LCS-1M - A Low-Cost Hobby Oscilloscope
Fully functional single-channel development version.
For circuit design I can only recommend
breadboarding before building a real board - looks
messy but allows for quick changes and to try out
The final design (V1.1) in its minimum version without
enclosure. Power connection is either a standard
connector, or a screw terminal. Probe connection can
be BNC (e.g. for coaxial grabber cables like in the
picture below) or screw terminals. Note: If you want
to mount the scope into the intended enclosure, do
not assemble the through-hole BNC connectors!
The LSC-1M in an enclosure, coaxial cables with
mini-grabbers as probes, and a wall-wart type
9V/300mA power supply. Also shown is the USB
download cable - needed when the computer does
not have an RS-232 serial port. Otherwise a simple
serial cable works just as well and is much cheaper.
PC based scope GUI, displaying both scope
channels. You can make measurements on the
traces using the cursors (here: amplitude and
frequency - see green cursors in the display and
status bar at the bottom).
Same waveform (CH1, square wave), but now in
real-time frequency display. Great to find resonances
and oscillations and to analyze periodic signals.
The final design, built into an off-the-shelf enclosure.
Added a status LED on the front panel. An enclosure
is a good idea because it protects the circuity to some
extent against electric discharges and also adds
mechanical protection, especially when carried
Classic X-Y display mode - channel 1 provides
horizontal deflection, channel 2 the vertical deflection.
Useful e.g. to check out reactive components.
LCS-1M user Sach Lamb has created a beautiful
enclosure for the instrument (see picture of his
prototype). The front panel is secured with screws
and the PCB pulls out in a drawer type arrangement.
The material is acrylic which has been painted (and
can be painted any color). Colored acrylics are also
Sach plans to make this available as a kit so if you
are interested drop me an email and I'll get you in
touch with him directly.