With SCART, it's pin 16 that takes most of the current. It has an input impedance of 75Ω. This is because the original intention was fast overlay switching.
Pin 8 has an input impedance of 10kΩ.
So if your board only has a main +5V supply, this could supply pin 16. Then a voltage doubler (flying capacitor converter maybe, but the output voltage/ripple may be marginal) could be used to supply pin 8. But that means two power pins on the video connector.
Mark
Pin 8 has an input impedance of 10kΩ.
So if your board only has a main +5V supply, this could supply pin 16. Then a voltage doubler (flying capacitor converter maybe, but the output voltage/ripple may be marginal) could be used to supply pin 8. But that means two power pins on the video connector.
Mark
Statistics: Posted by 1024MAK — Wed Mar 19, 2025 1:47 pm