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Power to chips. Here's something that happened to my neighbor: I was coding firmware at a networking equipment manufacturer, and Jimmy the hardware guy was in the next cubicle. He was tearing his hair

Yes, especially back with the TTL devices.? I did encounter it a lot when working on machines that used a LOT of TTL - I'm not sure exactly what chips, but some boards (card rack based devices) would

Hi Mike, Just by coincidence, there is an explanation about how low voltage can damage a display on today's posts: /g/BITX20/topic/82625127 Hopefully, this will help, if your

Bob, Have you noticed increased current draw when feeding less than the recommended voltage? Exactly what sort of electronic device was this? In my experience, that would be very unusual. Jerry, KE7ER

Hi Mike, I'm not positive but I thought there was only two versions of the 5” Nextion. In not quite sure what the difference is between the two. I bought the Nextion “Enhanced” 5” display

Not really necessary to clean off "Slopware 10" before installing Linux.? Just select to use the whole drive when installing the "Better Operating System Software" (BOSS) and it knows how to get rid

I'm repackaging my uBITX to incorporate a Nextion 3.5 display.? I was attempting to flash the display with the v3 firmware and it errored out with the error message incompatible model.? I'm hoping

I tend to agree with Jerry.? Most of the time I encountered undervoltage issues, the symptoms were pretty obvious and easily fixed.? The biggest thing I found was increased current draw as the

Hmm, The heatsink on the regulator on the display board isn't touching any of those solder points is it? 73.

Hi, i have a uBitx v6 that i put together 4 months ago. Radio was working fine the last time i used it 4 months ago. Then i got the radio shipped to another location. Now when i switch on the radio,

I haven't been following the forum too closely, but we seem to have hundreds of Nextion displays on uBitx's, and zero incidents of Nextion displays getting blown by a low supply voltage. So to all

Jerry Yes. On-line ham radio information is full of myths, conjecture, and some outright lies. I suspect that you are correct about this being lawyer instigated CYA (Cover-Your_A$$). Of course the

https://mailchi.mp/mpja/mpja-email-specials-05-06-21

Brown out protection sounds to me like a comparator to hold the device in reset if the voltage is too low.? This would, for example, prevent writes to non-volatile memory at low supply voltages. With

See here (22) uBITX V6 proto testing - YouTube ( https://www.youtube.com/watch?v=UHj6_ta_43k ) Don’t go to phase four right away. You will see the result is pretty cdt

Most modern ICs incorporate "brown out protection". Some older design chips may not. LSI (Large Scale Integration) devices may be more susceptible to low voltage damage unless they incorporate

I had a Lorenz LO-15 and really miss the sound. :-) bill

*** Yes, indeed. I had forgotten, it was a long time ago. Around 1970. I had a railroad surplus model 15. Which had no case. To say it was loud would be an understatement. - Jerry

The failure mode on your RTTY terminal is similar to that of applying a signal in the threshold region to a logic gate: Typically an issue only on really high power parts, careful design can usually

One small nit... BAUDOT does not have upper and lower case. Uperr only. The shift weas for non-alpha characters. bill