The Shop > Electronics & IC Programing
Digital oscilloscope project/kit
RobWilson:
--- Quote from: John Swift on January 05, 2016, 03:36:49 PM ---Hi Rob
a simple LED oscilloscope from 20 years ago
the circuit shows the principle
the 'scope in the photo has an adjustable sync , time base and attenuator
as expected in a usable tool
the oscilloscope is usable up to 30 KHz
John
--- End quote ---
Hi John , Did you build one ?
Looks a fun project , I may have a bash at making one myself :zap:
Its good to see this old time technologie , all way way before my time :lol: :lol: cheers for sharing lads :thumbup:
Rob
wheeltapper:
Hi Rob.
I've just finished building the scope kit and it all seems to work OK apart from one thing, the top l/h switch for AC, DC and ground, I can only get the display to indicate DC or ground.
have you any ideas what to look for?
cheers
Roy.
kayzed1:
My kit arrived today, will take a look at it in the morning and report back.
Lyn.
John Rudd:
How long does it take for a kit to arrive?
Might just buy one for fun... :coffee: I already have a digital lcd scope...... :scratch:
RobWilson:
--- Quote from: wheeltapper on January 06, 2016, 03:27:03 PM ---Hi Rob.
I've just finished building the scope kit and it all seems to work OK apart from one thing, the top l/h switch for AC, DC and ground, I can only get the display to indicate DC or ground.
have you any ideas what to look for?
cheers
Roy.
--- End quote ---
Hi Roy
All I can think of is you may have a faulty switch ,
From pin 2 on the back of the board to the outer of the BNC plug ,
With the switch in the Ground position you should have continuity .
In AC or DC there will be a high resistance , if you still have continuity in these positions the switch is bust.
DSO Manual attached for the pros to cast an eye over .
Hope that helps ,Rob
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