# Mark Wu **Handle:** @markwuflux ## Bio Obsessed with fast iteration times. Want to improve the velocity of electronics prototyping from design, manufacturing, and testing. ## Stats - **Projects:** 235 - **Components:** 117 - **Followers:** 50 - **Following:** 9 ## Social - Twitter: [@markwuelectric](https://twitter.com/markwuelectric) ## More - [Starred Projects](https://www.flux.ai/markwuflux/starred.md) ## Projects (Page 1 of 2, 31 total) - [High Voltage Power Supply V1](https://www.flux.ai/markwuflux/high-voltage-power-supply-v1.md) - 24VDC Input 5kV Output MCU controlled 200kHz PWM Mosfet based inverter 6 stage multiplier Todo: Pick real inductor in load network Flyback Transformer with Ferrite core Selection - [EV5920-5048-V-00A Evaluation Board](https://www.flux.ai/markwuflux/ev5920-5048-v-00a-evaluation-board.md) - This is a recreation of the [EV5920-5048-V-00A](https://www.monolithicpower.com/en/ev5920-5048-v-00a.html) from MPS which demonstrates a MP5920 Hot-Swap controller commanding 5 MP5048 e-fuses in parallel. WIP Items: -Routing In flux, this project demonstrates hierarchal design through the use of modules. Additionally, parametric symbols are used extensively to improve schematic cleanliness. Components in the canvas are locked because their positions correspond to the same positions as the original layout. Changelog from Original MPS Design: - Not including GPIO2 or GPIO3 as included in the original board due to NC pin name on the IC. - PC1 and PC2 footprints are 5mm in pitch and 12.5mm in diameter rather than the 16mm diameter in the original layout. This change corresponds with the selected part more accurately. -Renamed Designators to be More Verbose - [Lethal Company Pro Flashlight Power Board V1](https://www.flux.ai/markwuflux/lethal-company-pro-flashlight-power-board-v1.md) - Lethal Company Pro Flashlight Broken Features: - U2M cannot be line powered from this circuit so the LED driver does not regulate. [Find the acompanying button board here](https://www.flux.ai/markwuflux/lethal-company-pro-flashlight-button-board) -Ultra bright -Makes click noise from speaker -Wirelessly transmits battery life (maybe use Ubo to receive this) -Drive a SST-40 Chinese LED I want this thing to be super bright! The brighter the better, but keep it simple. These LEDs will draw a lot of power, so we need some sort of CC source. It doesn't have to have high bandwidth. I am thinking about a DIY microcontroller buck converter with PID duty cycle control. Mistakes in this V1 design: - No pullup resistor on PG of Module1 - [Universal Electronic Derailleur V1](https://www.flux.ai/markwuflux/universal-electronic-derailleur-v1.md) - NOTICE: This board has a incorrectly sized battery holder. If building this revision, also build the [adaptor board](flux.ai/markwuflux/adaptor-board-for-universal-electronic-derailleur-v1) Cable Index Shifting Electronic Derailleur. The first version just uses a linear actuator because I suck at ME design. I imagine it would be pretty easy to build a reeling one with positional feedback. - [Adaptor Board for Universal Electronic Derailleur V1](https://www.flux.ai/markwuflux/adaptor-board-for-universal-electronic-derailleur-v1.md) - I messed up the battery dimensions on the V1 so here is a CNC-able fix to adapt the original battery to the original PCB. - [10440 Battery Holder](https://www.flux.ai/markwuflux/10440-battery-holder.md) - 10440 Battery Holder Using 2x MY-AAA-02 - [MY-AAA-02](https://www.flux.ai/markwuflux/my-aaa-02.md) - MYAAA02 https://datasheet.lcsc.com/lcsc/2111111730_MYOUNG-MY-AAA-02_C964880.pdf Plugin Battery Connectors ROHS 12.9 MYOUNG MY-AAA-02 - [MP5920 Module](https://www.flux.ai/markwuflux/mp5920-module.md) - This is a MP5920 module which mirrors the [EV5920-5048-V-00A reference design](https://www.monolithicpower.com/en/ev5920-5048-v-00a.html) You can utilize this module as many times as you like in your project without having to recreate the layout each time. #module #mps #smd #server - [Pin Header 01x01 2.54mm Vertical - Circular Pad](https://www.flux.ai/markwuflux/pin-header-01x01-2p54mm-vertical-circular-pad.md) - Through Hole straight pin header, 01x01, 2.54mm pitch, single row #connector #pinheader #tht - [450301014042](https://www.flux.ai/markwuflux/450301014042.md) - 450301014042 https://datasheet.datasheetarchive.com/originals/distributors/DKDS-9/165080.pdf Mini Slide Switch 10x2.5mm SPDT on / on Through Hole Slide Switch SPDT On-On 100 mA@ 42 V dc Slide Wurth Elektronik 450301014042 710-450301014042 https://www.mouser.co.uk/ProductDetail/Wurth-Elektronik/450301014042?qs=wr8lucFkNMW0uepaR4R%2Fww%3D%3D - [7701](https://www.flux.ai/markwuflux/7701.md) - 7701 http://keyelco.com/userAssets/file/M65p66.pdf KEYSTONE - 7701 - PC SCREW TERMINAL, 22-14AWG 8 Keystone Electronics 7701 534-7701 https://www.mouser.co.uk/ProductDetail/Keystone-Electronics/7701?qs=xAjc%252BIZFyb6p42z3bLuhEw%3D%3D 7701 https://www.arrow.com/en/products/7701/keystone-electronics - [Custom Test Platform V1](https://www.flux.ai/markwuflux/custom-test-platform-v1.md) - I want to create a standard interface from my PCBs to my test equipment. My equipment: PSU: Rigol DP832 Scope: Siglent SDS 1202X-E WaveGen: Siglent SDG810 Logic Analyzer: DSLogic Plus 400MHz VNA: NanoVNA V2 6 scope channels (4 1X, 2 10X) 8 Logic Analyzer channels 1 Wavegen channel 4 Power Nets ( 2 pins each) (tie power nets to oscilloscope inputs) #template #testing - [MP5048AGU-P Module](https://www.flux.ai/markwuflux/mp5048agu-p-module.md) - This is a MP5048AGU-P module which mirrors the [EV5920-5048-V-00A reference design](https://www.monolithicpower.com/en/ev5920-5048-v-00a.html) You can utilize this module as many times as you like in your project without having to recreate the layout each time. #module #mps #smd #server - [Part Creation Template](https://www.flux.ai/markwuflux/part-creation-template.md) - This is my part creation template. These are the minimum properties I think a quality part should contain. Note: This template does not support parametric symbols. #template - [Base Template V2](https://www.flux.ai/markwuflux/base-template-v2.md) - Improvements from V1: - Support for Parametric Symbols - More direct REF and VALUE targeting My default template #template - [Base Template V1](https://www.flux.ai/markwuflux/base-template-v1.md) - My default template #template - [Lethal Company Pro Flashlight Button Board](https://www.flux.ai/markwuflux/lethal-company-pro-flashlight-button-board.md) - This is the button board for the Lethal Company Power Board - [S2B-XH-A-1(LF)(SN)](https://www.flux.ai/markwuflux/s2b-xh-a-1lfsn.md) - S2BXHA1LFSN http://www.jst-mfg.com/product/pdf/eng/eXH.pdf CONN HEADER R/A 2POS 2.5MM 6.1 JST (JAPAN SOLDERLESS TERMINALS) S2B-XH-A-1(LF)(SN) - [ZXCT1110W5-7](https://www.flux.ai/markwuflux/zxct1110w5-7.md) - SOT-25 Current-Sensing Amplifiers ROHS Imported from Samacsys: SOT95P285X140-5N http://componentsearchengine.com/Datasheets/1/ZXCT1110W5-7.pdf LOW POWER HIGH-SIDE CURRENT MONITORS 1.4 Diodes Incorporated ZXCT1110W5-7 522-ZXCT1110W5-7 https://www.mouser.co.uk/ProductDetail/Diodes-Incorporated/ZXCT1110W5-7?qs=SmNRpHVzdgiw7jhR25zi0w%3D%3D ZXCT1110W5-7 https://www.arrow.com/en/products/zxct1110w5-7/diodes-incorporated?region=nac - [TPS63051RMWR](https://www.flux.ai/markwuflux/tps63051rmwr.md) - QFN50P250X250X100-12N-D http://www.ti.com/lit/gpn/tps63051 Tiny Single Inductor Buck Boost Converter 1 Texas Instruments TPS63051RMWR 595-TPS63051RMWR https://www.arrow.com/en/products/tps63051rmwr/texas-instruments?region=nac - [Inductor 4mm x 4mm (4012)](https://www.flux.ai/markwuflux/inductor-4mm-x-4mm-4012.md) - 4mm x 4mm inductor package. e.g. FNR4012S1R5MT - [FXL0420 4.2mm x 4.4mm inductor](https://www.flux.ai/markwuflux/fxl0420-4p2mm-x-4p4mm-inductor.md) - This footprint works for all FXL0420 inductors by cjiang SMD,4.2x4.4mm Power Inductors ROHS #inductor - [TPS63020DSJR](https://www.flux.ai/markwuflux/tps63020dsjr.md) - Buck-boost type Adjustable 1.2V~5.5V 1.8V~5.5V 3.5A VSON-14-EP(3x4) DC-DC Converters ROHS Imported from Samacsys TPS63020DSJR https://www.ti.com/lit/ds/symlink/tps63020.pdf?HQS=dis-dk-null-digikeymode-dsf-pf-null-wwe&ts=1623612296427 Conv DC-DC 1.8V to 5.5V Synchronous Step Down/Synchronous Step Up Single-Out 1.2V to 5.5V 3A 14-Pin VSON EP T/R 1 Texas Instruments TPS63020DSJR 595-TPS63020DSJR https://www.mouser.co.uk/ProductDetail/Texas-Instruments/TPS63020DSJR?qs=C44r%252BX3hXgL3LjjgiOMWew%3D%3D TPS63020DSJR https://www.arrow.com/en/products/tps63020dsjr/texas-instruments?region=nac #part #buckboost - [Battery Load Switch Module Bottom Layer](https://www.flux.ai/markwuflux/battery-load-switch-module-bottom-layer.md) - A simple load switch module to switch between Battery and 5V power - [Buck Boost 3.3V 500mA Module](https://www.flux.ai/markwuflux/buck-boost-3p3v-500ma-module.md) - A buck boost converter that can be powered from a Li-Ion battery and output 3.3V @ 500mA. Powered by the TPS63051RMWR. EN is internally pulled up to VIN Input Voltage Range: 2.5V to 5.5V - [Test Interface V1 Pinout AFC07-S24ECA-00 ](https://www.flux.ai/markwuflux/test-interface-v1-pinout-afc07-s24eca-00.md) - AFC07S24ECA00 https://datasheet.lcsc.com/szlcsc/1811021337_JUSHUO-AFC07-S24ECA-00_C262643.pdf P=0.5mm FFC, FPC Connectors RoHS 2 JUSHUO AFC07-S24ECA-00 - [MAX98357AETE+T](https://www.flux.ai/markwuflux/max98357aeteplust.md) - 3.2Wx2@4Ω TQFN-16-EP(3x3) Audio Power OpAmps ROHS Imported from Samacsys QFN50P300X300X80-17N https://datasheets.maximintegrated.com/en/ds/MAX98357A-MAX98357B.pdf Audio Amplifiers Digital Input Class D Amplifier 0.8 Analog Devices MAX98357AETE+T 700-MAX98357AETE+T https://www.mouser.co.uk/ProductDetail/Analog-Devices-Maxim-Integrated/MAX98357AETE%2bT?qs=AAveGqk956HhNpoJjF5x2g%3D%3D MAX98357AETE+T https://www.arrow.com/en/products/max98357aetet/analog-devices?region=nac #part - [40mmSqaure13.56MHzAntenna 2.41uH](https://www.flux.ai/markwuflux/40mmsqaure13p56mhzantenna-2p41uh.md) - 2.41uH Inductor @ targeted 13.56MHz NFC Inductor Played around in the [ST coil calculator](https://eds.st.com/antenna/#/) assumption: dielectric constant of 4.5 trace thickness of 35um (1oz/sqft) results: 40x40mm 300um trace width 410um spacing 5 turns #NFC #coil #inductor #pcbinductor - [PCB Business Card V2](https://www.flux.ai/markwuflux/pcb-business-card-v2.md) - Change History from V1: -13.56MHz tuning -larger instruction font -put some stuff on the back #template I wanted to create a business card that has some functionality and shows off a bit of my portfolio IRL: -NFC to my flux page -here's the [instructables](https://www.instructables.com/PCB-Business-Card-With-NFC-Make-Yours-With-NFC-QR-/) -Put a bunch of modules on it Find the BoM [here](https://www.digikey.com/short/2db2vnmp) - [Universal Electronic Derailleur V1 AMS ordering](https://www.flux.ai/markwuflux/universal-electronic-derailleur-v1-ams-ordering.md) - Cable Index Shifting Electronic Derailleur. The first version just uses a linear actuator because I suck at ME design. I imagine it would be pretty easy to build a reeling one with positional feedback. ## Pages - [Next Page](https://www.flux.ai/markwuflux.md?page=2) - Pages: **1** [2](https://www.flux.ai/markwuflux.md?page=2) --- *Generated from [https://www.flux.ai/markwuflux](https://www.flux.ai/markwuflux)*