Search found 416 matches

by parkview
Mon Jan 27, 2020 10:06 pm
Forum: Projects
Topic: STM32F042 Dev Board
Replies: 0
Views: 57

STM32F042 Dev Board

I went looking for a STM32F042F4P6 dev board on Aliexpress yesterday. Such a thing doesn't exist!! There is the poor cousin, the STM32F030, but that's it. This afternoons project was to whip one up: STM32F042F4P6 PCB V1.0.jpg Not much to it, just the basics plus a DIP switch and a LED etc. It's only...
by parkview
Fri Jan 24, 2020 4:45 pm
Forum: Projects
Topic: Digital LED Candle
Replies: 4
Views: 200

Re: Digital LED Candle

The PCB arrived back from JLCPCB, Shenzhen the other day. Four days in production and 17 days in transit and according to the tracking, most of that was in Australia! I like to gather all the components together and lay them out neatly, ready for placement: component-layout.jpg I experimented with a...
by parkview
Sat Jan 18, 2020 9:29 pm
Forum: General Electronics
Topic: Low Voltage Drop Input Voltage Protection
Replies: 0
Views: 42

Low Voltage Drop Input Voltage Protection

For many years now I have used a Schottky Diode as my input reverse voltage protection device. Depending on the type of diode and current drawn, these usually give a voltage drop between 0.3V and 0.5V. This is better than a normal power diode which might give you a drop of 0.6V to 0.7V. The other da...
by parkview
Sat Jan 18, 2020 8:53 pm
Forum: Projects
Topic: Cat Buzzer
Replies: 0
Views: 50

Cat Buzzer

There where three cats living at Steamhead Maker Space in Shenzhen. This made for a lively show every now and then as each one woudl try to be king of the mat or box. I thought it might be fun to make a small randomized buzzer that would buzz for a second then go back to sleep for 30 to 60 minutes. ...
by parkview
Sun Jan 05, 2020 2:37 pm
Forum: General Electronics
Topic: How to Turn PDF based IC Chip layouts into KiCAD Symbols
Replies: 1
Views: 79

Re: How to Turn PDF based IC Chip layouts into KiCAD Symbols

Oh, and if you don't want to use the CLI conversion software, you can do it one by one via the GUI Editor:
GUI PDF Conversion.jpg
GUI PDF Conversion.jpg (33.46 KiB) Viewed 78 times
by parkview
Sun Jan 05, 2020 2:18 pm
Forum: General Electronics
Topic: How to Turn PDF based IC Chip layouts into KiCAD Symbols
Replies: 1
Views: 79

How to Turn PDF based IC Chip layouts into KiCAD Symbols

I am currently going through a spurt of KiCAD projects. I needed to create a few STM32 64 pin symbols and process some other chips. I was going to grab something that was close and manually convert it to what I need or just draw them up from scratch. This is a great time to try out the free 'uConfig...
by parkview
Sat Jan 04, 2020 2:53 pm
Forum: Projects
Topic: Playing Around with LEDs and Clothing Toggles
Replies: 0
Views: 87

Playing Around with LEDs and Clothing Toggles

Back in 2017 a group of us where touring the fairy land of the Shaibu Fabric Markets in Shenzhen (Take Exit C at the Shaibu Station): fabric_buildings.jpg One building has a few floors that are a wonderland of fabric bling: Shaibu_Markets1.jpg Shaibu2.jpg Shaibu3.jpg shaibu4.jpg I came across some c...
by parkview
Fri Jan 03, 2020 1:14 pm
Forum: Projects
Topic: Playing around with a Risc-V demo processor board
Replies: 1
Views: 98

Re: Playing around with a Risc-V demo processor board

So lets have a play with writing a simple program using the Arduino framework on PlatformIO. After installing the Sipeed Longan Nano-Lite board form the home page, I created a new project with this code: platformio.ini config: [env:sipeed-longan-nano-lite] platform = gd32v board = sipeed-longan-nano...
by parkview
Fri Jan 03, 2020 1:06 pm
Forum: Projects
Topic: Playing around with a Risc-V demo processor board
Replies: 1
Views: 98

Playing around with a Risc-V demo processor board

The RISC-V processor is one of the first open source intellectual property rights free CPU. This means anyone (or company), can use the files and information to create their own RSIC-V core CPU. More info can be found here: https://riscv.org/ I have been following it's journy for a number of years, ...
by parkview
Sat Dec 28, 2019 6:09 pm
Forum: Product Reviews
Topic: KiCAD Librarian Software
Replies: 0
Views: 122

KiCAD Librarian Software

Over the years I have created quite a few specialised component symbols and footprints in KiCAD 4 and 5. For the footprints I found I could just move the *.pretty files into one directory. Yes, it stuffed up all the old projects, but they can be reloaded/re-linked when I next access them. The Symbol...
by parkview
Sat Dec 28, 2019 1:26 pm
Forum: Projects
Topic: Digital LED Candle
Replies: 4
Views: 200

Re: Digital LED Candle

So a quick trace re-route fixed the PCB layout fault: LED_Candle_V1.2_PCB-fix.jpg However, it was still rather long, so for Version 1.3 I re-sized the resistors down to 0603 and found that the STM32 SWD programming port didn't need 6 wires, so I replaced the socket with a smaller 4 pin socket. With ...
by parkview
Sat Dec 28, 2019 1:04 pm
Forum: Projects
Topic: Digital LED Candle
Replies: 4
Views: 200

Re: Digital LED Candle

So the PCB Version 1.1 was a success and I quickly had the LEDs blinking via an Arduino Nano. While it works well, I didn't really want to have to insert a Nano, battery AND my LED PCB into our lanterns. I have been meaning to learn the STM32 platform of MCU's, so this felt like a perfect time to ha...
by parkview
Sat Dec 14, 2019 7:36 pm
Forum: Projects
Topic: Simple USB Cable Tester
Replies: 0
Views: 108

Simple USB Cable Tester

Steamhead, being a Maker Space, has a lot of USB cables. Some of these might be broken, or only have two power wires for charging something, or might be intermittent or broken wires. I was working on a Arduino Nano project and didn't know if it was the old Nano I have been carting around Asia for th...
by parkview
Sat Dec 14, 2019 6:54 pm
Forum: Projects
Topic: Solder Practice Board
Replies: 0
Views: 98

Solder Practice Board

You can find many cheap and interesting SMD or Through-Hole soldering practice PCBs on-line. I thought I would have a go at making my own in KiCAD, with some Steamhead branding. It's a simple two transistor mono-stable blinky LED device and combines a few through-hole and simple SMD components. JLCP...
by parkview
Sat Dec 14, 2019 5:43 pm
Forum: Product Reviews
Topic: Chinese PCB Hot Plate
Replies: 0
Views: 98

Chinese PCB Hot Plate

Been designing quite a few PCB's while staying at the Shenzhen Steamhead Maker Space. One bug bear is the lack of a PCB Reflow oven or a hot air gun. This was fixed by purchasing a small 400W Chinese PCB Hot Plate. This cost RMB170, or about A$36 and was donated to Steamhead. PCB-Hot-Plate_sml.jpg W...
by parkview
Sat Dec 14, 2019 5:14 pm
Forum: Projects
Topic: Digital LED Candle
Replies: 4
Views: 200

Digital LED Candle

I have always wanted to make my own digital LED candle. Since I am currently in Shenzhen, China - the capital of the world for electronics, I thought it could make a quick simple project to do here. No real pre-project specs, just that it must have multiple LEDs and use side-lit fibre optical cable....
by parkview
Thu Oct 10, 2019 1:09 pm
Forum: Projects
Topic: WiFi LED Matrix Display
Replies: 2
Views: 450

Re: WiFi LED Matrix Display

Now that I have a working LED display on WiFi, I have configured to be either an independent WiFi Access Point, or at a push of a button, it can connect to a previously configured network (Static IP, or DHCP IP). I was walking the Shenzhen HQB electronics markets the other day and came across an ESP...
by parkview
Mon Oct 07, 2019 12:16 pm
Forum: Projects
Topic: WiFi LED Matrix Display
Replies: 2
Views: 450

Re: WiFi LED Matrix Display

The LED Display Arduino code and webpage have now been updated to display a SW Maker logo. Three seconds after you turn on the Display, the colourful SW Maker logo is displayed: swmakers-colour.jpg If you then attach your computer/mobile device onto the 'SWMakerDraw' LED Display Access Point, this w...
by parkview
Sun Sep 29, 2019 8:27 pm
Forum: Projects
Topic: WiFi LED Matrix Display
Replies: 2
Views: 450

WiFi LED Matrix Display

While volunteering at the 2019 BSide cyber security conference: https://bsidesperth.com.au/, I came across a cute 16 x 16 LED Matrix display. This used an ESP8266 to host a WiFi access point to display a webpage that allowed you to draw patterns that could be submitted to be displayed onto the matri...
by parkview
Wed Sep 18, 2019 11:57 am
Forum: Projects
Topic: Mobile Game Tracking Rig
Replies: 1
Views: 361

Re: Mobile Game Tracking Rig

The above rig was built around a RPi 2B computer board. I found that it would OCR a screen photo in about 5-6 seconds. Driving at the speed limit of 110km gives us around 9.8 seconds before we enter the next 300m cell. Not much time to react to any information that might have been gleaned from the O...