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Hi,
My goal is to make device that passes through gigabit Ethernet and passive POE and at same time to use some energy from POE.
My idea is to use ETH transformer with ethernet ports on both sides, connect center taps of both ends and use bridge rectifiers to get power.
Does this look correct...
Hi!
I need to realize backup battery with boost converter in my design.
To minimize battery current I need to keep boost converter disabled until main power is lost.
Switching to backup battery should be uninterrupted.
Main power: 8V
Battery: 3V
Boost coverter: 7V
Could you recommend any...
Probably I didn't clarified my need clearly.
I am planning to use UVLO to prevent battery from discharging too much. That's why power consumption of switched off DCDC is important.
Probably I could go with larger hysteresis and have x0uA consumption in turned off state.
Thanks guys for your...
I am looking at tps54202
If I need 11.8V/11.5V ON/OFF thresholds then v divider should use 6.3k+720Ohm resistors (that's 1.6mA)
Increasing ON voltage to 11.9V reduces current to 0.15mA and 12V to 80uA.
And that's all with my circuits target idle current (between wakeups) of tens of uAmps.
I...
Hi Guys,
I am thinking how to better realize disabling power of circuit in undervoltage situations.
Many DCDC converters have UVLO at about 2.8V that could be suitable for 1 cell battery, but I am designing 12V battery powered circuit.
Some DCDC also have adjustable UVLO, but because I need to...
Hello,
I am looking for good quality image sensor that has composite video output, horizontal and vertical sync outputs and possibility to sync frames between 2 sensors (cameras).
One sensor that seems to be OK is OV07960. It is one chip solution and should be easy to solder.
Maybe someone can...
Thank you for your fast reply. I will try 10k to GND.
You mentioned about simple circuit :) I have found also this little more complicated circuit but it works on 9V: https://forum.tsebi.com/viewtopic.php?f=4&t=23#p248
Is it better in some way?
I prefer 5V voltage. Maybe you know some simple...
Hi guys,
I am trying to integrate video splitter in my hobby project. I have studied one splitter available and draw schematic of it.
I have soldered this circuit but it is not working. Can you guys look at circuit. Maybe I draw it incorrect. I am dumb in analog electronics and transistors...
Thanks.
Still thinking is there any changes in operation when using LDO in dropout state. Maybe less current ...
I am thinking to use MIC5205-4.0YM5 not to operate in dropout, but I used internal reference for ADC 4.096V :( I think it will be OK to use stabilised 4V.
Hi guys.
I have situation where mu circuit is used with power sources usually rated at 5V. They give out something like 5.2V. But there are also 6V regulators that people want to use.
I have ICs that handle 3.6V - 5.5V. They also work on 6V but I want to make some protection to be correct with...
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