Alauda Projects

Beacon with SiLabs module

By AP, 

            
This is a beacon project started by my friend YO5VAE. He faced some issues while programming of the Si4463-based module and I thought I might give a hand. I resoldered the entire project on an empty Arduino shield to allow expansion of the project with some additional modules. Below are some pics, but probably the best to get familirized with this project is to watch the YouTube video at the bottom of the post.


		
		



                


    





    
    

                        

                    

                        

                            
Abandoned Posts
By AP,  
Over the past seven years (the age of this blog) I started writing several articles that I never  finished. It’s time to trash them completely or just add them to a list for future afterthoughts. Who knows ? So, from older to newer: “Weller WD 1000 M Review – Part III – Software”, January 18, 2013 — […]


                            

                                
                                                                    
                            

                        

                    

                

                        

                    

                        

                            
Repair of a cassette deck
By AP,  
I twenty dollars for this superb cassette deck. The playback and recording heads were in excellent shape and I used this deck for some years, playing and recording on NOS (new old stock) tapes, mostly chrome type II and metal – type IV, that I purchased on eBay. However, one day the entire head block […]


                            

                                
                                                                    
                            

                        

                    

                

            







			
		
Comments are closed.


	

			

			

				
            
Related posts

                    

                

                    

                        
Ferrite beads
By AP,  
                        

                            DIY | eBay                        

                        
I ordered some ferrite beads for a RF circulator project I currently work on but these might also be very handy for the SWR bridge project. These are extremely efficient for RF supression, or at least this is what they say.

                        

                            
                                                            
                        

                    

                

                

                

                    

                        
Boards for prototypes
By AP,  
                        

                            DIY                        

                        
For low frequency projects, a fast way to prototype is using a bare PCB and scratch some dividers that allow “manhattan” style prototyping. I am especially very fond of this prototyping technique and I believe that PCB design should be avoided in the early stages of prototyping. Jim Williams was an artist in such designs. […]

                        

                            
                                                            
                        

                    

                

                

                

                    

                        
Electronics from China — Pixie CW
By AP,  
                        

                            DIY | electronic parts                        

                        
Power supply: DC 9v – 12v Antenna: 50 ohms, is not balanced, 7MHZ band, standing wave ratio below 1.8 Receive the static current: 10 mA @ 9 v Transmission power: 0.8W @ 9 v, 1.2W @ 12 v Frequency range: 7.023 MHz launch, receive 7.023-7.026 MHz (7.023 MHz crystals) Stray (harmonic) inhibition: – 20 db […]

                        

                            
                                                            
                        

                    

                

                

                

                    

                        
Electronics from China
By AP,  
                        

                            DIY | electronic parts                        

                        
I am pretty pleased by the outcome of my commercial endeavours on eBay. Purchasing seems to be a pleasure; until now — with just one exception — I was spared from any nasty experiences. After several small items that I ordered in part for my curiosity to evaluate speed and quality of shipments from chinese suppliers, I […]

                        

                            
                                                            
                        

                    

                

                

                

                    

                        
144.8 Mhz TX for APRS
By AP,  
                        

                            144.8 | APRS | beacon | DSOX 2002A | FFT | LTSpice | LTSpice IV | Mask Limit Testing | quartz | SPICE                        

                        
Been busy at work lately, but still had some time for myself. Latest idea: a low-cost APRS beacon, done with a classical 144.8 Mhz TX and a μController. AX.25 on air. Automatically. So these days I’ve been busy making this: Winding coils, soldering, measuring. Fun. The frequency is remarkable stable, given the rudimentary nature of this. For example, […]

                        

                            
                                144.8 Mhz for my APRS Beacon project                            
                        

                    

                

                

                

                    

                        
DIY Fridge Magnets
By AP,  
                        

                            DIY | fun | magnets                        

                        
I love fridge magnets. We love fridge magnets (my wife likes them too). This is how our fridge looks like: But we also love beer. And we have a large collection of beer bottle caps and coasters. So I thought to combine these and make the caps stick to the refrigerator. Now, what you need […]

                        

                            
                                                            
                        

                    

                

                

                

                    

                        
Logic Analyzer!
By AP,  
                        

                            DIY | Logic Analyzer | Objective-C                        

                        
…and not only software (maybe). OK, to keep things short, I got tired by limitations of my Saleae logic analyzer, especially on the software side so I decided to build one. This is my new project: a DIY logic analyzer that I will hopefully use to better extent in my other projects. First results promising. […]