Відео

Mike I follow your commentary on beechjet I will be getting my first plane this week citation v .. funny I found this video randomly .. I hope I can take the landings without the trailing link .. I’m not a pilot just the owner

Wow, Awesome video!

Nice video, first time I've seen the wiper blades actually used in an MU2 video. Thanks for the putting info on the right side of the screen.

I found this in my lab. Can this be connected to a computer and is there any software associated with the DC source? I would appreciate your help.

I smoked a few circuits before I realized this problem. I thought my design was bad :-( It is a horrible bug -- even for a low cost supply.

The power - off burst can burn 0,5A fuse like nothing. Really bad :-(

I have the power supply PPS2116A and I like some of the functions - especially the memories. Unfortunately there are some bad sides of the PPS2116A. The rotation knob is made with low quality encoder and after a few months/years it is really not reliable - very difficult to operate. But the worst is that the PPS2116A can easily damage your circuits. It already destroyed a few of my electronics, mobile phone, AM meters fuse etc. How it is possible? When you turn off the PPS2116A and you do not DISCONNECT your circuit, the PPS will send cca 30V for 200ms to the outputs. They can be ON or OFF it does not matter, the 30V is sent to the outputs. Realy bad design!!! I can send a osciloscope screenshot for all the cycle: Power on - out On - Power off. There the pulses are clearly seen.

Wires in nacelle.

Is there any way to fix this with some external circuit? I got used to removing connectors every time I shut it down but that is annoying.

I have smoked circuits with this supply for this exact same startup pulse.

Thanks for sharing! Unless your unit is flawed, it's an unbelievable bad design... Guess I'll better find another supply manufacturer... :-(

I see that it's set for 1V, 5.0 Amps...

Yes, I believe this is correct. A brief look at the circuits inside shows that it has a transistor follower output stage and that the base drive of that transistor floats to about 28 volts in the first second of turn on, then goes away. Looks like the opamp regulator circuits default to high voltage during that time, which is bad. I'm sure some suitable RC startup circuit somewhere in the design, even if it was directly across the base drive, would solve this problem.

Looks like it simple floats as a 25v supply with no control from the micro controller. You can see once the micro controller finishes initializing the display the output is properly regulated again. I can't see why it wasn't designed so the output is disabled by the analog circuitry until the digital logic comes online :(

I didn't test those parameters but I believe them to be fine. The Power supply was fairly accurate in terms of voltage and current readings, so it wasn't bad except for this very serious and fatal problem. You simply can't have it blow up boards if the CA mains drops out for a minute and comes back.

That's a bad flaw. How is it with ripple and stability?

Nice video MC.