I tried my new circuit with the optocouplers using 270k for R5 & R6 and 1k
for R3 & R4.
It works within the limits of +0v and about -22v. It is interesting that
the other circuit did not work for low + bias. It must be the slower
positive edge as someone mentioned. I will use about +30 and -30v, wh
Hi
You do find them occasionally but normally attached to a CRT already.
I've made PDA connectors using springy phosphor bronze and 3D printed
cups using a flexible plastic like Ninjaflex. With care you can produce
a convincing looking connector.
Grahame
On 17/02/2021 19:55, Toby Thain wrot
No hard figures - it's dependent on a bunch of factors; principally
manufacturing quality, how you use the tube, operating temperature and gas
fill. If you keep the operating current within spec and preferably at the
lower end, avoid the tube getting heated from its surroundings and above
all e
You piqued my interest as to how the FT230X managed this point... From a
quick read of the datasheet, it looks like that by default the chip tells
the USB bus that it's in a bus-powered device that only needs 90mA. The
datasheet is short of detail, but the implication is that you can change
thi
On 2021-02-17 2:44 p.m., Toby Thain wrote:
> On 2021-02-16 3:32 p.m., Dekatron42 wrote:
>> I've had similar problems with two Russian CRT's and I had to use
>
> Most importantly, did you get the CRT working? If so, I could probably
> learn from your project!
Further to that, does anyone know of a
On 2021-02-16 3:32 p.m., Dekatron42 wrote:
> I've had similar problems with two Russian CRT's and I had to use
Most importantly, did you get the CRT working? If so, I could probably
learn from your project!
--Toby
> scalpel to cut them loose and then carefully peel them off as they had
> almost
> On Feb 16, 2021, at 2:18 PM, Toby Thain wrote:
>
> I have a crt with what looks to be a protective plastic sleeve over the
> socket and gun end (pictured: https://imgur.com/9exmkCq). It isn't coming off
> with gentle pressure, are there any tricks other than careful destructive
> removal?
Any updates?
On Monday, December 21, 2020 at 4:36:57 AM UTC-5 wayneco wrote:
> I’m down for two, more if it can be a generic data receiver and display, I
> have been wanting something like that, Burroughs nixie based for a long,
> long time.
>
> Sent from my iPad
>
> On Dec 17, 2020, at 08:24,
Nice clock!
In my circuit, the USB data lines are not connected to the MCU. Actually, I
expect that the negotiation will be done by the FT230X (USB to basic UART
IC), maybe I’m wrong.
When plugged in, the device should only consume a few mA, I will delay
powering on the nixies. For the HV, I us
