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Author Topic: auto radio solid state vibrator for vintage tube radio  (Read 1925 times)
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PM3295
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« Reply #75 on: February 18, 2023, 12:35:50 00:35 »

If you want you can do it. I think a lot of people will prefer the simple design, to be honest. Something they can also quickly knock up on strip-board if they don't want to get a pcb. It will be more doable with standard TH parts. We will need a small 12V regulator (78L12) to supply the two chips if it is going to be used over 12 V. We don't need the zener then.
« Last Edit: February 18, 2023, 01:15:18 01:15 by PM3295 » Logged
sphinx
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« Reply #76 on: February 18, 2023, 12:55:50 00:55 »

ok i will use a 78L12 , was just starting with schematics and thought i'd make it smd going to change it to TH then. might be better when fiddling at home

i agree with you, if a simpler solution works good i would use it preferably.
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« Reply #77 on: February 18, 2023, 01:25:08 01:25 »

Maybe make it a 78L09, then it will still regulate with 12 V systems, as it requires 10.7 V input to maintain regulation. With the jumper you can select if you want the low 6 V operation.
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« Reply #78 on: February 18, 2023, 01:43:18 01:43 »

there are LDO types a 10v might work i will add a note about it
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« Reply #79 on: February 18, 2023, 01:46:07 01:46 »

I like the 78 series because they are really easy and cheap to get hold of. Nothing special. Old school.  Smiley
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« Reply #80 on: February 18, 2023, 03:08:15 03:08 »

I had to change the 4093 to 4011 since my breadboard test gave very limited adjustment due to the 4093's hysteresis band. I did not work as well like in Proteus.
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« Reply #81 on: February 18, 2023, 06:02:43 06:02 »

this is a simpler version 12v only with thru-hole components for making simply at home with a alsmost single layer boards

where there is only one trace that is on the top layer this trace is made si it can easliy be made with a wire

if there is no errors found this would be a final edit

have fun with it

if you want some extra info on the schematic sheet let me know.

have fun with it

« Last Edit: February 18, 2023, 06:29:20 06:29 by sphinx » Logged

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« Reply #82 on: February 18, 2023, 06:33:24 06:33 »

Don't you think having a jumper when 6 V operation is wanted will be a good option? Like I have it in my diagram.
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« Reply #83 on: February 18, 2023, 07:43:06 07:43 »

and i thought that was for sonething else, i will fix that, now i get it it was both 6v and 12v operation i thought it was 12v only thats why.

UPDATED !! with a jumper for 6v and 12v operation

Posted on: 2023-02-18, 07:07:23 - Automerged

i found an error in schematic now fixed

it will complain over missing gerber x2 files you disregardds this and delete those in "Generated Gergber X2"

i know this is a low voltage circuit, one can alllways make bigger spacing on IC1 voltage regulator. it coule make it easier to solder as well

do as you wish with it
« Last Edit: February 18, 2023, 02:01:42 14:01 by sphinx » Logged

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« Reply #84 on: February 20, 2023, 12:27:06 00:27 »

Here is an interesting book (+100 pages pdf) on the theory and design of vibrator-type-power supplies. Lots of info on the transformer design, etc. Link in txt doc.
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« Reply #85 on: February 20, 2023, 05:11:43 05:11 »

a simple vibrator may look simple but it is a lot of things to think of when making it and adjusting it, i starting to read document
and many interesting things one might not really think about

i recommend others to read it as well its a good book and i am even starting to read it
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laws of physics are not laws at all, just assumptions and formulas that work as long as we don't figure something new that wrecks the calculations. the infinite onion try to peel that one
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