Search found 466 matches

by parkview
Tue Apr 13, 2021 10:08 am
Forum: Projects
Topic: USB Cable Power Tester
Replies: 2
Views: 60

Re: USB Cable Power Tester

I used the revamped board to test a number of USB-Micro cables at the April 2021 SW Makers meeting. Based on feed back from that, I have modified the design a bit and a second revision is currently being manufactured at JLCPCB. cable-testing.jpg I also compared my boards readings against a milli-ohm...
by parkview
Mon Apr 05, 2021 5:47 pm
Forum: Projects
Topic: USB Cable Power Tester
Replies: 2
Views: 60

Re: USB Cable Power Tester

Three manufacturing days and 20 shipping days and the JLCPCB was in my hands. I laser cut a plastic stencil for the PCB and hand picked and placed the components before hotplate soldered it up. There was a bit of excess solder, but solder wick made a short work fix for it: ready-for-testing.jpg Next...
by parkview
Tue Mar 23, 2021 5:14 pm
Forum: Projects
Topic: USB Connector Sampler PCB
Replies: 0
Views: 33

USB Connector Sampler PCB

I have so many types of USB connectors that I have either picked up at the Shenzhen Electronics Markets or purchased from Aliexpress over the years. Over time I have settled on one or two kinds each. To help find the KiCAD Symbol, footprints and 3D files necessary I have created what I call a USB Sa...
by parkview
Mon Mar 22, 2021 9:34 pm
Forum: General Electronics
Topic: Laser Cutting Plastic Solder Paste Stencils
Replies: 0
Views: 39

Laser Cutting Plastic Solder Paste Stencils

I have now made up 40+ PCB's using home made plastic stencils. I laser cut 0.1mm thick Mylar using my 60W laser cutter. When I say cut, I actually mean raster etch, as this makes for a much cleaner hole cut. The 750x750mm plastic sheet was purchased from a local Art supply shop for maybe $12, so it ...
by parkview
Sat Mar 20, 2021 4:44 pm
Forum: Projects
Topic: Raspberry Pi - Z80 Controller
Replies: 1
Views: 60

Re: Raspberry Pi - Z80 Controller

The PCB arrived last week. Some of the parts arrived a few days later, so that allowed me to put the board together: Z80-running2.jpg So, there are two PCB design errors: 1) wrong ZIF/Z80 socket used 2) I didn't include a i2C 3.3V to 5V level translation 3) while the PCB fit, and I did test a paper ...
by parkview
Sat Mar 06, 2021 2:53 pm
Forum: Projects
Topic: Acrylic Display Sign
Replies: 0
Views: 51

Acrylic Display Sign

In 2020, Stephen showed me a USB power Acrylic display sign that he had quickly made up for an event. Months later I was at a monthly Robotics meeting meeting and it occurred to me that it would be handy to a battery powered sign that could have removable Acrylic signs that can be swapped out for th...
by parkview
Tue Mar 02, 2021 10:47 pm
Forum: Projects
Topic: USB Cable Power Tester
Replies: 2
Views: 60

USB Cable Power Tester

Over the years, I have purchased many USB micro cables and USB iPhone charging cables. Some of these have been at the famous Shenzhen Electronics Markets, where you can find them stacked up high: USB Cables.jpg However, it's a buyer beware market. Size and looks count for nothing. One year, just to ...
by parkview
Sat Feb 27, 2021 1:53 pm
Forum: Projects
Topic: USB Power Controller
Replies: 3
Views: 2515

Re: USB Power Controller

I titled this forum post: USB Power Controller, but a better title might be: USB LED Controller, as this ESP32 based board will control up to 3 strings of USB 5V fairy lights and 2 strings of WS2812 RGB LEDs. In this next version 1.2 of the PCB, I have fixed a footprint error and a double cross over...
by parkview
Sat Feb 20, 2021 8:32 pm
Forum: Projects
Topic: Arduino Sensor Training Board
Replies: 3
Views: 381

Re: Arduino Sensor Training Board

A new updated set of KiCAD Gerber files have been sent off to JLCPCB for manufacture. This will be version 0.7 and be manufactured with a blue solder mask. I find it's handy to have a different colour for each version as it quickly differentiates the few PCB versions you might have lying around on a...
by parkview
Sat Feb 13, 2021 4:38 pm
Forum: Projects
Topic: Raspberry Pi - Z80 Controller
Replies: 1
Views: 60

Raspberry Pi - Z80 Controller

James from the UK recently wrote up about his Raspberry Pi - Z80 controller project up on Hackster: https://www.hackster.io/james-fitzjohn/raspberry-pi-to-z80-interface-0bfbeb A few days later it popped up on H-a-D and into my RSS news feed: https://hackaday.com/2021/02/09/interfacing-a-z80-cpu-with...
by parkview
Sat Jan 23, 2021 8:38 am
Forum: Projects
Topic: Arduino Sensor Training Board
Replies: 3
Views: 381

Re: Arduino Sensor Training Board

I designed up a simple breadboard expansion header socket. I have some 16pin ribbon cables that will connect the breadboard to the Arduino Sensor board:
Arduino Header Extension_sml.jpg
Arduino Header Extension_sml.jpg (48.59 KiB) Viewed 251 times
by parkview
Sun Jan 10, 2021 9:29 am
Forum: Projects
Topic: Arduino Sensor Training Board
Replies: 3
Views: 381

Re: Arduino Sensor Training Board

The PCB arrived a month or so ago. I used my hotplate to assemble components onto the PCB. There are a few IC footprint errors, but the rest looks ok. Next up is software. I have been busy writing Arduino based software functions to test out each of the sections and IC's on the PCB. I first used the...
by parkview
Sun Nov 22, 2020 4:22 pm
Forum: Projects
Topic: Ultrasonic Microphone
Replies: 0
Views: 232

Ultrasonic Microphone

A couple of the SW Makers crowd have been talking about making an ultrasonic Bat Detector. I have played around with a couple of home made Electrit microphone circuits however they haven't works as they should and my 40+yr function generator has decided to stop working. Thinking it might be the elec...
by parkview
Fri Nov 06, 2020 9:36 pm
Forum: Projects
Topic: Helmet Orchid Pollinator Study
Replies: 24
Views: 10686

Re: Helmet Orchid Pollinator Study

I gave a talk on this project to a local Bunbury group the other day and as I am in a bit of a electronics mode, I decided to whip up a nice looking PCB for it. This will include a buzzer and a 5 way navigation tactile menu switch. This will allow me to automate a bit more of the running of the came...
by parkview
Mon Nov 02, 2020 12:04 pm
Forum: Projects
Topic: ESP32 RGB LED Basic Controller
Replies: 0
Views: 242

ESP32 RGB LED Basic Controller

One of the previous projects I posted was a ESP32 RGB LED controller that included a few different sensors and it also provided control over 3 strings of plain USB powered strings of LEDs. I wanted this board to be a basic no-frills RGB LED controller. Having said that, it does have provision for a ...
by parkview
Sat Oct 31, 2020 12:09 pm
Forum: Projects
Topic: Arduino Sensor Training Board
Replies: 3
Views: 381

Arduino Sensor Training Board

One day I might want to do some public Arduino training and I think it would be handy to have all the sensors I want to talk about on one handy PCB. This will help in packing and transportation and in losing a sensor or two here and there. I am really enjoying the ESP32-WROOM MCU at the moment. It's...
by parkview
Fri Oct 23, 2020 10:29 pm
Forum: Projects
Topic: USB Power Controller
Replies: 3
Views: 2515

Re: USB Power Controller

There prototype board ended up with a few fixup wires, but I eventually was able to get the IMU MPU6050 6DoF IC and the SPH0645 MEMS Microphone recognised via Arduino software. From there it was then time to plan out a new revision of the PCB. This time, I shrunk the PCB real estate to as small as I...
by parkview
Mon Oct 19, 2020 12:25 pm
Forum: Projects
Topic: 12V Power Distribution and Monitoring Board
Replies: 10
Views: 4209

Re: 12V Power Distribution and Monitoring Board

Never say never my Grandmother use to say. While the MQTT control software is completed, it bugged me that the two input reverse polarity protection MOSFETs didn't also act as diodes. This meant that the two input notification LEDs would light up even if there was only one good power input. Kind of ...
by parkview
Mon Jul 20, 2020 10:24 pm
Forum: Projects
Topic: 12V Power Distribution and Monitoring Board
Replies: 10
Views: 4209

Re: 12V Power Distribution and Monitoring Board

I think I applied too much solder paste on the central heatsink pad of the USB-UART CP2102 IC, as initially I couldn't talk to the ESP32. All the pins looked ok and there where no shorted pins that I could find. I hot-aired off the IC and removed the pool of solder on the heatsink pad and soldered i...
by parkview
Sat Jul 11, 2020 8:54 pm
Forum: Projects
Topic: 12V Power Distribution and Monitoring Board
Replies: 10
Views: 4209

Re: 12V Power Distribution and Monitoring Board

The PCB arrived the other day so I laid out the 100+ components, laser cut out a 0.1mm thick plastic stencil, solder pasted it up, laid on the components and hot plated the board. It came out looking great with only a few solder bridges on some of the finer pitched traces. These only took a few minu...