Re: [beam] Looking for an oscilloscope
- If you are not too worried about a high upper end for the bandwidth
(100 KHz or less), and already have a Gameboy laying around, you might
try this one. I've bought about $30-40 in parts, plus, $14 for the
EPROM chip, $8 for the PC Board, and $8 for a PC software disk that
includes a program for capturing screenshots or data.
For the size and the price, it's not too painful to build, so long as
you only need 100 KHz Bandwidth. Another benefit is if you have a
Gameboy Pocket, the thing is extraordinarily small, and 100% portable!
I'm talking pants pocket, maybe even shirt pocket small. As for the
cables, they suggest chopping the ends off of a pair of good cables and
installing stereo earphone style connectors. I just bought a rumble
pack equipped Gameboy game cartridge and modified it to fit the
cartridge. You'll have to glue it shut, since the screw posts are in
different places for those and must be filed, but the battery
compartment cover acts as a great port to access the calibration pots!
The added space on the end of the rumble cartridge allows me to just
install pain old BNC connectors on the cartridge. I'll post pictures
when I get the last three parts and finish...
That and probes... Geez are those expensive, and ya just need 'em no
mater what kinda scope to get, be it PC, portable, Gameboy, or regular.
I have a pair of probes, but they have had troubles. Probably a broken
wire in the coax cable. at least it looks good with them attached. I
really don't have to worry about probes till I finish.
Oh, and if you're opposed to building it, then you can buy them
Begin forwarded message:
> From: Mark Hillier <Mark@...>
> Date: Fri Sep 5, 2003 11:33:54 AM US/Central
> To: email@example.com
> Subject: Re: [beam] Re: Looking for an oscilloscope
> Reply-To: firstname.lastname@example.org
>>>> Hi folks. My next (hopefully finishable) project would go a lot
>>>> easier if I had a dual-trace scope. I need to compare input and
>>>> output signal waveforms. My DMM has a scope built in but it's a
>>>> little hard to work with, and it's a bit limited as a scope, and
>>>> has one channel. In short, does anyone have a dual trace scope
>>>> be willing to sell/ are selling? Preferably cheap (or less ;)
> Have a look at this:
> It's a PC-based scope that you connect via USB (no poser supply
> needed). Runs under windows, has all the storage and capture
> features of an expensive device.
> It has a bandwidth of about 200 KHz....