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You are so helpful. Thank you for assisting me with this.
Power supply powered, phone off. From power supply negative to switch negative side = 0 ohms. From power supply negative to switch positive = no connection at all.
Note that I managed to turn phone on occasionally when measuring...
Ok, I'll shop better transistor tomorrow.
I have been trying to understand this schema, and now my head is spinning. If we give positive voltage through 33k resistor to base, isn't the transistor conducting from emitter to collector? And once the power source goes down, emitter - collector is...
Could you check if I understood the option 2. correctly:
I happen to have this kind of leftover, can I use this in this case? https://pdf1.alldatasheet.com/datasheet-pdf/view/85016/IRF/IRL530N.html
I tried to connect diode IN4007 anode to capacitor positive and cathode to charger connector positive voltage (charger gives 5,2 V). But no luck. If I short capacitor positive to charger connector neg/ground (charger disconnected), then it will start next time powered. How to proceed :F
It works! Once.. :) Do I need to discharge the capacitor some how? It's 22 uF 50V electrolytic capacitor. Can I ask how did you calculate the correct capacitor for this, so maybe I can do it by myself next time? :)
Yes, and it works only if the press lasts over 2 seconds. Would any capacitor work here? Seen somewhere they put capacitor on pc start button, pc starts once plugged on the wall. They told that it conducts only short time, the needed time.
I have an old mobile phone with dead battery and broken power button. I can start the phone by short circuiting the power button pads for little over two seconds. Voltage between the pads is 1,7 volts.
I would like to have some automation for that, I want put my phone back in covers and want...
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