Search found 448 matches

by parkview
Mon Jul 20, 2020 10:24 pm
Forum: Projects
Topic: 12V Power Distribution and Monitoring Board
Replies: 9
Views: 2949

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: 9
Views: 2949

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...
by parkview
Wed Jun 03, 2020 10:45 pm
Forum: Projects
Topic: USB Breakout Board
Replies: 2
Views: 1227

Re: USB Breakout Board

The USB Breakout PCB arrived this morning. I made a few of these up in the afternoon. Only five SMD parts, so it didn't take long to laser cut a stencil and hotplate the parts into place. It took a bit longer to then hand solder all the Through Hole parts into place: USB_Protection_Board_sml.jpg I a...
by parkview
Mon Jun 01, 2020 7:34 pm
Forum: General Electronics
Topic: Making 3D Models for KiCAD
Replies: 0
Views: 512

Making 3D Models for KiCAD

One thing I have done before in KiCAD was create a 3D model of a part so that it could be displayed in the 3D viewer. I quickly found this tutorial online: https://www.workshopshed.com/2019/04/creating-a-3d-model-for-kicad/ That didn't look too hard so I gave it a go. I first sat down and measured a...
by parkview
Sun May 31, 2020 11:17 am
Forum: Projects
Topic: Project: Camera-Pi
Replies: 6
Views: 1849

Re: Project: Camera-Pi

The new Camera-Pi version 2.1 arrived the other day. I laser cut out a 0.1mm thick solder stencil and hotplated the components on: camera-pi-v2.1_PCB_sml.jpg This PCB now has a 3V to 5V at up to 2A voltage boost circuit on the PCB. This will allow me to easily monitor the battery voltage and current...
by parkview
Mon May 18, 2020 5:42 pm
Forum: Projects
Topic: USB Power Controller
Replies: 1
Views: 2073

Re: USB Power Controller

The PCB arrived back from manufacturing. The INA193 current sensors still have arrived, but I have received a free sample from TI. The ESP32 controllers have arrived either, so I hot-plated one from another spare dev board I had lying around. There where only a few blobs of solder over a few of the ...
by parkview
Sat May 16, 2020 12:28 pm
Forum: Product Reviews
Topic: A review of Three Chinese PCB Manufactures
Replies: 3
Views: 2810

Re: A review of Three Chinese PCB Manufactures

I have used around 7 or so Chinese PCB manufacturers by now. My current favourite PCB manufacture is JLCPCB: https://jlcpcb.com/ . They currently offer US$2.00 for 5 10x10cm PCBs + shipping. Before C19 and the US/AU dollar slipping, it was as cheap as A$12.84 including shipping. This included a 24 d...
by parkview
Sun May 10, 2020 4:01 pm
Forum: Projects
Topic: Laser Power Meter
Replies: 1
Views: 673

Re: Laser Power Meter

It didn't take long to quickly whip up a circuit diagram that's powered by a STM32F042: Laswer Power Meter - Schematic V1.0_sml.jpg The results are displayed on a small 128x64 SD1306 OLED screen. There is a buzzer mounted under the PCB to save space and allow the OLED screen to be mounted closer to ...
by parkview
Sun May 10, 2020 3:45 pm
Forum: Projects
Topic: Laser Power Meter
Replies: 1
Views: 673

Laser Power Meter

It's a joy to have and use a CO2 laser cutter. Over time, I have wondered if the tube's power might decline. If so, by how much? Also, the machine came with a set of three 20mm mirrors. The back's of the mirrors heat up quite a bit, so therefore they are not close to 100% efficient reflectivity. All...
by parkview
Sun May 10, 2020 3:12 pm
Forum: Projects
Topic: 12V Power Distribution and Monitoring Board
Replies: 9
Views: 2949

Re: 12V Power Distribution and Monitoring Board

I sent off for a free sample of the INA199 current sensor IC. It arrived a few days back and it didn't take long to solder it into place and test it out. Here it's measuring 1.04A running through a 0.033ohm resistor via a ESP32 ADC port: current_testing_sml.jpg I am very happy with how it's turned o...
by parkview
Wed Apr 29, 2020 4:15 pm
Forum: Projects
Topic: 12V Power Distribution and Monitoring Board
Replies: 9
Views: 2949

Re: 12V Power Distribution and Monitoring Board

I found a fix for the mess of USB breakout wires. I hacked up another USB plug by cutting off some shield pins and folding out some other shield pins and found I could just solder the socket into place on the PCB footprint. While I have experimented with adding Over The Air (OTA), programming capabi...
by parkview
Sat Apr 25, 2020 9:12 pm
Forum: Projects
Topic: 12V Power Distribution and Monitoring Board
Replies: 9
Views: 2949

Re: 12V Power Distribution and Monitoring Board

Worked on the CP2102 USB to Serial circuit today. After poring over the documentation, and looking on the Internet at other peoples schematics, I noticed that the USB socket I was using was an upside down version and therefore the pinout was the reverse of what it should be. This is why my poor lapt...
by parkview
Fri Apr 24, 2020 10:37 pm
Forum: Projects
Topic: USB Breakout Board
Replies: 2
Views: 1227

Re: USB Breakout Board

I thought I could wait for the board, but I can't. An idea came to me in the shower - that I could adapt and use the USB Cable Tester PCB by cutting a few traces and adding on a 2 x 4 male 2mm pinheader block thats mounted on a sliver of Kapton tape to protect the two centre pins from the 2512 Fuse ...
by parkview
Fri Apr 24, 2020 9:02 pm
Forum: Projects
Topic: 12V Power Distribution and Monitoring Board
Replies: 9
Views: 2949

Re: 12V Power Distribution and Monitoring Board

A breakthrough! I have been having problems trying to program the ESP32. The CP2102 USB to Serial circuit isn't working. I kind of expected that, as it's the first time I have tried using the circuit. It's also the first time I have tried loading a program into the ESP32 WROOM32 by serial too. I tho...
by parkview
Mon Apr 20, 2020 11:29 am
Forum: Projects
Topic: Solder Practice Board
Replies: 1
Views: 1853

Re: Solder Practice Board

The other day Systern and I packaged up 45 soldering practice kits. We laid out 10 lots at a time:
packaging_sml.jpg
packaging_sml.jpg (95.56 KiB) Viewed 1227 times

It didn't take that long for two people to pack them all up. There are lots of components left over, but we have run out of PCB's for the moment.
Solder_Practice_kits_sml.jpg
Solder_Practice_kits_sml.jpg (79.95 KiB) Viewed 1227 times
by parkview
Sun Apr 19, 2020 4:20 pm
Forum: Projects
Topic: USB Breakout Board
Replies: 2
Views: 1227

USB Breakout Board

Been having a few USB issues with a project and thought it would be handy to have a USB breakout board. One of my PCB's uses a CP2102 USB-UART IC. When I plug it into my laptop it causes the laptop to turn off the USB port! I need to restart the laptop to get it back online. With the number of thing...
by parkview
Sat Apr 18, 2020 4:04 pm
Forum: Projects
Topic: Cat Buzzer
Replies: 3
Views: 1912

Re: Cat Buzzer

The 5V version of the PCB arrived the other day. Systern had a go at applying the solder stencil/paste and placing the components onto the board: Housing.1.jpg It works quite well: Housing.2.jpg Current draw at 5V: 17mA idle 18mA LED on 140mA Vibrating Motor on 18mA Buzzer on pretty happy with the w...
by parkview
Fri Apr 17, 2020 11:19 am
Forum: Projects
Topic: 12V Power Distribution and Monitoring Board
Replies: 9
Views: 2949

Re: 12V Power Distribution and Monitoring Board

The PCB arrived the other day. It took a total of 23 days to arrive and includes the production. Not all the parts have arrived yet. I am missing the five INA199 current sensors and the ESP32 controller. The board will run without the current sensors, so to be able to get started on the software sid...
by parkview
Sat Apr 11, 2020 9:42 am
Forum: Projects
Topic: Project: Camera-Pi
Replies: 6
Views: 1849

Re: Project: Camera-Pi

Yesterday I spent some time examining the Python Compass code, then in the afternoon I attempted to get the camera live preview up onto the LCD. I decided to learn how to run 'fbcp' in a separate thread, but after reading up on threads and trying out some code, I realised there is no Python method t...
by parkview
Fri Apr 10, 2020 2:27 pm
Forum: Projects
Topic: Project: Camera-Pi
Replies: 6
Views: 1849

Re: Project: Camera-Pi

I love writing Python Pygame interfaces for my projects. It's a very handy GUI software package. Once I had resolved the above hardware wiring issues, it didn't take long to adapt my previous Orna project code to fit this project. I even managed to create some transparent PNG image icons for my batt...