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David Watts
Works at De Montfort University
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David Watts

commented on a video on YouTube.
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Great job mate, I enjoyed the more detailed video. Are there any commercial units you can test the readings against? Skulled!
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David Watts

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Thanks, I have been looking for a new iron and this looks like it might fit. Also a big fan of flux pens. I like the outakes ;-) Pretty much like every video I every do.
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David Watts

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David Watts

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I like the laid back approach, it was kinda accidentally funny but intentionally informative.
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David Watts

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Really nice looking unit, was that earth terminal connected to the case?

I just picked up a Muirhead B-21-F decade condenser, lovely piece of kit but not much to see inside as it is mostly enclosed.
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+Scullcom Hobby Electronics I thought it was a bit odd, my Muirhead has an earth terminal with a wooden box and I couldn't figure out why. I will throw up a video of it next week.

I am really impressed with your GPS video, pretty much the neatest whiteboard drawing ever! I am hoping to get a high altitude balloon project 'off the ground' soon so I found that really useful.

Subbed ;-)
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David Watts

Tutorials  - 
 
Finally got some very reliable results with the ESP8266 WiFi module (Flashed for 9600bps) and the Arduino UNO. I have put up a video and code if anyone is interested, you can even use the PHP page in my code to pull the current time if it doesn't get spammed too much. My example just grabs current UK time and sends an integer value to my server. Nothing more has been implemented yet but I would like to knock up my own library, I realise some already exist but it is a good learning experience. 

Happy to answer questions if anyone has any.

*Level shifting the RX and TX lines to 3.3v is advisable, I have not found it necessary but do so at your own risk*
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Gianluca Maccari's profile photoLoral Godfrey's profile photoLeo Schakel's profile photoFritz Bischof's profile photo
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+albert van wessel The screen is sort of an extra, you also get the same messages on the hardware serial output. 
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David Watts

Help & Support  - 
 
Anyone know a good way to receive about 300 bytes across serial and save it into a char array? I can only seem to get 64 characters (the serial buffer size). I am sure someone must have done it before.
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Thanks +Peter Scargill +Hari Wiguna +james wolf it seems I was doing it right all along, well my serial code at least. A long forgotten delay left in the loop was causing the buffer to overrun or otherwise misbehave. All sorted now.

I was developing some ESP8266 related code for finding Wifi networks.
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David Watts

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This is a little controversial in this communit,y but this is the new Arduino Zero Pro from Arduino SRL. The hardware is the same as the Zero being released soon by Arduino LLC.

I view this board as a clone for now and since I own a lot of clones, I have no problem with it. I just wish all the trademarks would get sorted out to save confusion. I am team neither.
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+James A. Langbridge The current IDE from Arduino.org doesn't support everything yet and lots or libraries won't have support for the chip yet. It took a long time for Due support on lots of libraries, which I is why I opted for a simple LED base demo. I look forward to the Arduino.cc version of the software.
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David Watts

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I was wondering at the start how you would deal with the accuracy of resistors (1-0.1% can be quite a big deal) and the 10 micro amps, great solution. Also, I am pretty darn jealous of your workshop.

Really enjoyed the presentation style and detail.
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Scullcom Hobby Electronics's profile photo
 
+David Watts Thanks David. I found that if you use all the same type of resistors then the tolerance is not critical as they drift by the same factor. The 100 ohm sense resistor I used to calibrate the unit is more critical but using a good quality 0.1% one works fine (alternatively you could use a 0.01% one but they are very expensive and this may be overkill for the hobbyist). Also use good quality resistor presets. With the resistor types I have used in the project the unit is accurate on both its 1mA and 10mA settings to at least 2 or 3 decimal places giving an accuracy of ±0.1% or better.
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David Watts

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+albert van wessel The code is in the video description on youtube and the schematic/circuit diagram is 1 minute and 15 seconds into the video.
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