Search found 520 matches

by parkview
Thu Nov 25, 2021 9:22 pm
Forum: Projects
Topic: X27.168 Low Power Stepper Motor
Replies: 4
Views: 224

Re: X27.168 Low Power Stepper Motor

One thing I noticed playing around with ESP32 PWM channels is that they seem to effect each other. I noticed this when I set a 4KHz on channel 0 for the on board buzzer. I played a the tone, then set a 1KHz PWM frequency on channel 1. The motors move ok (now), but when I played the buzzer tone again...
by parkview
Tue Nov 23, 2021 10:25 pm
Forum: Projects
Topic: X27.168 Low Power Stepper Motor
Replies: 4
Views: 224

Re: X27.168 Low Power Stepper Motor

So my ESP32 Arduino program was using the ledcWrite() function to output 1.2KHz PWM at a 50% duty cycle. There was nothing listed in the datasheet about maximum pulse length, only the that it had to be at least 450nSec. At 1200Hz with a 50% duty cycle, my negative going pulse was something like 417u...
by parkview
Tue Nov 23, 2021 11:37 am
Forum: Projects
Topic: X27.168 Low Power Stepper Motor
Replies: 4
Views: 224

Re: X27.168 Low Power Stepper Motor

The controller PCB arrived the other day. I laser cut a paste solder stencil out and made up the PCB. It turned out rather well: controller_sml.jpg Above, I am testing out the software. My first version based on my understanding of the datasheet it didn't turn out well. It says the Max Frequency is ...
by parkview
Fri Nov 12, 2021 9:54 pm
Forum: Projects
Topic: WS2812 - Neopixel LED Strip PH 2A Connector
Replies: 1
Views: 110

Re: WS2812 - Neopixel LED Strip PH 2A Connector

The WS2812 to JST PH connector PCB arrived this week. I made a few up this afternoon. It didn't take long, as I only placed the PH connector and a 22uF SMT onto the PCB: WS2812-connector3.jpg Then a quick solder job to attach a strip of 12mm wide WS2812 RGB LEDs. To keep the LED strip in place, I he...
by parkview
Thu Oct 28, 2021 10:01 pm
Forum: Projects
Topic: X27.168 Low Power Stepper Motor
Replies: 4
Views: 224

Re: X27.168 Low Power Stepper Motor

So, with the motor mount PCB off being manufactured, it's time to ponder making a controller PCB to connect to the motor PCB's. My thinking at the moment is to have the AX1201728 IC being controlled by a cheap MCU that will be incorporated on the controller PCB. The MCU will act as an i2C slave devi...
by parkview
Thu Oct 28, 2021 9:30 pm
Forum: Projects
Topic: X27.168 Low Power Stepper Motor
Replies: 4
Views: 224

X27.168 Low Power Stepper Motor

Back in early October 2021, Stephen put me onto a rather nifty little Stepper Motor, behold the: X27.168. X27.1-front.jpg and the backside, with the two coil connectors: X27.1-back.jpg It's about 30mm across and about 9mm tall. The spindle can rotate reputably at 600 degrees/second at 5V and drawing...
by parkview
Mon Oct 25, 2021 11:54 am
Forum: Projects
Topic: WS2812 - Neopixel LED Strip PH 2A Connector
Replies: 1
Views: 110

WS2812 - Neopixel LED Strip PH 2A Connector

I love the JST PH connector. It's very versatile and compact. You can get it in surface mount SMD, or Through Hole package. It's rated for 100V, 2A. If you need more current, then there is the JST XH connector. It's rated for 250V, 3A. There are even higher rated connectors, but I haven't had a need...
by parkview
Sun Oct 24, 2021 11:48 am
Forum: General Electronics
Topic: Electronic Parts Storage
Replies: 2
Views: 402

Re: Electronic Parts Storage

Yay! It took 2 days for me to figure out how to write an edit function for my simple Parts Management Database! This is just kludged and hacked together Python code until it worked. A lot of wasted time wondering why it wasn't working as per on-line examples - until I realised that my Input fields n...
by parkview
Sat Oct 16, 2021 10:28 pm
Forum: Projects
Topic: Remote Weather Station
Replies: 1
Views: 110

Re: Remote Weather Station

While I started designing up a 10cm x 10cm cheap Beta version with some weather station sensors and a STM32L151RE MCU, I quickly hit the silicon shortage snag and found that if you can find MCUs, prices have gone through the roof. A MCU I purchased back in 2019, is now five times the price. I now ha...
by parkview
Sat Oct 16, 2021 10:01 pm
Forum: Projects
Topic: Remote Weather Station
Replies: 1
Views: 110

Remote Weather Station

What does the words: Remote Weather Station conjure up in your mind? In mine, it's a weather station way out off the main road on the Nullarbor desert. This will be a many phased project - each phase building on the previous one as I learn and experiment along the way. Something like this: Beta: jus...
by parkview
Thu Oct 07, 2021 1:54 pm
Forum: Off Topic
Topic: Visiting Four out of Five Adelaide Makerspaces
Replies: 5
Views: 398

Re: Visiting Four out of Five Adelaide Makerspaces

While not Makerspaces, I did visit the Goolwa and Victor Harbor Libraries. These both hosted 3D printers from which the public could come in and print out things they had designed or downloaded from the Internet. This is the Goolwa Library printer: Goolwa.jpg The Victor Harbor Libraries has a volunt...
by parkview
Thu Oct 07, 2021 1:48 pm
Forum: Off Topic
Topic: Visiting Four out of Five Adelaide Makerspaces
Replies: 5
Views: 398

Re: Visiting Four out of Five Adelaide Makerspaces

5: Adelaide Hills Business Centre and Makerspace Web: https://www.adelaidehillsbc.com.au/facilities/ This is one place I didn't get time to visit as it was a ways out of town. I did call the coordinator and he offered to give me a tour of the space, as it was closed to the general public due to Cov...
by parkview
Thu Oct 07, 2021 1:40 pm
Forum: Off Topic
Topic: Visiting Four out of Five Adelaide Makerspaces
Replies: 5
Views: 398

Re: Visiting Four out of Five Adelaide Makerspaces

4: Port Adelaide Enfield Library Makerspace WEB: https://www.cityofpae.sa.gov.au/explore/libraries/makerspace and https://stemlibrary.space/iot-experimenters/ I was tipped off about this Library based space while chatting with a member of the Adelaide Makerspace. I was grateful that Robert, one of t...
by parkview
Thu Oct 07, 2021 12:29 pm
Forum: Off Topic
Topic: Visiting Four out of Five Adelaide Makerspaces
Replies: 5
Views: 398

Re: Visiting Four out of Five Adelaide Makerspaces

3: Adelaide Hackerspace: Web: https://hackerspace-adelaide.org.au/ This is space specialises in Electronics and computers and is open two nights of the week. On Tuesday night 18:00-21:00 it's hosted at the Torrens Flinders University Campus - Digital Lab, and on Thursday night it's hosted at the Ad...
by parkview
Thu Oct 07, 2021 12:03 pm
Forum: Off Topic
Topic: Visiting Four out of Five Adelaide Makerspaces
Replies: 5
Views: 398

Re: Visiting Four out of Five Adelaide Makerspaces

2: SANE Makerspace Web: http://www.sanemakerspace.com/ This is a commercial Makespace, in that a few people have got together to host the space and people can pay to use the space. It is very strong on wood working and hosts three very busy laser cutters, bandsaws, planers, a lathe, drills and a fu...
by parkview
Thu Oct 07, 2021 11:57 am
Forum: Off Topic
Topic: Visiting Four out of Five Adelaide Makerspaces
Replies: 5
Views: 398

Visiting Four out of Five Adelaide Makerspaces

In August/September 2021 I spent six weeks in and around Adelaide. Before I left, I looked up all the Maker/Hacker spaces I could find with the idea I would set out to visit as many as I had spare time to stop by. 1: Adelaide Makerspace Web: https://makerspaceadelaide.org/ This is the largest of the...
by parkview
Wed Sep 08, 2021 1:15 pm
Forum: Projects
Topic: Universal e-Paper Name Badge
Replies: 2
Views: 238

Re: Universal e-Paper Name Badge

Today I upload the next PCB revision design to JLCPCB to manufacture. This will fix a couple of wiring issues and will include a MPU-6050 accelerometer, so the board will be able to rotate the text depending on which way your mounting the unit. I am also trialling a ESP32-C3 MCU. This is being bille...
by parkview
Wed Sep 08, 2021 1:03 pm
Forum: General Electronics
Topic: Exploring Ideal Diodes
Replies: 0
Views: 144

Exploring Ideal Diodes

I have used some Ideal Diode circuits in a few projects now, but have found that they leak a reverse voltage back through the Diode (MOSFET). Scouring the Internet, I have found three different designs all based around the idea of turning off a MOSFET if there is no voltage on one side of the MOSFET...
by parkview
Fri Sep 03, 2021 8:35 am
Forum: Projects
Topic: Throttle Boddy Driver
Replies: 2
Views: 166

Re: Throttle Boddy Driver

Love the GIF! How are you driving the flap position? If it's a variable resistor, or an encoder, have you looked at the values to see if there is an instability/fluctuation in the incoming data? Maybe displaying the data in the Arduino Serial plotter might help to make sure it's linear?
by parkview
Thu Aug 26, 2021 3:50 pm
Forum: Projects
Topic: Universal e-Paper Name Badge
Replies: 2
Views: 238

Re: Universal e-Paper Name Badge

The Adelaide Makerspace hosted a show and tell evening as part of the National Science week. I was luckily enough to be able to attend and display some of my PCB I have recently created. This included the current version of the e-Paper Name Badge project. I am on the road, so I have some time for so...