Maybe someone here can help me. I'm looking for a simple, affordable +5V regulator for a TDA1541 DAC in a CD player but I just can't figure it out.
Maybe a shunt reg from Ebay? Any suggestions?
Only other options I can think of are LM7805 or LM317 based reg but I need something better that's still cheap and not too time consuming to put together.
Maybe a shunt reg from Ebay? Any suggestions?
Only other options I can think of are LM7805 or LM317 based reg but I need something better that's still cheap and not too time consuming to put together.
That sounds good. Is there a schematic of this? Do I only put a BC547 before the LM317 or do I need to add a resistor and decoupling cap to the BC547 as well?
edit: so 10k resistor and 3.3uF cap as well? Can I use something cheaper and smaller than a huge film cap?
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The configuration of the BC547 is a common capacitor amplification circuit. Just google for a schematic....
If you want to apply such a circuit before the LM317, mind the restricted current capabilities (and power handling) of the BC547.. You might want to use an other transistor or darlington.
Hi,
I used a flea for +5V regulator in my TDA1541 player, if you buy the parts from ray it's about 25euro iirc.
It was a big improvement but having good +/- 15v regs was also a big improvement.
Regards
Pete
Regards
Pete
Sorry, I forgot. If you use a flea for the 5v you need to add/change some bits to up the current output. I can't remember where I got the info but I guess it was the flea forum on the pink fish site.
Can I find one somewhere for <€50 including all the parts and shipping to Belgium? If not, a Tentlabs shunt regulator may be the way to go.
I also really want to try the Flea clock upgrade but the cost of a Tentlabs XO module is kinda holding me back.
I don't think so, but if you get a bare PCB you can build it yourself and that will be cheaper. It will take some time sourcing all the parts though.
As for the Flea, you could put a 5x7mm SMD oscillator on it, from Crystek for example. They also have good low-jitter specs and are less expensive. It can be a bit problematic finding the odd CD frequency, but some manufacturers issue free samples if you ask them nicely
Regards,
Ray
As for the Flea, you could put a 5x7mm SMD oscillator on it, from Crystek for example. They also have good low-jitter specs and are less expensive. It can be a bit problematic finding the odd CD frequency, but some manufacturers issue free samples if you ask them nicely
Regards,
Ray
The SAA7220 draws about 200mA. Don't bother with the emitter-follower for such a reg - just use CRC before the tracking prereg. Something like 1000 / 4.7ohm, 2W resistor / 1000uF will do the same job with only 1v drop-out. make it 2200uF if you like. Simple, brute-force and effective filtering
bigger chassis
As things seem to have gone quiet thought I would post a partially complete drawing of a larger chassis I have been working on for the CD63.
The largest piece being 3mm steel which I have yet to get copper plated and the lid 1.2mm stainless steel.
I would rather have a one box player than a separate box for transformers.
not sure I have uploaded the picture correctly till I post.
As things seem to have gone quiet thought I would post a partially complete drawing of a larger chassis I have been working on for the CD63.
The largest piece being 3mm steel which I have yet to get copper plated and the lid 1.2mm stainless steel.
I would rather have a one box player than a separate box for transformers.
not sure I have uploaded the picture correctly till I post.
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