LmDown
About the LmDown PCB
LmDown is an open source PCB design by nietamten, published on GitHub. It is a 2-layer board measuring 36.5 × 26.9 mm, with 29 components from 22 distinct parts.
Other key parts include the LM5008MM. By type, the board carries 4 diodes, 1 IC, 1 transistor and 1 inductor.
It belongs with the power & battery designs in this gallery.
From the project
NCP1034 buck with regulated output voltage, output current, minimum input voltage
Kicad project of NCP1034 based buck converter with features useful for solar panels and batteries.
After adjusting compensation network with "Design Spreadsheet for NCP1034" seems to be stable If it's not, see troubleshooting section.
There is separate output anode with current limit. It can be used simultaneously with that not limited. For example battery can be charged with limiting (to not damage it by overcurrent) and some device can use non-limited anode to not distgurb charging. It is not working ideally (limited output can limit that not limited) but can be helpfull.
Main components on the LmDown
LmDown bill of materials (BOM)
29 components, 22 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM5008MM | MSOP-8_3x3mm_P0.65mm | U1 |
| 1 | Q_NPN_BCE | TO-92L_Inline_Wide | Q1 |
| 1 | 3.3nF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | Ca1 |
| 1 | 100nF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | Cb1 |
| 1 | 10nF | C_Disc_D7.5mm_W5.0mm_P5.00mm | Cbut1 |
| 1 | 0.47uF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | Cbyp1 |
| 1 | 47uF | CP_Radial_D10.0mm_P5.00mm | Cin1 |
| 1 | 100nF | C_Rect_L7.2mm_W3.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | Cinx1 |
| 1 | 100uF | CP_Radial_D10.0mm_P5.00mm | Cout1 |
| 3 | TestPoint | TestPoint_Loop_D2.50mm_Drill1.85mm | IN+1, OUT+1, OUT-1 |
| 1 | min 2.2k | Potentiometer_Runtron_RM-065_Vertical | RV1 |
| 5 | 100k | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | Ra1, Ra2, Ron1, Ron2, Ron3 |
| 1 | 2.2k | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | Rfb1 |
| 2 | 10k | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | Rfb21, Rled1 |
| 1 | 1k | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | Rfb22 |
| 1 | 10k | R_2010_5025Metric | Rled2 |
| 1 | 470k | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | Roff1 |
| 1 | D | D_DO-15_P10.16mm_Horizontal | D1 |
| 1 | D_Zener | D_1206_3216Metric | D2 |
| 1 | LED | LED_0805_2012Metric | D3 |
Show 2 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | D | D_A-405_P10.16mm_Horizontal | D4 |
| 1 | 300uH | L_Radial_D10.0mm_P5.00mm_Fastron_07P | L1 |
LmDown design files
The KiCad project lives in the nietamten/VoltageConverterForSolar repository on GitHub; these links point at the commit this page was built from.
LmDown: common questions
How big is the LmDown PCB?
The LmDown measures 36.5 × 26.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the LmDown?
29 components, from 22 distinct parts. The full bill of materials is listed on this page.
Where can I download the LmDown design files?
From the nietamten/VoltageConverterForSolar repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the LmDown design in my own project?
The repository has no license, so all rights stay with nietamten. Use it as a reference, and ask the author before reusing the design.
More boards in VoltageConverterForSolar
Similar boards
EinkPDA screen
TalismanDesign
95 × 54 mm27 parts2LApache-2.02.0k
Stack chan
stack-chan
50 × 50 mm33 parts2LApache-2.01.7k
Display Carrier
AxxAxx
35.6 × 58.2 mm5 parts2LGPL-3.01.7k
ProgrammingAdapter
stuartpittaway
10.5 × 83 mm3 parts2LCC-BY-NC-4.01.1k
TemperaturePCB PANEL
116 × 75.5 mm178 parts2LCC-BY-NC-4.01.1k
Module 16S PassiveBalanceAddOn
61 × 74 mm86 parts2LCC-BY-NC-4.01.1k