www.elektronik.si

[geier]

Oj,

prosil bi za eno info, ce ima kdo pri roki Applov
MagSafe Power Adapter 60W (16v5 in 3A65) s konektorjem tipa L.

Ce lahko z instrumentom pomeri, ce je na pinih kaka napetost v mirovnem stanju,
ko je napajalnik na 230V, a brez PC.

Konektor je:
The second generation, L-shaped

Tukaj je PINout shema (1-5= minus, 2-4= plus, 3= ch.ctrl)


V stik je zaradi zvijanja prisla napajalna vrvica in sem to popravil,
ne vem pa ce je to vse.
Ali torej napajalnik zacne delati sele pod bremenom,
ali ima stalno napetost 16V5 tudi v stby.
Je pa napajalni kabel samo 2-zilni in nima dodatnega 'sense' kabla,
kot nekateri HPji.

Za primerjavo imam sedaj edino eno kopijo, ki ima stalno napetost,
vendar tudi magnet ni spojen na minus, kar pri originalnem je.

Zal nimam PCja, da bi enostavno probal.

Hvala

[mujo]

Popoldan lahko preverim. Sicer imam 85W verzijo, ampak mislim, da nebi smelo biti razlik.

[Preneseno iz google cache 27.03.2015]

[geier]

hvala ti ze vnaprej,

sem pa nasel se nakaj info, ce bo pomagalo se komu:
Kot kaze tukaj, gre za MagSafe 1.
Novejsi MagSafe 2 je malo daljsi ter ozji.

The inner large pins are V+ (14.5 / 16.5 / 18.5 / 20 V DC). Measuring with no load will give 6.86 V DC for MagSafe and
about 3 V DC for MagSafe 2; the full voltage is provided after a ~40kOhm load is applied for one second (vir: Wikipedia)


in pa naslednje na enem blogu, kjer opisuje se marsikaj na to temo:
The charger startup process
When the Magsafe connector is plugged into a Mac, a lot more happens than you might expect.
I believe the following steps take place:
1.The charger provides a very low current (about 100 µA) 6 volt signal on the power pins (3 volts for Magsafe 2).
2.When the Magsafe connector is plugged into the Mac, the Mac applies a resistive load (e.g. 39.41KΩ), pulling the power input low to about 1.7 volts.
3.The charger detects the power input has been pulled low, but not too low. (A short or a significant load will not enable the charger.)
After exactly one second, the charger switches to full voltage (14.85 to 20 volts depending on model and wattage).
There's a 16-bit microprocessor inside the charger to control this and other charger functions.
4.The Mac detects the full voltage on the power input and reads the charger ID using the 1-Wire protocol.
5.If the Mac is happy with the charger ID, it switches the power input to the internal power conversion circuit and starts using the input power.
The Mac switches on the appropriate LED on the connector using the 1-Wire protocol.

This process explains why there is a delay of a second after you connect the charger before the light turns on and the computer indicates the battery is charging.
It also explains why if you measure the charger output with a voltmeter, you don't find much voltage.

The complex sequence of steps provides more safety than a typical charger.
Because the charger is providing extremeley low current at first,
there is less risk of shorting something out while attaching the connector.



Ce je to vse res, potem mi bolj slabo kaze zaenkrat, ampak upanje ostaja

[mujo]

Jaz sem izmeril enake napetosti kot si jih napisal. Če drugo ne, vsaj nimaš kratkega stika

[Preneseno iz google cache 27.03.2015]

[DusanK]

@geier, Google nekje po svetu še hrani vsebino tvojega posta:
http://webcache.googleusercontent.com/search?q=cache:C8Qt3FQtADsJ:www.elektronik.si/phpBB2/viewtopic.php%3Ft%3D43025+&cd=1&hl=sl&ct=clnk&gl=si
Če lahko editiraš svoja prejšnja posta, ki sta v bistvu prazna zaradi težav z bazo, lahko prepišeš (copy/paste) tvojo vsebino nazaj iz zgornjega cachea n nadaljuješ to temo naprej.

Za vsak slučaj (ker Google cache ne traja večno) sem ti dodal še printscreen tele teme.

[geier]

[DusanK]

[geier]

Samo da zakljucim,

ostalo je edino, da se dejansko proba v zivo in
zadeva je enostavno zacela delati,

ceprav napetosti ne kaze, kot ostali.