Good afternoon. Guys, is there a way to make 24 Volt BP - 19.5 Volts PSU?
The network can't find something useful.
Is the laptop, for it needs charging 19.5 There are only 24 Volt power supply (from old printer). To buy there is no desire, as the laptop did not know that. Need a unit to even know included or not included =)
And if the 24 Volt PSU to connect something that will take 4.5 Volts, so will work? =)
there is a way simple, but "wrong"- take lm'ku to collect linear regulator -excess voltage will go into heat
there is a second way to disassemble the PSU to see the diagram to find the circuit responsible for feedback to modify and replace the resistor/Zener
To him with one hand, you need to connect your PSU, and on the other your laptop. Only here the output voltage will have to configure the voltmeter.
Daphne_Roob answered on July 9th 19 at 10:36
For a start tell full features of the printer power supply (24V you have voiced voicing peak current), then the same for the laptop power supply.
Most likely you will not get the desired power from the printer power supply.
Here's an example before my eyes the power supply from Canon - 24V, 0.7 A.
It is possible to about 0.85 And at 19.5 And this may not be enough for a laptop.
Iliana_Strosi answered on July 9th 19 at 10:38
If the unit is dismantled it is easier to wire 1 resistor(for standard circuit design of switching-mode power supply) to solder a trimpot and adjust to a voltmeter.