In this thread, I have built an oscilliscope

wagdog

wagdog

Ack
Ordered it on eBay, $25 delivered. Took two or three days to get here. The build was pretty much stuff and solder. Instructions were surprisingly good. 200KHz scope, down to 5mV max of 50v input. Is it as good as a $400 scope? No. But for what it is, it's surprisingly good. I've got a signal generator on the way, and then I've got a Russian Big Muff pedal to fix.

It works well, I'm psyched. I still have my tek 465 and probes... I'll just use the probes and this scope. Here's a bunch of pics, and a video of it hooked to an arduino/LED at 50% duty cycle (PWM).

If you get one of these, I highly suggest the 15001k kit - the other kit requires you to solder SMD parts - I've soldered SMD before, it's not fun. The user manual is here: http://www.jyetech.com/Products/LcdScope/UserManual_Shell_new.pdf



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Steverino said:
That is super cool. So what can you do with it, and what are its limitations?
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It'll measure up to 200Khz, which is fine for debugging pedals or any audio gear for that matter. It has a 50v input max, goes down to 5mv, trigger hold, can show vmax/vmin, average, vpp, vrms, freq... it's pretty darn useful! It runs on 9v and can easily fit in your pocket.
 
Steverino said:
Same here, I don't drag it out often, but when I need it, it's there. I may have to take a look at that kit, it would do 90% of what I'd need here in the shop.
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The 465 isn't so big that's it's unwieldy, but it's big enough and heavy enough that it pretty much never gets dragged out. I should probably sell the thing, but I can't imagine it's worth much. As you said, that little scope will do most, if all of what I need at this point. I'm not building any more ham gear, but if I do in the future, I can just buy a newer, better scope.
 
dodgechargerfan said:
Very cool!
I could make use of something like that. Even better, it’s a kit that I hate to build!
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Didn't I see you mention somewhere that you make pedals?

A sig generator and this would make short work of debugging one.

Someone gave me a broken Russian big muff pedal. The usual suspects didn't pan out (jacks/switch/easily seen bad solder join) and I just haven't had the desire to drag out the big scope. Now I have a handy little scope to use.
 
wagdog said:
Didn't I see you mention somewhere that you make pedals?

A sig generator and this would make short work of debugging one.

Someone gave me a broken Russian big muff pedal. The usual suspects didn't pan out (jacks/switch/easily seen bad solder join) and I just haven't had the desire to drag out the big scope. Now I have a handy little scope to use.
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I do.

I haven’t had the need for a scope yet.
Yet.

I got lucky with the few modulation builds that I’ve done where they recommend using a scope to tweak and tune.
I’ll bet if I go back to them with a scope I can get them properly fine tuned.

I regret selling off my big scope years ago, but honestly it would stay under the stairs for years and I’d avoid lugging it out even when I really needed it.

I looked into the scopes that you hook up to the computer, but didn’t get a good vibe from reviews and descriptions.
 
wagdog said:
The 465 isn't so big that's it's unwieldy, but it's big enough and heavy enough that it pretty much never gets dragged out. I should probably sell the thing, but I can't imagine it's worth much. As you said, that little scope will do most, if all of what I need at this point. I'm not building any more ham gear, but if I do in the future, I can just buy a newer, better scope.
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Wish I had a bigger shop. I can get the Tek roll-around cart made for the 465, if I had the room.
 
Interesting. Does it come with a p/s?

I might just have to get that. I have been thinking about building some pedals that winter when it's too nasty to go out and do stuff.
 
335clone said:
Interesting. Does it come with a p/s?

I might just have to get that. I have been thinking about building some pedals that winter when it's too nasty to go out and do stuff.
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No. It needs a 9v ps, 200ma I believe. Positive tip, btw. I have a one-spot with a reverse adapter, so I just used that.
 
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