Monaural and Multichannel Sound - Solid-state Devices and Analog Circuits - Day 11, Part 6

[@W1RMD]

I've learned something new! Thanks and take care!

[@Toshinoriyagi1]

Thanks a lot sir, the way you teach is very good and it makes it easy for us to understand! Thank you

[@Vocademy-Electronics-Tech]

Thank you for the complement. I really appreciate it.

[@vestepharpersuasion]

It's amazing how simple yet useful the white board drawings are, but it also takes an intelligent person to create simple but useful diagrams - thank you!

[@Vocademy-Electronics-Tech]

Thanks for the complement. I would like to make nice computer graphics but to do so would requires weeks between videos.

[@vestepharpersuasion]

​@@Vocademy-Electronics-Tech My desire was to convey the idea that: Your simple diagrams that you draw on the whiteboard are very useful, even helpful to create a more complete understanding. Thank you 🙂!

[@1rstcar]

Thanks for your videos. @ 1:37 , What prevents this mono configuration from overloading the Amplifier??

[@Vocademy-Electronics-Tech]

The system is a standard PA system so there is nothing unusual about the system itself. Being in North America this is probably a 70-volt system. Each speaker is attached in parallel through a transformer. To get the effect I heard at the resort the installer simply needed to reverse the polarity of the wires for every other speaker.

[@tnamen1307]

Hello, Over 11 months have passed and still waiting.... for request about identification of wires for car reverse camera. In general, it has 5 wires which are camera power, camera ground, video power, video ground and shield wire. What voltage readings should be on the video power? Is video ground always constant ground or it still carries some negative voltage signal too? Can you please make new videos especially on identifying these 5 wires with digital multimeter when no wiring diagrams are available at all??? Please 🙏

[@Vocademy-Electronics-Tech]

I apologize, but you seem to misunderstand the purpose of this channel. I am presenting a series of lectures on basic electronics. I have no plans to make technical support videos. I have installed two reverse cameras but these only had four wires, Ground (shield), Camera Power, Camera Signal and one wire to connect to the wire going to the reverse lights (to tell the head unit when to show the reverse camera). Otherwise, I will have to defer this question to another viewer who has experience with installing such cameras.

[@tnamen1307]

@Vocademy-Electronics-Tech okay thanks for the information Sir 🙂 Here is my update... Finally, I identify all the wires. The stereo head unit has 5 pin connector at the back side. Earth, Cam Power, Video Power, and 2 are constant ground. In fact, earth and these 2 wires are joined together and at always constant ground. Now, that I have 2 cameras, one for reverse and another for front. Both has 4 wires which are Camera Power, Camera GND, Video Power and Video GND. Now, I planned to activate one camera at a time ONLY. My question is that can I joined together the Camera GND wires of these 2 cameras and then further joined or connected to the Camera GND pin of the above-mentioned stereo 5 pin connector so as not to reroute GNDs separately for these 2 cameras???? Same case for Video GNDs of these 2 cameras. Can they be joined commonly to the Video GND of the stereo unit? Of course, only one of the 2 cameras will be activated through a relay, and their corresponding Camera Power and Video Power will also be arranged so that they get connected to the respective Camera Power and Video Power of the stereo unit.