OSH Park
Profile for Heisenbug
Shared projects
LM2595-/LM2575-Adj switching PSU
by
Heisenbug.
2
layer board of
2.08x1.18
inches
(52.71x29.85
mm).
Shared on
May 5th, 2015 21:58.
$12.15/set of 3 (untested/will update)
Adjustable switcher (buck mode) @150kHz - all hand-solderable, durable ground plane construction. Uses an ATX-4pin plug for handy [12v optional] power in & no need to rewire the cable!
Many choices for parts. I bought the LM2595 ICs on a whim; I’ll roll a few and see how it goes.
4x BTN7960/BTN8962 v1b dual H-bridge
by
Heisenbug.
2
layer board of
4.61x2.20
inches
(117.14x55.88
mm).
Shared on
May 2nd, 2015 22:16.
Untested/Revised; caps moved closer to ICs. Same size, same schematic.
Bill of Materials
| Qty | Value | Name (if not generic) |
-----------------------------------------
| 4 | 2K4ohm | (1/4W 5% ok) |
| 8 | 1Kohm | (1/4W 5% ok) |
| 4 | 10Kohm | (1/4W 5% ok) |
| 4 | 10uF | (35V Electrolytic ok) |
| 4 | 220+uF | (50V Electrolytic ok) |
| 1 | Header | 20/26pin shrouded Square
| 4 | 1N5408 | (3+Amp Rectifier 40+V ok)
| 4 | BTN7960| (Obsolete, BTN8962 ok) |
| 4 | Header | (5-pin/shrouded, keyed good)
| 1 | Solderable Terminal Strip 6pos/0.3" Rated 10+Amp
LED flashlight "cheapies" add-on R-board v2
by
Heisenbug.
2
layer board of
1.80x0.90
inches
(45.72x22.89
mm).
Shared on
May 2nd, 2015 20:19.
Fixed?
A re-work of the original design for a flashlight mod. Larger diameter and hopefully-improved method for making it a break-apart design. See above link for details and the backstory.
$8.10 / set of 3 | untested, but little or nothing to go wrong except mainly in assembly.
USB FTDI 2-part v3 IC-module only
by
Heisenbug.
2
layer board of
1.14x0.69
inches
(28.83x17.50
mm).
Shared on
May 2nd, 2015 19:17.
A replacement FT232RL carrier board for my 2-part USB FTDI modular adapter.
Untested | will update | identical layout to the linked full-board design (taken directly from the small region), $3.90 / 3 copies
4x BTN7960/BTN8962 driver (dual H-bridge)
by
Heisenbug.
2
layer board of
4.61x2.20
inches
(117.14x55.88
mm).
Shared on
April 23rd, 2015 21:27.
$50.70 for 3 / untested, will update
Motor driver for big robotics; a slightly-improved clone of a Chinese design. Main difference: added option for 20/26 pin header for easier connection. ~40A, 36V max. recommended.
Probably insufficient heatsinking, but that’s what fits the dimensions I have to work with.
Due to large un-tented vias under each IC, this board may prove to be fully hand-solderable (and even hand-reworkable using only a soldering pencil of sufficient wattage, a solder-sucker, and a dental pick/needle.)
More revisions and improvements likely to come. Common system ground; does not use the +5v line input (yet).