Power supply XL-500

[Alexismex]

Hello furum,
I have tested POWER SUPPLY OF THE XL500
It is OK 100%, please take your protoboard and test in 10 minutes...i have
and i thing all the schematic is good!!!!
Have nice day
Alexis

[georgi.g.zhelev]

Hello furum,
I have tested POWER SUPPLY OF THE XL500
It is OK 100%, please take your protoboard and test in 10 minutes...i have
and i thing all the schematic is good!!!!
Have nice day
Alexis

Hi, Aleximes! I think you're wrong! Look again shematic of PS XL 5OO. OK?

!!!!! 7905...pin 2...GND....-5v ok!!

[kt315]

who is wrong... decide yourself

good luck

[Alexismex]

Hello Georgi and KT 315,
TRUST ME i have proto it 100% OKKKKKKKKKKKK
OPEN YOUR EYES PLEASE!!!!
and take your solder pen o proto board and test it lazy boys , it is allright
do not confuse the student of PI .....

[homefire]

Confused! Why Fix that that is not broke?

[kt315]

Hello Georgi and KT 315,
TRUST ME i have proto it 100% OKKKKKKKKKKKK
OPEN YOUR EYES PLEASE!!!!
and take your solder pen o proto board and test it lazy boys , it is allright
do not confuse the student of PI .....

I trust you (FULL TRUST!), but you are wrong. thinking you need more learn Theory Of Relativity of Albert Einstein's Carl, I ask you... be judge in this long disagreement.

[porkluvr]

The circuit "ground" is the output of the 7812. That's the cold end of the coil and where the receiver input is referenced.

Without some sort of level shifting (as in Deltapulse) the amplifiers need to have +/- 5V centered about ground. Am I correct so far?

For the LM317 to make another +5V on top of ground, it will need to output +17V referenced to the battery negative terminal. That seems highly unlikely with the +18V battery input, even with a fresh battery.

And what would happen to the +5V supply if the battery dropped to +16V?

[georgi.g.zhelev]

XL500 POWER SUPPLY

XL 500 POWER SUPPLY, a good decision!

[Alexismex]

Hello Georgi,
I know very well this design from Eric Foster because i draw it PAPA Alex is me....

[Geo]

.....................

[georgi.g.zhelev]

XL 500

Hello Georgi,
I know very well this design from Eric Foster because i draw it PAPA Alex is me....

Alexismes, I congratulate you for the good work!
G.L.

[mikebg]

The correct drawing

Alexis, recently you began to manifest haste and negligence. Unlike the excellent circuit diagrans that you have posted so far, the circuit in your posting # 1 has several shortcomings:
A. No such symbol GND in the circuit diagram.
B. Missing fifth rail B+ feeding TX end stage.
C. The circuit should be powered after switch S1.
D. Misleading voltage +12V instead 0V.
E. Misleading symbol COM instead IN
F. Missing rail name -12V.
I took the liberty to correct your circuit because with advancing years I began to become a perfectionist (but also to make more mistakes:-).

[Alexismex]

Hello Mike,
Thank you for revision of the schematic (because it wasnot mine) ,
I did not put the word GND in the schematic because the symbol I for me say GND
and the TX voltage is obvious but it is good to write like you say
For the regul 7905 i put the number wright for input , output and com this is important
for the student who make this power supply ,it work at the first time if he respect all the input output and com of each regulator....
my reaction post is because people say this PS did not work .
thank you again
alexis.

[georgi.g.zhelev]

PS XL500

PS XL 500

[georgi.g.zhelev]

PS XL500

PS XL500 EROR!!
ERROR! d1 revers; GND, +12 V AKU !