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Author Topic: analog scope on CRT  (Read 3398 times)

Offline RaffT

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analog scope on CRT
« on: May 30, 2008, 08:11:53 PM »
 guys/gals,

 have a look...



plan ko rin gawin yan... still gathering the required info pa....buti sana if meron mag bigay ng mini 12V operated B/W TV to play with.. hehe


>> but some circuit needs to be added for input , etc etc ....timing, div...

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analog scope on CRT
« on: May 30, 2008, 08:11:53 PM »

Offline RaffT

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Re: analog scope on CRT
« Reply #1 on: June 03, 2008, 03:19:13 PM »

 hi guys/gals,

 been out for awhile(nasira router ko)... but im back...

 some pics pala..



 the signal GEN.....




connections sa likod...



a SQUAREWAVE DAW??? heheheh

ohh...modify nyo nlang :)

bye!



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Re: analog scope on CRT
« Reply #1 on: June 03, 2008, 03:19:13 PM »

Offline 'yus

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Re: analog scope on CRT
« Reply #2 on: June 03, 2008, 03:34:19 PM »
ok din 'to ah..  ;D
na-try mo ng ikabit yung signal sa ibang coil nung crt? para normal yung orientation (horizontal) hindi vertical.. although pwede na rin, yung crt na lang ang itatagilid.. hehe
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Re: analog scope on CRT
« Reply #2 on: June 03, 2008, 03:34:19 PM »

Offline RaffT

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Re: analog scope on CRT
« Reply #3 on: June 03, 2008, 04:01:43 PM »

 di pa.. just a quick experiment ko lang yan...I have seen almost all na ginanito ang hardware, ganito talaga ang orientation nila... seems like there is "something" sa freq in horizontal and vertical scanning...I have a dead PC monitor here, DEAD talaga pero nag bli blink lang yung LED power ind nya.. strong hint horizontal transistor lang sira nito...maybe this is better to play with, compared sa TV?? kasi pwede mo siguro maiba yung scanning freq nya(para stable yung display sa CRT with inputs)...
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Re: analog scope on CRT
« Reply #3 on: June 03, 2008, 04:01:43 PM »

Offline 1110000

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Re: analog scope on CRT
« Reply #4 on: June 03, 2008, 04:13:55 PM »
frequency divider needs mo, tapos phit mo na lang yung coil para maging kaparehas ng orig na scope :D
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Re: analog scope on CRT
« Reply #4 on: June 03, 2008, 04:13:55 PM »

Offline RaffT

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Re: analog scope on CRT
« Reply #5 on: June 05, 2008, 12:28:40 AM »



 not CRT, but LED matrix based...  ;)
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Offline 1110000

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Re: analog scope on CRT
« Reply #6 on: June 05, 2008, 12:40:44 AM »
Sir raft ang ganda ng Signal gen nyo pede makahingi ng scheme? sama nyo narin yung scheme ng meter :D
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Offline 1110000

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Re: analog scope on CRT
« Reply #7 on: June 05, 2008, 04:59:30 PM »
 ::)
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Offline RaffT

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Re: analog scope on CRT
« Reply #8 on: June 06, 2008, 04:51:24 PM »

 teka sir ha..hanapin ko pa sa PC ko.... about the counter, google mo nalang "simple PIC counter" ..its using 16F628 ....
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Offline 1110000

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Re: analog scope on CRT
« Reply #9 on: June 08, 2008, 12:48:01 AM »
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Offline RaffT

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Re: analog scope on CRT
« Reply #10 on: June 08, 2008, 07:45:46 AM »


 galing mo mag googel  ;D..cge hanapin ko pa bookmark sa site ng signal gen gawa ko...
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Offline 1110000

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Re: analog scope on CRT
« Reply #11 on: June 08, 2008, 09:23:10 AM »
ano po ba chip na ginamit sa signal generator nyo? ICL8038? XR2206? wala sa dalawang yan?
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Offline 1110000

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Re: analog scope on CRT
« Reply #12 on: June 08, 2008, 09:30:42 AM »
Back to topic,
may naisip na ako kung paano ang magiging sistema ng circuit, may tanong lang ako kaya bang gawin sa PIC ang frequency divider? ??? tanong lang ::)
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Offline RaffT

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Re: analog scope on CRT
« Reply #13 on: June 08, 2008, 11:51:46 AM »
here is the schematic sa signal gen..I forgot san ko iton na DL...naka save lang kasi...




Quote from: joseph@elab on June 08, 2008, 09:30:42 AM
Back to topic,
may naisip na ako kung paano ang magiging sistema ng circuit, may tanong lang ako kaya bang gawin sa PIC ang frequency divider? ??? tanong lang ::)

are you reffering on using the CRT for scope? :)

sensya di ko kabisado ang PIC programming.... pwede naman cguro...

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Offline 1110000

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Re: analog scope on CRT
« Reply #14 on: June 08, 2008, 11:54:33 AM »
 ;D salamat sa scheme

sino kaya magaling sa programming ::)
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Offline 'yus

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Re: analog scope on CRT
« Reply #15 on: June 08, 2008, 11:16:48 PM »
Quote from: joseph@elab on June 08, 2008, 11:54:33 AM
;D salamat sa scheme

sino kaya magaling sa programming ::)
yung DIY scope ni rafft pwede ng i-modify yung code nya para magawa syang frequency counter..
or ang mas maganda, gawin syang parehong oscilloscope saka freq. counter..
and magpipili ka na lang sa dalawang functions through external switch..
nung kinompile ko yung code para sa F877 wala pang 50% yung memory consumption nya,
kaya possible na possible na magawa ito..  ;D
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Offline 1110000

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Re: analog scope on CRT
« Reply #16 on: June 08, 2008, 11:19:12 PM »
pero mas maganda ata kung sa lcd
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Offline 'yus

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Re: analog scope on CRT
« Reply #17 on: June 08, 2008, 11:20:45 PM »
Quote from: joseph@elab on June 08, 2008, 11:19:12 PM
pero mas maganda ata kung sa lcd
pwedeng i-display yung frequency reading sa LCD..
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Offline Born2BeWired

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Re: analog scope on CRT
« Reply #18 on: June 08, 2008, 11:57:08 PM »
The reason kung bakit ang horizontal coil ang ginagamit nila for the signal is mas mataas ang frequency cutoff ng horizontal coil (which translates to wider bandwidth). The vertical deflection coil is capable of displaying up to a few hundred Hz only. Kung gusto mong orient ang display sa 'tamang' ikot, madali lang- I am not talking of standing your TV on its side. Ikot mo lang ang deflection yoke ;D

Nevertheless, you should be aware of the vertical (signal) limitation of this setup, hanggang audio frequencies lang ang kayang display nito. You can stretch the bandwidth a bit more by driving the coil with high voltage drivers.

Finally, make sure yung brigthness ng TV is nakaset sa tamang brightness lang to prevent burning your CRT face. ;)
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Offline RaffT

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Re: analog scope on CRT
« Reply #19 on: June 09, 2008, 06:09:19 AM »

 tama ka jan  :D

 pero ewan ano if merong "plates" ang mga colored CRT o di kaya monitor CRT?? I think imbes na horiz/vertical coils ng ginagamit pag input for signals, eh dun nalang sa plates...
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Re: analog scope on CRT
« Reply #19 on: June 09, 2008, 06:09:19 AM »
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