Following Steve Wiseman's generous offer I now have some SMD diodes and h
ave modified my dismantled monitor.
I haven't got a T'bolt running at the moment but the modified monitor boots
up ok and then flashes "No Message" as I would expect.
After adding all three series diodes I measured 5.0
In a message dated 05/06/2010 16:18:06 GMT Daylight Time,
dan...@verizon.net writes:
> 3...The series input and base to ground resistors on the RS232 interface
> are both 180 ohms, rather than 10K and 3K3 respectively as in Didier's
> circuit.
>
>
If one wanted to use the RS232 int
gandal...@aol.com wrote:
3...The series input and base to ground resistors on the RS232 interface
are both 180 ohms, rather than 10K and 3K3 respectively as in Didier's
circuit.
If one wanted to use the RS232 interface to a computer at the same time
as the ko4bb monitor in parallel, wh
Further to earlier comments I have now traced the full schematic of the
8051 replacement processor board in the iCruze display.
The schematic is so close to Didier's original that I don't think it's
necessary to provide a copy but could do so if required.
Differences are described below and
In a message dated 04/06/2010 16:53:36 GMT Daylight Time,
bro...@pacific.net writes:
I've added a photo of the component side of the 8051 PCB at:
http://www.prc68.com/I/ThunderBolt.shtml#8051PCB
J1-2 is connected directly to pin 6 of the uC which is also connected to
the output of the 78
Hi:
I've added a photo of the component side of the 8051 PCB at:
http://www.prc68.com/I/ThunderBolt.shtml#8051PCB
J1-2 is connected directly to pin 6 of the uC which is also connected to
the output of the 78D05 regulator.
Have Fun,
Brooke Clarke
http://www.PRC68.com
gandal...@aol.com wrote
Does anyone have a picture of the Board showing where these diodes go ?
Thanks, Dick, W1KSZ
-Original Message-
>From: gandal...@aol.com
>Sent: Jun 4, 2010 7:14 AM
>To: time-nuts@febo.com
>Subject: [time-nuts] Fluke Thunderbolt Monitor Revisited
>
>Hi All
>
>As
Hi All
As there still seemed to be unanswered questions regarding the circuitry of
these I've separated the two PCBs from one of mine to determine exactly
what is going on.
Whether or not the regulator circuit is based in any way on the iCruze
original processor board I don't know but it'
