Random projects II

Between old projects getting finished, a lot more left behind, even more get in the horizon...

...I finished (for now) the AD8307 power meter:

 


 it was rewired in the inside and placed the input signal on the front. With the switch on this position it indicates the internal battery voltage, 9V, still good.

I also placed a rear input for the companion DVM:



There's also the option of using the front panel plug (on the DVM):



Get back to the midle picture... notice the DC motor and the IR slot sensor, had this recovered from a cassete player and a scanner and will proably be used in a NBTV mechanical receiver project I stunbled upon this week...


And when you don't have plugs for 9V bateries, just grab a used one and recover the top, easy:



Not all 9V batteries are equal but you can recover the plug from all of them.

Here's an idea for a measuring grab plug



It works but I have to get a stronger clip...

Some time ago I decided I would only buy new components when stock is empty or can't be recovered from old boards, truth is: I can't remember last time I bought components....hum...it was 2 days ago: 1N5711 diodes, had none and found none in the pile of old rf boards. It takes some time searching and recovering but no money is spent and you can always say: it was junk before, now it's a transceiver :)

Have a nice week!