Hello,
please forgive me if I’ve posted this in the wrong section. I’m wondering if someone would be able to help me with what might be a simple problem but is not simple to me with my limited knowledge.
I have a latest generation Apple TV 4K which has had the power supply board removed so that it can run on 12v (you guessed it -it’s installed in a car!)
it’s worked perfectly fine - however it reboots itself while I’m cranking the engine - as the battery voltage drops down to 9.5v or so while the engine is being started.
I’m looking at adding some capacitors and a diode to discharge power to the Apple TV and keep it powered on for about 5 seconds or so while the engine is cranking.
I already know the basic circuit needed to be wired up to do this using a capacitor(s) and a diode - however - I don’t know how to calculate what value capacitor I would need to get the Apple TV powered for about 5 seconds or so.
I have found out that the Apple TV draws 1.083 amps of current While it is running. I’m unclear of exactly how low the voltage is able to drop before the Apple TV cuts out - however - once when my battery went a little flat - I found that the Apple TV would not boot up when the battery was putting out about 11v
I’ve already got a 1N5408 diode laying around that is capable of handle 3amps and 1000v - so I believe this would be suitable - I’m just not sure what spec of capacitor(s) I need to keep the Apple TV running for about 5 seconds without dropping to too far below 12v
thanks in advance for any help I get
- Tim
please forgive me if I’ve posted this in the wrong section. I’m wondering if someone would be able to help me with what might be a simple problem but is not simple to me with my limited knowledge.
I have a latest generation Apple TV 4K which has had the power supply board removed so that it can run on 12v (you guessed it -it’s installed in a car!)
it’s worked perfectly fine - however it reboots itself while I’m cranking the engine - as the battery voltage drops down to 9.5v or so while the engine is being started.
I’m looking at adding some capacitors and a diode to discharge power to the Apple TV and keep it powered on for about 5 seconds or so while the engine is cranking.
I already know the basic circuit needed to be wired up to do this using a capacitor(s) and a diode - however - I don’t know how to calculate what value capacitor I would need to get the Apple TV powered for about 5 seconds or so.
I have found out that the Apple TV draws 1.083 amps of current While it is running. I’m unclear of exactly how low the voltage is able to drop before the Apple TV cuts out - however - once when my battery went a little flat - I found that the Apple TV would not boot up when the battery was putting out about 11v
I’ve already got a 1N5408 diode laying around that is capable of handle 3amps and 1000v - so I believe this would be suitable - I’m just not sure what spec of capacitor(s) I need to keep the Apple TV running for about 5 seconds without dropping to too far below 12v
thanks in advance for any help I get
- Tim