I appear to be having the same problem with my Antuino.
It won't power up with the battery pack. I reflowed the solder
joints. The diode appears to be operating like a Capacitor, ie -
it conducts power for a short period of time, then stops
conducting power.
What are the power specs for the external power input? Does the
Antuino charge NiMh batteries when connected to external power? I
looked on the schematic, and it does not appear to say, either.
Thank you,
Chris Shaker
KJ7BLE
On 8/23/2019 6:42 AM, Jim Sheldon
wrote:
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Ashhar and all,
I found the problem and fixed it. ?It was not completely bad
soldering on the DC connector, it was also the 1N4148 diode in
series with the incoming 9 volts being OPEN. ?After re-flowing
all the solder joints from the component side and checking
continuity, I still got nothing from the 9V connectors + side to
the side terminal on the main DC connector. ?I checked
continuity from the cathode of the diode to that point and it
was good so I checked the diode -- no forward conductivity at
all. ?I have a well stocked parts bin, replaced the diode and
now everything works as it should. ?
Anyone having this problem that re-flowing solder on the DC
connector doesn't fix, be sure to check the diode as well.
?1N4148's are pretty rugged but I've received bad ones even from
Digi-Key and Mouser in the anti-static strips they come in and
it's not all that uncommon.
Jim - W0EB
Oh yes, how about a written manual in PDF format rather than
video? ?Some of us would much rather read the book rather that
watch you-tube videos. ?Especially when needing info and the
internet is not available!
Jim
------ Original Message ------
Sent: 8/22/2019 9:22:14 PM
Subject: Re: [BITX20] Antuino manual
Jim,
The SMD parts are assembled on a Panasonic
pick and place. No chance of a reversed diode. What is,
however, possible is that the DC connector, which is hand
soldered, hasnt been soldered properly. Open up the box,
unscrew the PCB and flow solder on the tabs of the DC
connector from the component side. I covered this problem
a while ago.?
A video manual is in the works. I finished a
few yesterday, I will start posting th3 videos over the
weekend.
73, f
On Fri 23 Aug, 2019, 6:17
AM Jim Sheldon, <
w0eb@...> wrote:
That would be nice.? Mine works fine on the
external power input but 6 brand new AA cells in the
battery box (9.56V) wont even light it up.? I did
check and have the 9+ volts on the PCB terminals but
without a manual and current schematic I don't want to
take it apart.? Not really a happy camper right now.?
Farhan take note I suspect an open ?or reversed diode
but without a schematic I can trust, I don't want to
destroy it accidentally.
Jim, W0EB?
?
This may not be going to the right group.
Is there a manual available for the Antuino? My unit
arrived today.
I thought I joined the Antuino group but I see the
last posting I received was on 8/17.
John Norris
KI4UCN
Chris Shaker, KJ7BLE