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I have a R-PI3+ built up as laptop and running Raspbian on a 64GB uSD. I call it my steampunk craptop (laptop based on Pi and battery powered). Its been fairly easy to take most anything that runs

Thanks Vojtech for pointing out KD1JV design but the idea I have in mind is to recover parts or modules of old cellphones to be reporposed for ham cw encode and decode. Today I dont know enough of

I handle a lot of metal over the years and a few tricks. Improvised brake, two pieces of steel angle iron and the material to be cut between them and score along the edge with a really sharp

Hi guys, New to the group. You can use a carbide tipped Formica scoring tool you will never wear it out, just use a straight edge and pull it to you (clamp straight edge to part and table) 73

In winter 2015 I bent my old code from 2010 to a "value line" MSP430 processor that comes with the MSP430 launch pad

Hi Juanjo, Thanks for your interest. The project will be published completely on github. The firmware is just a working sketch as of now, and there is no printed board. I am in the process of

No route to host 73! Mark KA6WKE Website: https://www.ka6wke.net

The really expensive machine!! Monty Python's Meaning of Life reference.....

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A lot of resources are wasted on tons of out of fashion? but still good cell phones!!? Why not rescue the text mode together with the key board and the lcd display for use as CW keyer

Hi Vojtek, Would love to see the full document write up for the project. My guess is you are using a resistive absortion bridge for direct/reverse wave sampling and then a small microcontroller but I

I have a prototype working, see the attached photos showing the infinite SWR with open antenna terminals by lighting up the last LED, and showing a SWR roughly 1:1.1 with a 50 Ohm load. The bridge is

Unless you expect your antenna impedance to change radically while you are transmitting, there is no need to continue monitoring your SWR once you have properly adjusted your antenna tuner.? There is

Here is another version of an AD9833 signal generator. There are several other variations availablr. http://www.vwlowen.co.uk/arduino/AD9833-waveform-generator/AD9833-waveform-generator.htm DuWayne

There are two reasons to try it: First, it is challenge therefore fun. Second, it shall be an external box and it is great to not to worry about flat batteries. 1 mA flowing through a clear high

I get emails from instructables.com for all kinds of projects. Some of them are electronics and today I got one on building a signal generator. https://tinyurl.com/y538tos4 I leave it for someone in

If your running a micro 1.5ma seems very low and LEDs you can see in daylight want a few ma to themselves. Also don't forget the transformer and rectifier is a load ont he transmitter and that is

The suggested SWR meter shall draw roughly 1.5mA using a 1:2 or 1:3 transformer from the transceiver. Using a 1:2 transformer, with the assumption that only the positive polarity peak will be

I pondered the idea an using a QRP radio or even a 20W radio where some larger chunk of power out goes to SWR/power meter tp power it seems wrong. Even if the suggested electronics uses a watt on a