Hi all.
My background in electronics is very limited.
I have recently done a level two in electrical installations and am now at the second year of my level 3 electrical installations.
As part of the level two, there was quite a bit involving electronics. Parallel and series circuits, some talking about capacitors and resister and diodes etc...
All this got me wondering and I have played a bit now with some electronics to a very small degree.
My first experience was as follows;
Water tanks 16.5Lt,
12V immersion brush-less water pump,
3 x 12V 10A relays
3 LED's "Green, Orange, Red"
2 floating switches
12V 22amh deep charged battery, "being charged by my solar panel 25W 12V"
The idea was to have the pump to get water from the outside water butt to be used on the shed, outside tap, to wash some garden tools. This water is also being warmed up by another circuit involving an immersion heater and a temp sensor switch, but this is another thing.
First relay, not energized, is feeding the green LED on one of the always on contacts = The tank is full.
Floating switch # 1 activates first relay when water level starts to drop. This could trigger the water pump but I din'd want to bring cold water in to water which is already warm, hence the reason for the second switch "Lower water level"
When relay one is energized it will also change the LED from GREEN to ORANGE.
When first switch is activated, it energizes the first relay and also feed one pair of always on contacts on the third relay that will trigger the water pump when energized. Once energized with the second switch, it will then use the correct from the first switch to loop it back to feed itself, no longer requiring the second switch to be on.
When second switch comes on, due to water level too low, it will engage relay 3 which will start the water pump and turn the RED LED on.
When lower water limit switch is turned off, the third relay remains operational as it now gets its power from switch 1 but this was also forcing power back to relay two and not changing LED from RED to ORANGE.
So, after looking at the circuit drawings for 5 minutes, it hit me. I need a DIODE. DIODE there and job done. Relay TWO now does stop working when switch 2 is off, pump still remains working and LED changes from RED to ORANGE.
This is, so far, my only experience in electronics, other than removing, testing and replacing some capacitors on some PSU to repair.
I apologize for the long intro.
Anyway, my next project is somewhat more involved.
There's an office with only one extension from the analog "50v" exchange for two people to work with.
There's two phones, one on each desk.
They are connected to a Y junction which connects them to the wall socket.
Now I'm thinking of some similar device that could, upon an incoming call, answer the caller and ask for "for user 1 press 1 for user 2 press 2" or by voice even like "would you like to speak to user 1 yes no answer sort of thing".
This was making only one phone ring, the phone for the right person and not have one user answering the call that more often than not to the other user.
I have worked building and repairing computers for the past 20 years so, something tells me I will have to use some sort of programmable chip that can control a relay to direct calls to either user 1 or user 2?
Any ideas or help in pointing me in the right direction is well and truly appreciated.
Once I get my mind up I will get it done, it's just a matter of how long will I take to get there.
Many thanks in advance.
Regards,
Albert
My background in electronics is very limited.
I have recently done a level two in electrical installations and am now at the second year of my level 3 electrical installations.
As part of the level two, there was quite a bit involving electronics. Parallel and series circuits, some talking about capacitors and resister and diodes etc...
All this got me wondering and I have played a bit now with some electronics to a very small degree.
My first experience was as follows;
Water tanks 16.5Lt,
12V immersion brush-less water pump,
3 x 12V 10A relays
3 LED's "Green, Orange, Red"
2 floating switches
12V 22amh deep charged battery, "being charged by my solar panel 25W 12V"
The idea was to have the pump to get water from the outside water butt to be used on the shed, outside tap, to wash some garden tools. This water is also being warmed up by another circuit involving an immersion heater and a temp sensor switch, but this is another thing.
First relay, not energized, is feeding the green LED on one of the always on contacts = The tank is full.
Floating switch # 1 activates first relay when water level starts to drop. This could trigger the water pump but I din'd want to bring cold water in to water which is already warm, hence the reason for the second switch "Lower water level"
When relay one is energized it will also change the LED from GREEN to ORANGE.
When first switch is activated, it energizes the first relay and also feed one pair of always on contacts on the third relay that will trigger the water pump when energized. Once energized with the second switch, it will then use the correct from the first switch to loop it back to feed itself, no longer requiring the second switch to be on.
When second switch comes on, due to water level too low, it will engage relay 3 which will start the water pump and turn the RED LED on.
When lower water limit switch is turned off, the third relay remains operational as it now gets its power from switch 1 but this was also forcing power back to relay two and not changing LED from RED to ORANGE.
So, after looking at the circuit drawings for 5 minutes, it hit me. I need a DIODE. DIODE there and job done. Relay TWO now does stop working when switch 2 is off, pump still remains working and LED changes from RED to ORANGE.
This is, so far, my only experience in electronics, other than removing, testing and replacing some capacitors on some PSU to repair.
I apologize for the long intro.
Anyway, my next project is somewhat more involved.
There's an office with only one extension from the analog "50v" exchange for two people to work with.
There's two phones, one on each desk.
They are connected to a Y junction which connects them to the wall socket.
Now I'm thinking of some similar device that could, upon an incoming call, answer the caller and ask for "for user 1 press 1 for user 2 press 2" or by voice even like "would you like to speak to user 1 yes no answer sort of thing".
This was making only one phone ring, the phone for the right person and not have one user answering the call that more often than not to the other user.
I have worked building and repairing computers for the past 20 years so, something tells me I will have to use some sort of programmable chip that can control a relay to direct calls to either user 1 or user 2?
Any ideas or help in pointing me in the right direction is well and truly appreciated.
Once I get my mind up I will get it done, it's just a matter of how long will I take to get there.
Many thanks in advance.
Regards,
Albert
