Many thanks to Upupa (and all the others of cource) for helping me.
Still having some questions:
1. Capacitor C3 must be closer to LM4780 or it's ok?
2. Input capacitor (1u) must be MKT or better MKP?
3. Is VISHAY SFERNICE RPL3 a good choise for the output resistors?
4. Are lines Vee, Ground and Vcc lines to close one another?
Still having some questions:
1. Capacitor C3 must be closer to LM4780 or it's ok?
2. Input capacitor (1u) must be MKT or better MKP?
3. Is VISHAY SFERNICE RPL3 a good choise for the output resistors?
4. Are lines Vee, Ground and Vcc lines to close one another?
Don't know about vishay, but I use IRC resistors, http://www.irctt.com/pages/index.cfm
The exact ones I use are the 0.1 ohm 1% tolerance ones from: http://www.irctt.com/pdf_files/PPW.pdf
The exact ones I use are the 0.1 ohm 1% tolerance ones from: http://www.irctt.com/pdf_files/PPW.pdf
Hi Bill
I don't understand your ground node. Either it doesn't make sense or I need to learn more about it.
Why does it loop around like that and use a jumper? Why not just come off the end of the ground line? And why not just connect to R13 there (rather than jumper to the short lead)? Isn't it (electricly) all the same node?
Nice work btw.
Thanks-
b
I don't understand your ground node. Either it doesn't make sense or I need to learn more about it.
Why does it loop around like that and use a jumper? Why not just come off the end of the ground line? And why not just connect to R13 there (rather than jumper to the short lead)? Isn't it (electricly) all the same node?
Nice work btw.
Thanks-
b
bill1961 said:You mean something like this:
How about something like this?
Also, if you use the smaller resistors (5mm spacing, 3.2mm body length, 0.5w), you can make the feedback paths shorter and the board smaller.
EDIT: looks like you beat me to it, as I was referring to the earlier design..
--
Brian
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