Good Morning all,
Thanks to all who have ordered any of the 12v 5AH batteries. There
are lots left if you want ... 8-)
I promised a description and price on the PCB and parts kit - here it
is.
The Mike Bryce charger board has a bridge and filter capacitors so you
can feed it either AC directly from a transformer or DC, an LM317
regulator, diode switching (batt or ac to load), two LED indicators,
and a terminal strip for power I/O. Its still a pcb though, without
a case. It can handle an amp to a load and charge the battery
concurrently, the diode switch the batt to the load when AC/DC power
is lost.
The PCB is $12 from me or from Mike Bryce, the boards will be ready to
ship in a couple weeks. Parts kits, including the pc mount TO220
heatsink, schottky diodes, and terminal strip is $11. Small Flat
Rate Box is 4.95, so total would be $28.00 ea
I'll include a copy of the QST article, some recommendations for 2~3A
16v AC wall warts (AllElectronics, Marlin P Jones, etc) if you like.
For the gang charger on this project I've just cranked up the Alinco
supply to 15.5 and with the schottky diodes I can still limit/charge
at 13.5 out of the regulator. But for long term use, I'll be using
an AC input for better regulator head room.
Summary
PCB only $12 + 4.90 $ 16.90
PCB+Parts+shipping $ 28.00
PS if you ordered 2 or more your only paying one shipping cost !
Address in QRZ is good, checks (pretty much anything...) ok
PayPal is nice nskousen (at) ecsecurityinc (dot) com
Thanks all
Niel
WA7SSA
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