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2 layers90.2 × 95.9 mmRADSAT SK Timer, the printed circuit board in 3D

PCB Schematics and Layout for the RADSAT-SK Timer and Inhibits board, currently orbiting earth!

Size
90.2 × 95.9 mm
Copper layers
2
Thickness
1.6 mm
Parts
125
Nets
77
Pads
421
Tracks, vias
581, 58
Pours
3
Routed
Yes
KiCad
KiCad 5 (file 20171130)
Created
26 May 2021
Updated
8 Feb 2023

Overview

RADSAT SK Timer is an open-source printed circuit board by USST-RADSAT-SK, from the USST-RADSAT-SK/power-and-electrical repository on GitHub. It is a 2-layer board of 90.2 × 95.9 mm with 125 parts on 77 nets, routed with 581 tracks and 58 vias.

It is built around the CPC1117N, LM397MF and CD4052BM, with the 5.0SMDJ5.0A and BAT54CDW among its other parts. Its parts include 56 resistors, 18 capacitors, 15 transistors, 9 ICs and 8 connectors.

Main components

5

README

README.md

power-and-electrical

How to Download GitBash

Gitbash is a terminal that you use to execute "git" commands and its highly recommended that you download it

Use the following link https://git-scm.com/downloads

How to Copy a Repo

Make a folder on your local drive (I make a folder on my desktop)

go into that folder and right click and open gitbash at that location

find the green button in the github that says "Code"

click and copy the URL

go back into the gitbash enter

"git clone [URL]"

Now if you want to make changes to a file please make a branch

How To View a Branch

Say you want to do a quick check on the progress for the PCB board

use the following commands in git bash

"git checkout [name of branch]"

In the case that KiCad is not updating automatically use the following procedure:

  • open project file with "open with..." in file directory

If you quickly want to check when the last changes were done to a branch use

"git log"

scroll up & you will see the most recent commit and who did it

How To Make a Branch

a branch is like a copy of files that you can edit on your local drive where you dont have to worry about messing up the main code

make sure you are in the right directory

"git branch [name of the branch]"

keep the name of the branch short and sweet no need to make it complitcated

How to Commit a Change

Once gitbash is opened you want to make sure you are in the right file directory you want to use the command

"git status"

to check if you saved your files (it will show up as red)

"Git add [filename]"

this will prepare your file to be commited

"git status"

the file name should be green now

"git commit -m "[changes you made as a comment]" "

this will commit your changes

"git push"

this will save your changes into the branch

Parts

125
QtyValueFootprintReferences
181kResistor_SMD:R_0805_2012MetricR108, R109, R110, R112, R127, R128, R129, R130, R131, R132, R135, R136, R209, R210, R212, R214 +2
15IRLML2060Package_TO_SOT_SMD:SOT-23_HandsolderingQ101, Q102, Q103, Q104, Q105, Q106, Q107, Q108, Q109, Q201, Q202, Q204, Q205, Q206, Q207
12100Resistor_SMD:R_0805_2012MetricR102, R111, R115, R116, R133, R134, R202, R204, R211, R213, R215, R220
111MResistor_SMD:R_0805_2012MetricR101, R103, R107, R113, R114, R117, R118, R124, R126, R203, R221
8100nCapacitor_SMD:C_0805_2012MetricC103, C104, C109, C110, C111, C112, C113, C114
6330uCapacitor_Tantalum_SMD:CP_EIA-7343-30_AVX-N_Pad2.25x2.55mm_HandSolderC101, C102, C105, C106, C107, C108
6SW_PushConnector_Hirose:Hirose_DF13-02P-1.25DSA_1x02_P1.25mm_VerticalSW201, SW202, SW203, SW204, SW205, SW206
4CPC1117NPackage_SO:SOP-4_3.8x4.1mm_P2.54mmU230, U240, U250, U260
4MountingHoleMountingHole:MountingHole_3.2mm_M3_ISO7380_Pad_TopBottomH101, H102, H103, H104
31KResistor_SMD:R_0805_2012MetricR104, R119, R120
33.48MResistor_SMD:R_0805_2012MetricR105, R121, R122
3442KResistor_SMD:R_0805_2012MetricR106, R123, R125
3Conn_01x02Connector_Hirose:Hirose_DF13-02P-1.25DSA_1x02_P1.25mm_VerticalJ204, J205, J206
3LM397MFPackage_TO_SOT_SMD:TSOT-23-5_HandSolderingU101, U102, U103
2Battery_CellBattery:BatteryHolder_Keystone_1060_1x2032BT201, BT202
2Conn_02x26_Odd_EvenConnector_PinSocket_2.54mm:PinSocket_2x26_P2.54mm_VerticalJ101, J103
2LEDLED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolderD205, D206
10.1uFCapacitor_SMD:C_0805_2012MetricC205
11.5nFCapacitor_SMD:C_0805_2012MetricC207
110uFCapacitor_SMD:C_0805_2012MetricC204
110uHSumida_inductor:Sumida_inductorL201
115kResistor_SMD:R_0805_2012MetricR206
1200kResistor_SMD:R_0805_2012MetricR208
122uFCapacitor_SMD:C_1210_3225Metric_Pad1.33x2.70mm_HandSolderC208
13MResistor_SMD:R_0805_2012MetricR201
15.0SMDJ5.0ADiode_SMD:D_SMC_HandsolderingD201
15.1MResistor_SMD:R_0805_2012MetricR137
160.4KResistor_SMD:R_0805_2012MetricR205
1619kResistor_SMD:R_0805_2012MetricR207
1BAT54CDWPackage_TO_SOT_SMD:SOT-363_SC-70-6_HandsolderingD204
1CD4052BPackage_SO:TSSOP-16_4.4x5mm_P0.65mmU104
1Conn_01x03Connector_Hirose:Hirose_DF13C_CL535-0403-5-51_1x03-1MP_P1.25mm_VerticalJ203
1Conn_01x05Connector_Hirose:Hirose_DF13-05P-1.25DSA_1x05_P1.25mm_VerticalJ202
1Conn_01x07Connector_Molex:Molex_PicoBlade_53047-0710_1x07_P1.25mm_VerticalJ201
1LOGOUSSTlogo:USSTLOGOG***
1LTC3440EMSPBFPackage_SO:MSOP-10_3x3mm_P0.5mmU202
1MBRM120LT3GDiode_SMD:D_Powermite_AKD203

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Questions

How big is the RADSAT SK Timer PCB?

It measures 90.2 × 95.9 mm and has 2 copper layers, 1.6 mm thick.

What parts does the RADSAT SK Timer use?

125 parts, built around the CPC1117N, LM397MF, CD4052BM and 5.0SMDJ5.0A. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the RADSAT SK Timer KiCad files?

From the USST-RADSAT-SK/power-and-electrical repository on GitHub, at the commit this page was made from: the board is RADSAT-SK Timer/RADSAT-SK Timer.kicad_pcb and its schematic 555_timer/555_timer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the RADSAT SK Timer design in my own project?

Its repository states no licence, so its author keeps all rights: ask USST-RADSAT-SK before reusing the design.