...on the same die. Heat generated by the passive pull-downs or pull-ups limited the upward scaling of transistor counts. CMOS solved that problem....
I am OK with UPS as I clear my own customs, if sent UPS express, they cover the B3 entry cost.
DHL you don't have the option, AFAIK.
...a value under C$20 are duty and tax free. I avoid DHL and FED-EX and UPS (in that order) because of these experiences and try to get things via post....
No all commercial ones , but mostly industrial ones should have this feature
So all UPS power supplies everywhere have this buck-boost feature?
The inverter has buckboosting or amplification. It's job is to maintain a clean non distorted AC waveform at 120VAC
If the switching point is designed to be close to 115 volts, why do the UPS devices keep working with no battery when the AC power line is as low as...
The UPS inverter circuit will maintain a clean non distorted AC waveform at 120vac with an lower AC input or low battery DC input.
with no battery? or the battery is at 90VDC?
If the switching point is designed to be close to 115 volts, why do the UPS devices keep working with no battery as low as 90 volts?
Because the UPS wants to switch over as close to 115vac , that is what UPS designers set the threshold point of switching over
90 volts? Not 80 volts? Why is that?
So that means I can expect every UPS everywhere to work without a battery until the power line gets to 90...
...of the circuit and and use an AC variac to lower the AC input and measure the cut off or threshold of the UPS switch over point which is about 90VAC
To answer your question
actually UPS power supplies can have the AC voltage very low without any change to the DC output and ripple
...NVRAM, CMOS, NMOS, etc., think about the bigger picture. You can keep a clock working just fine without a UPS, battery bank, and engine generator.
...at node X and the black probe at any of the cathodes, I'll have ... [ups, maybe I have 0.7V at node X instead of 1.4V]. Ok, 0.7V at node X when both...
...feature I am trying to implement for preventing unexpected motor start ups (accidents)
I believe that I will need a relay ???? but I don't know how...
Thanks for the replies! Attached a couple of close-ups here...
...if you're going to intermix CMOS and TTL logic. You should put pull-ups on the CMOS inputs being driven by TTL to insure correct operation (1K-10K...
You are correct, I just had a quick look at the datasheet and that device has built in pull ups. That was my mistake :p
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