OSH Park
Shared projects
Dipole Antenna Board - REV1
by
nayr.
2
layer board of
1.78x0.41
inches
(45.21x10.44
mm).
Shared on
November 20th, 2014 05:34.
Offset Attenuator v1.0
by
SmittyHalibut.
2
layer board of
2.58x0.97
inches
(65.41x24.66
mm).
Shared on
November 20th, 2014 05:07.
A 4MHz offset attenuator for radio direction finding.
Mostly based off this design with a few modifications:
- 3 position switch: Off, On (10db pad bypassed), and On with 10db pad.
- Better filtering LPF from 4MHz oscilator to mixer section, an LC instead of RC (replaced 100ohm resistor with 15uH inductor.) Should leak less RF.
The board is designed to fit into a ½" conduit pass-through box, like what you might put on the handle end of a measuring tape yagi (Google it; there are MANY plans and designs for them.)
Only parts that are “special” are:
The rest are just standard cheap-o resistors, capacitors and 1N4148 diodes, with values as labeled on the board.
Easiest way to get a hold of me is probably on Twitter: @SmittyHalibut. Shoot me a note with your experiences if you use this board! Thanks!
sensor test board
by
S.T..
2
layer board of
2.59x2.59
inches
(65.74x65.74
mm).
Shared on
November 20th, 2014 04:02.
we all know the quality of chinese sensors, so I’ve made this board to test multiple sensors MQ series etc.
Air Quality Board 1.0
by
chipmc.
2
layer board of
2.38x1.11
inches
(60.40x28.14
mm).
Shared on
November 19th, 2014 22:29.
Measures Pollutants - Untested http://triembed.org/blog/?page_id=736
RFM69 Breakout
by
jgibbs.
2
layer board of
0.91x1.01
inches
(23.14x25.68
mm).
Shared on
November 19th, 2014 20:25.