ericgibbs Well-Known Member Most Helpful Member Apr 27, 2009 #21 killjoy said: now thats clear to me. ^_^ who cause the diode to reversed biassed? Click to expand... hi, From the 12V supply when its measured after the diode, it will be 11.3V. So on the battery diode you have 9V on the Anode and 11.3V on the Cathode. Thats a reverse voltage on the diode of 11.3 - 9V = 2.3V As you may know a diode has to have a forward bias voltage of about 0.7V before it conducts. OK.? Last edited: Apr 27, 2009
killjoy said: now thats clear to me. ^_^ who cause the diode to reversed biassed? Click to expand... hi, From the 12V supply when its measured after the diode, it will be 11.3V. So on the battery diode you have 9V on the Anode and 11.3V on the Cathode. Thats a reverse voltage on the diode of 11.3 - 9V = 2.3V As you may know a diode has to have a forward bias voltage of about 0.7V before it conducts. OK.?
K killjoy New Member Apr 27, 2009 #22 ericgibbs said: hi, From the 12V supply when its measured after the diode, it will be 11.3V. So on the battery diode you have 9V on the Anode and 11.3V on the Cathode. Thats a reverse voltage on the diode of 11.3 - 9V = 2.3V As you may know a diode has to have a forward bias voltage of about 0.7V before it conducts. OK.? Click to expand... hehehe thanks a lot sir.
ericgibbs said: hi, From the 12V supply when its measured after the diode, it will be 11.3V. So on the battery diode you have 9V on the Anode and 11.3V on the Cathode. Thats a reverse voltage on the diode of 11.3 - 9V = 2.3V As you may know a diode has to have a forward bias voltage of about 0.7V before it conducts. OK.? Click to expand... hehehe thanks a lot sir.
K killjoy New Member Apr 27, 2009 #23 ah sir last question. will the battery supply immediately after the 12v is off?thx
ericgibbs Well-Known Member Most Helpful Member Apr 27, 2009 #24 killjoy said: ah sir last question. will the battery supply immediately after the 12v is off?thx Click to expand... hi, Yes it will.
killjoy said: ah sir last question. will the battery supply immediately after the 12v is off?thx Click to expand... hi, Yes it will.
forumlicker007 New Member Apr 27, 2009 #25 In your circuit I can't see the 7805 ground terminal.(or is that my vision problem? )
K killjoy New Member May 4, 2009 #26 ericgibbs said: hi, Yes it will. Click to expand... hello sir eric. sir can u make me a schematic where to position the multitester. so i can really know when my battery is not discharging when the 12v is connected. please thx. Last edited: May 4, 2009
ericgibbs said: hi, Yes it will. Click to expand... hello sir eric. sir can u make me a schematic where to position the multitester. so i can really know when my battery is not discharging when the 12v is connected. please thx.
ericgibbs Well-Known Member Most Helpful Member May 6, 2009 #30 killjoy said: bump bump* Click to expand... Please dont bump me, I bruise very easily... Set your DVM to current and connect the DVM in series with the output of the two diode cathodes and the input of the voltage regulator. The DVM will display the current into the reg and the battery. OK.?
killjoy said: bump bump* Click to expand... Please dont bump me, I bruise very easily... Set your DVM to current and connect the DVM in series with the output of the two diode cathodes and the input of the voltage regulator. The DVM will display the current into the reg and the battery. OK.?