Did you read the guide?
P.S. OK I see you are reading it. F twisted together, S twisted together. If for just 30mA load, use 8R2 R101, 3 green leds.
P.S. OK I see you are reading it. F twisted together, S twisted together. If for just 30mA load, use 8R2 R101, 3 green leds.
Yes in your case it will be plenty enough. Use one led, 1k resistor, 3k trimmer in the voltage section, all unused positions jumper.
Many thanks. I feel real progress has been made today. I am currently using an SPower regulator in this circuit and it will be interesting to compare.
Chris
Chris
The dummy load resistor value to be used for testing. Is there a preferred value resistance for this assuming 12V output and a current draw of 0.03A? Do I calculate it from Ohm's law? I can see 5W power rating should be enough.
Chris
Chris
A 390R would simulate your 30mA load draw at 12V. But anything form 330R to 470R would serve the purpose. Your consumption and voltage range is low, so even a 2W dummy would do. The idea is to test a reg for target use, set it, without chance of jeopardizing a real circuit as load while tweaking.
if you plan to use a shunt regulator then the CCS feeding the shunt must deliver more current than the worst case maximum demand of the client circuit (FM4).
If 30mApk is the worst case demand then the CCS should be set for 30+X mA.
X can be any value >=1mA. I would suggest you aim for setting the CCS in the range 60mA to 100mA.
Note that the FM4 has a compartment housing the 3pin regulator. One does not have much room to fit in a BiB.
HI
with 36VA the 63v caps are not too low ? I like 63v parts...
Nick your great build , with separate box, we use two psu caps one x box ...you use the resistor for pgreco filter or just the wire..
thanks
with 36VA the 63v caps are not too low ? I like 63v parts...
Nick your great build , with separate box, we use two psu caps one x box ...you use the resistor for pgreco filter or just the wire..
thanks
Can I use this diode VISHAY GENERAL SEMICONDUCTOR|1N5399-E3/54|STANDARD DIODE, 1.5A, 1KV, DO | element14 Malaysia instead of MUR120?
It seems can support higher current and faster as compare to MUR120.
It seems can support higher current and faster as compare to MUR120.
Capacitor position C301, 201, 101 is same as C302, 202, 101. Is that to be fill by either a film 4.7-10uf MKT or a 220uf electrolytic cap? And not both? It is the same as position C103, 203, 303 and C104, 204, 304.
Any diode meeting the power needs will work in the bridges. Your intuition/choice. MUR are well accepted by diyers and easy to find, thus they got proposed.
Those capacitors choices are explained thoroughly in the guide. Those near the output better be MKT plus R107,207,307 1R. 47uF polar caps and that resistor position be a jumper are reserved to battle oscillation if it rarely happens a bad interface to reactive load situation.
The C101,102 etc. Its better the 220uF polar if the application is a high gain or other noise sensitive situation. Else, just an MKT since it normally presents a more open tone. Some had used the polar, and bypassed it underneath with a small MKP.
Those capacitors choices are explained thoroughly in the guide. Those near the output better be MKT plus R107,207,307 1R. 47uF polar caps and that resistor position be a jumper are reserved to battle oscillation if it rarely happens a bad interface to reactive load situation.
The C101,102 etc. Its better the 220uF polar if the application is a high gain or other noise sensitive situation. Else, just an MKT since it normally presents a more open tone. Some had used the polar, and bypassed it underneath with a small MKP.
I have ready the regs for +7Vout & -3Vout to feed the Jim Hagerman Piccolo phono headamp that draws 6Vdc to 24Vdc @15mA, how many current have I to adjust? 100mA seems to be very reasonable for the Piccolo, right?
I have 15R 5W on hand