuit. I built a test circuit for my 555 and it flashes the leds as expected. Did a brief test with the IRF740 and BC547 and they seem fine too. I was using the IN4004 and afetr reading this tread, changed to the UF4007. It didn't change the output. I simulated the circuit on ISIS, just to check. It worked... With 9.4V input I'm getting between 0.142V and 0.200V (changing diodes) where I should get 170V. I reduced my input all the way to 3.4V and got 3.2V output. Now talking about the things that looked weird to me with 9.4V input: - I measured the voltage before the diode and it gave me -0.21V from ground. - Changing my trimpot does no effect whatsoever (but I tested it). - Replacing IN4004 with UF4007 didn't change the output. - The MOSFET is NOT overheating. (it was in another configuration that I corrected). Anybody has any thoughts? Thanks, Sam -- 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/-/fFzzJtoXIiUJ. 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. To view this discussion on the web, visit https://groups.google.com/d/msg/neonixie-l/-/ITZ9tR9RrzgJ. For more options, visit https://groups.google.com/groups/opt_out.
Re: [neonixie-l] Re: 555 power supply not working
And just one question. I checked the shipping prices from Mouser and Digi-key. They were both between $100 and $120 for a single item. Is it always like this (I am in Europe). In Europe, you'd likely do better ordering from RS, Farnell, or even Jaycar or Futurlec. - John -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB. -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
RE: [neonixie-l] Re: 555 power supply not working
RS unfortunately stopped selling to private customers eric -Original Message- From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On Behalf Of John Rehwinkel Sent: vrijdag 25 november 2011 22:13 To: neonixie-l@googlegroups.com Subject: Re: [neonixie-l] Re: 555 power supply not working And just one question. I checked the shipping prices from Mouser and Digi-key. They were both between $100 and $120 for a single item. Is it always like this (I am in Europe). In Europe, you'd likely do better ordering from RS, Farnell, or even Jaycar or Futurlec. - John -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB. -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB. -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] Re: 555 power supply not working
Ages ago someone {Nick D ?} suggested a better modern FET.
If you really get stuck I can mail parts to you from Australia. For example
check this supplier :- http://au.element14.com/
John K.
- Original Message -
From: Imbanon imba.a...@gmail.com
To: neonixie-l neonixie-l@googlegroups.com
Sent: Friday, November 25, 2011 11:17 AM
Subject: [neonixie-l] Re: 555 power supply not working
...clip
So I would say that the problem really is in the cheap chinese
components! And hopefully, I will get a replacement soon! :)
And just one question. I checked the shipping prices from Mouser and
Digi-key. They were both between $100 and $120 for a single item. Is
it always like this (I am in Europe).
...clip...
--
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Re: [neonixie-l] Re: 555 power supply not working
On 11-11-19 02:27 PM, chuck richards wrote: You'll be amazed how much easier things are when you have an oscilloscope and can see stuff such as a 555 output. Just looking at e-bay and they have several scopes under 100 bucks, (of course reading fine print is important there.) I was only looking at e-bay canada, if you are in the US their are likely more that the seller will only ship to the US. I was surprised that both 10 and 100 Mhz units were all over the price map. Have a look for some less popular brands like Hitachi, telequipment, Leader or Kikusui Oscilloscope -- Charles MacDonald Stittsville Ontario cm...@zeusprune.ca Just Beyond the Fringe http://users.trytel.com/~cmacd/tubes.html No Microsoft Products were used in sending this e-mail. -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] Re: 555 power supply not working
If you're going to make a hobby out of electronics, buy an oscilloscope. It doesn't need to be fast. I use a dual-channel tektronix 100mhz scope that was built in the 80's. There are even PC based storage scopes now. -Adam On 11/18/2011 3:31 PM, Imbanon wrote: Also, how do I check if my 555 is oscillating without an oscilloscope? Thanks! -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
