Recent content by Inter

The MAX232 converter chip is incorporated into the DB9 connector housing. It is converting -12 volts into zero volts and +12 volts into +5 volts. The MAX232 chip is powered directly from PC RS232 port. At least I can save 2 pounds and not buy the USB to TTL cable :) Because I have a few dozen of...

Well, I have some very old CDMA mobile phone flashing cables with a built-in PC serial port to TTL converter. My understanding is that the built-in converter will convert -15 volts to zero volt and +15 volts to +3.3 volts.

Hi everyone, I'm new to the Forum. Just yesterday my Hikvision DVR unexpectedly stopped working all of a sudden. I didn't do anything. It was powered from an UPS power supply. At this time of the year power outages happen almost every night over here in Thailand due to frequent thunderstorms...