Si5351a Synthesiser


So tonight i bout together one of 3 QRP Labs Si 5351a kits that I bought, not for WSPR use, but for future CW or SSB transmitter projects. The synth IC itself is awesome, 3 individually programmable square wave outputs. The kit went together ok, a couple od minor annoyances. The footprints used for the 2 transistors were wrong for the parts being used, and the spacings were kind of wring, there is so much more room on the board that it could have been spaced out better so the resistors did not sit under the cap of the transistors, and the SMA pads were about 1mm too short and required fiddling and spacing off the board before soldering,  anyway, thats about all i can bitch about HIHI.


Parts laied out for install, 3 SMA connectors are not included in the kit.


Resistors installed.


Caps and voltage regulator installed.


Transistors installed.


Final product with headers and SMA connectors installed. Next i will make a board to mount this on, supply power to the 4 different 5v pins???? not sure if it needs 4 different voltage lines, but according to the pinout it does, will need to look into this more. Next job will be to code up some Arduino code to test it and then turn it into a VFO.


12v 0.5A Solar Panel

Its been a while since i have updated this space. I have been waiting on parts and kind of lost interest with my home brew endeavours for a bit, but i still find some time to tinker. I finally got the rest of the solar panels I had on order and have wired them up, 2 panels paralleled 4 pairs in series. Theoretically we should have 12v 8watts or 0.6amps.


So I got some sun today, being winter and 4pm in the late afternoon, to see 300ma peaking on a panel that should max out at 0.6amps is quite nice. With some sun intensity we should see close to the max being made, and certainly over 0.5 of an amp.


Unloaded voltage is about 13.8v, so everything is looking nice, now i just have to mount it all up on some plastic sheet i have, add some plugs to the wire, series diodes so the battery does not flow back into the panel and finally a volt meter and ammeter as I will be the charge controller and over volt protection for the AGM deep cycle,