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http://www.vwlowen.co.uk/arduino/AD9833-waveform-generator/AD9833-waveform-generator.htm Arv _._

I have two? One with a grid (really, a 6c4) and the other a fet. Handy thing they are.? I've even copied W1AW with one! Allison

DuWYne kv4qb Very impresive.? That fits with what this group was envisioned being....Amateur designed and built test equipment that is equal to or better than available lab-grade equivalent

I use the Adafruit ADS1x15 library?https://github.com/adafruit/Adafruit_ADS1X15? .? It works for either the 12 or 16 bit version of the chip. There are examples for the differential or single ended

Jim Looks like I missed that in the posted version.? Thanks for catching it. I am away from home today but will make correction when i get back.?? Arv_-_ Sent from my Verizon, Samsung Galaxy

With a few minor code changes I have this meter running. Have not completed testing yet but your right. Sensitivity and resolution could be better.? DuWayne... could you share your code?

For differential voltage measurements I have been using an add on ADS1115 I2C 16bit ADC module.? Can be programmed for either 4 single ended or 2 differential inputs.? Higher resolution and? input

Thanks. I guess the best way will be to build and test. More fun that way anyway.? Also just a note for you and those that might build this. ?Found a small error in the code. ? In reading ADC a.

Jim WA7HRG Two ways to determine the input resistance of any measuring device. 1. Add series resistance to the input until measured voltage reads half what it did without the resistance. This external

Arv interesting project. Do you know or can you tell me how to find out the input resistance of such a meter? ?I don’t seem to find it on the Arduino spec sheet.? When building an RF probe the

Allison Agreed about noise from all sort of electronics. We live in a world full of it, some of our own making. I broke open the USB charger module (1) to see what was in it, and (2) so others would

Hey Arv, Handy, you bet! Been using those for something north of 40 years.? Back then it was to make digital computers using Z80 and friends without resorting to back planes (large or costly) to

Arv, as an actve ham on MW, HF and VHF? II can say those things and may other not USB are Banned in teh hose till verified RF non interfering.? Can't control the neighbors but I try to not do it to

Building small test equipment modules usually involves some sort of power system. Batteries are a good start but for equipment that is only used on the workbench it seems that an AC supply is a better

Cool Stuff Arv. I was thinking more about PCBs and perhaps a concept that can become more functional, than the Arduino boards with their funky connectivity being limited to a single mezzanine add on

https://www.qsl.net/va3iul/Homebrew_RF_Circuit_Design_Ideas/Return_Loss_Bridge.gif https://www.qsl.net/va3iul/Homebrew_RF_Circuit_Design_Ideas/Return_Loss_bridge_AD8307.gif <goog_1562409253>

Ron N7FTZ A stack of those cheapest of cheap prototype boards is a perfect fit for standard size mains outlet boxes, the kind that sell at US DIY Hardware stores (Lowes, or Home Depot) for US$0.49

This type of interconnect makes a lot of sense. I used it many times in the past with industrial products and the products were very stable both mechanically and electrically. Modular design has many

Bi-sexual connector blocks, inexpensive from Ebay vendors. [image: image.png] Connectors on each end of cheap prototyping boards from Ebay vendors. [image: image.png] I took the suggestion of John

contact me at?fernandocasari@...? My english is very limited to follow a tread here best to all? Fernando