batteries - Using capacitors as a battery back-up - Electrical ...
Apr 6, 2022 · Fuses F1 and F2 are important. F1 protects the capacitor bank from destructive discharge (a.k.a. a big bang) should the DC link become shorted. F2 protects RLY1 and the associated wiring, since it wouldn't be rated for the full output current of 10-15A. The unsafe voltage on C2 is indicated in an energy-saving fashion by two indicators: X1 and X2.
How to capture, save, and rebroadcast an infrared signal?
Apr 13, 2017 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
STM32 GPIO Speed - Electrical Engineering Stack Exchange
Feb 25, 2019 · Most any very fast CPU or MPU have bus or GPIO pin speeds that require 10 ohm to 27 ohm resistors in series at the endpoint of the trace to prevent ringing and adjacent trace cross talk.
What happens when a ceramic bypass or decoupling capacitor …
Mar 8, 2022 · Too much voltage can cause the dielectric (insulating) layers to break through and become short circuits. Too much voltage can also cause the capacitor to flex, resulting in a stress crack. Then you get the same result as above. The capacitor becomes more like a resistor, or shorts out entirely - bang or burn. Neither failure mode is usually a ...
Why do consumer ovens use thermostats instead of PID + PWM?
Mar 21, 2021 · I've added a big N/C relay in series to the heater/thermostat circuit of my kitchen oven (don't tell the warranty people, and I didn't tell my wife until she caught me using it one day). With nothing connected to it, it just looks and behaves like a normal domestic oven. It cooks fine, and has a sawtooth temperature swing of 10 to 15°C.
Do you need high voltage or current to produce a spark?
May 22, 2018 · With one big thick lead shalt thou connect the coil to the distributor! Then shalt thou connect the distributor to the spark plugs, and with big-arsed thick leads as well. And with much insulation shalt thou surround the leads, so that thy current shall not leak. Then shalt thou crank the engine, and it shall go bang at the right times!".
battery charging - Do I need to fuse batteries in parallel ...
Aug 28, 2018 · If you have never seen one of the big T-series 400amp fuses go bang! you have likely saved pair of underwear. Fuses blow by melting metal, producing liquid metal which can be ejected to land on some other connections causing another fuse to blow.
Do capacitors automatically release their energy over time?
A big capacitor may hold a charge for some time, but I don't think you will ever get much further than 1 day in ideal circumstances. You should watch out if you have turned on the PC just 'a moment ago', but if you let it unplugged for a couple of hours and it will be fine.
Is it okay to use a power supply that provides slightly more …
The weird symbol indicates its a DC output. This laptop adapter supplies an output voltage of 19 V and a maximum output current of 3.42 A, well above your original adapter's 2A maximum.
What PWM frequency should be used for a solid state relay (SSR)
Apr 16, 2022 · I'd use even longer, like 0.1Hz and bit-bang the PWM if your microcontroller doesn't allow hardware PWM frequencies that low. Or just give up PWM and use some fuzzy logic in place of the PID. Temp control is pretty easy in thermostat mode (on/off). You can also estimate time to full power to make a 1°C change and integrate that into your fuzzy ...