开云体育

Anyone having an issue with GPIO control for PTT on an RPi4 with FLDIGI 4.1.19?? I see that GPIO 25 is set for an output type but unable to key transmitter.? Same GPIO is working with Direwolf

Have you made any stability measurements? Personally I'll stick with the Si5351, simply because they are easy to obtain, program and use. In any case the cost of shipping exceeds the price of the part

I've tried to output various frequencies from Raspberry Pi Pico, In MicroPython, changed the machine frequency (this automatically programs the PLL), then divided by 2 or more using PIO, to avoid any

An HF skyloop is an incredible receive only antenna in the city. imho. 73 [email protected]> wrote:

If anyone wants to know if their Pi is complaining about low voltage, here is a short script to run and have a look: sudo grep Under-voltage /var/log/syslog | wc -l Output is the number of under

I operate 75 and 40 but that doesn’t really matter because even with my house turned off completely my noise floor is pretty pathetic. At field day every year I marvel at what silence sound like. I

What bands are you operating on. Thanks. 73 [email protected]> wrote:

I’m not sure there is NO noise, but there are 40 of them in use in our data network and I’ve heard no complaints. They are $15 from Amazon https://www.amazon.com/gp/product/B07LCHTVCM and $40

We see linear supplies that waste half the power as heat and smps supplies that raise the noise floor noticeably. Can you detect any noise from the DROK? Their website isn't very technical. Amazon is

The acid test for all this is whether the Raspberry PI complains about under-volt. If the PI doesn’t complain, EVER, you are probably in great shape. Measuring the voltage at the PI makes sense.

This just in. I wonder how much noise it makes. 73 CNX Software: PiSugar S and PiSugar S Pro – Lower cost batteries for Raspberry

I have a Pi running as a dedicated hotspot using Hamvoip. I don't backup the microSD card, only the config files. I've had a few issues that I've created and easily restored from the last config files

Measure the voltage and current at your Pi, don't guess. And FYI, power supplies according to https://www.raspberrypi.org/documentation/hardware/raspberrypi/power/README.md require 5.1

FYI – I’m also testing the same setup at home, using my big 35amp switching supply. The USBBuddy (yes, 5V 3A) is not the problem, that I can confirm. All other variables being the same – 1ft

Had the same issue. Went to Anker USB cables. They use higher gauge power conductors than signal conductors in their cables. Available lots of places, including Amazon. -larry (K8UT)

Consider making the run from the battery as long as you can by repositioning the PowerWerx USB-Buddy close to the Pi. Use decent gauge wire between the battery and the USB-Buddy. Or consider using a

https://www.raspberrypi.org/products/type-c-power-supply/ slightly above 5 Vdc 73

Dave. Certainly 5.5v wont hurt the pi. But he has a voltage drop because his powerworex is only at max of 3a unit with the 3 ft cord.? Also what I would do if it were me. I would ohm out the 3 ft

I've done some evaluation of R-Pi power supplies and concluded they're basically all crap ;-)?? The white "official" ones still allow undervoltage errors to occur but they do tend to be better

How do you "up your output current" in this situation? Maybe raise the Voltage to get same power on a given conductor? 5.5Vdc won't hurt anything. Beware of smart USB sockets that limit power. 73