Good manners would suggest KatieandDad owes jung4g an apology. I assume he did by PM. 😕
If an apology is in order I certainly offer one.
My comment was not aimed at this post in particular.
A lot of posts go dry because people either give up or get their project going.
Sorry jung4g if I offended you.
My comment was not aimed at this post in particular.
A lot of posts go dry because people either give up or get their project going.
Sorry jung4g if I offended you.
DEFINITE OVERKILL
BUT. you could build a SLOW START circuit that places your 221R resistor in circuit until C1 is charged, then short it out once it is charged.
Its probably cheaper just to buy a 24V Wall-Mart supply. SMPS supply ,may have same issues though.
30Va toroid ($15 from Amazon). W005 Bridge $1. Two small caps (Dont need to be huge as you've got 30000uF in B1).
Now you know the problem you can experiment.
BUT. you could build a SLOW START circuit that places your 221R resistor in circuit until C1 is charged, then short it out once it is charged.
Its probably cheaper just to buy a 24V Wall-Mart supply. SMPS supply ,may have same issues though.
30Va toroid ($15 from Amazon). W005 Bridge $1. Two small caps (Dont need to be huge as you've got 30000uF in B1).
Now you know the problem you can experiment.
I personally think this is a waste of money as the better solution would be a dedicated Tr/Br/C/R/C solution.
However, something along these lines would work.
A 24V relay should pull in OK at 18V.
Using a slightly larger series resistor for the B1 supply would have the added advantage of reducing turn-on thump as the B1 would come on slowly.
I think you'll find that a 30VA transformer and a 24V relay will be almost the same price.
However, something along these lines would work.
A 24V relay should pull in OK at 18V.
Using a slightly larger series resistor for the B1 supply would have the added advantage of reducing turn-on thump as the B1 would come on slowly.
I think you'll find that a 30VA transformer and a 24V relay will be almost the same price.
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These are absolute peanuts.
http://www.amazon.co.uk/MULTICOMP-3...ODTE/ref=sr_1_1?ie=UTF8&qid=1327329599&sr=8-1
This is what I used.
Must be comparable bargains in the Foreign parts of the World. This one is multi Primary so will suit most applications.
http://www.amazon.co.uk/MULTICOMP-3...ODTE/ref=sr_1_1?ie=UTF8&qid=1327329599&sr=8-1
This is what I used.
Must be comparable bargains in the Foreign parts of the World. This one is multi Primary so will suit most applications.
I've been reliably informed that the B1 will work perfectly up to about 35V.
Therefore an unregulated 24V Wall-Plug should be perfectly OK.
Therefore an unregulated 24V Wall-Plug should be perfectly OK.
That is true, but be VERY sure that you have electrolytic caps rated for the higher voltage!!!!!!!
Too True.
Not sure where I got the BOM for for mine but I used 35V caps for C1 and C2.
C2 is only half the VCC, it is C1 that receives the full applied Vcc.
Not sure where I got the BOM for for mine but I used 35V caps for C1 and C2.
C2 is only half the VCC, it is C1 that receives the full applied Vcc.
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