Category Archives: Uncategorized

Flashing Light Prize 2017 – 2

Flashing Light Prize 2017 second entry

So I had a better idea… and as far as I know there is no restrictions on entering twice.

This time, I needed some thing more impressive. I’d been tinkering with a demonstration of lighting a bulb with a single connection for a while, so I tied it in with that. Unfortunately the only (working) tesla coil that I have that has enough power (actually RMS current at the topload) is the Aetheriser. So that is the coil I had to use.

A quick test with a long filament lamp proved the idea workable, but the free connection got a bit warm (e.g. too hot to touch) so I added a brass ball protection to the free end

The large ball on the other end gives stability and stops the lamp from falling over.

The stills from the video.

and the last one of the failed cap end..

 

My other entry to Flashing Light Challenge 2017

Tales of a cheap Chinese laser cutter – External info Links

External Links that I have found useful.

Laser alignment guide (Just add Sharks but applicable to most lasers)

0xFred All sorts of good K40 tips

So I bought a cheap Chinese 40W CO2 Laser Cutter and it’s actually OK (Part 3)

Mikes Electric Stuff – Cheap Chinese Laser cutter – A really early K40 blog

40 Watt Chinese CO2 Laser Upgrade with RAMPS & Arudino

Legend of the Cheap Chinese Laser Cutter – Applied Absurdity


My experiences Tales of a Cheap Chinese Laser cutter – Pre-Checks

PIZero Tesla Coils at the RI Christmas Lectures

Earlier this month it was my great honor to be invited to demonstrate the PI zero tesla coils at the Royal institution Christmas lectures.

The Christmas lectures were a Christmas institution when I was growing up and they formed a great part of my education, especially the ones by Eric Lathwaite. This year is their 80th televised Christmas Lecture, I’m sure in that time it has inspired the lives of many many children to investigate science, and long may it continue to do so.

Behinds the scenes at the lectures was incredible, the organised chaos that was happening was untrue. There were 20+ experiments in the lecture (the first of three) and moving them in and out of the theater was a very well choreographed scientific dance.

I have every admiration to the RI and Windfall Films that produce it.

Walking in to the theater and standing where Faraday and not to forget, Tesla himself had lectured, I can’t explain the feeling. Oh, and the 350+ kids watching you… No Pressure…

The theater is incredible, it’s so much smaller than it looks on TV, add three cameras, a lecturer and 10+ support staff (dressed in black), it doesn’t leave much room for demonstrations that need a couple of meters exclusion zone for safety.

What will be featured on the lecture on Boxing day, not a clue, as is usual with any filming, its down to the final edit.

Even if I don’t make it on to the show, watch anyway well worth it for kids of all ages.

Behind the Ri Christmas Lectures- Show 01, 2016 Mark Parker – Standup Maths (warm up guy)

This Lecture is the first to go out BBC4 20:00 Boxing day 2016

The video is now available at http://richannel.org/christmas-lectures/2016/supercharged-fuelling-the-future


 

 

Details of the PiZero Tesla coils 

Talk for Derby Geekeasy 11-8-16

HV talk in the Furnace inn in derby for Derby Geekeasy @geekeasyderby

Thanks to the people at the Derby Geekeasy for a great night, plus a special thanks for the staff of the furnace inn for being very accommodating (and having excellent beer)

Videos (thanks to Glyn)

If you would like a HV or Tesla talk in the Nottingham, Derby or Leicester area, please contact me.
The Wimshurst Machine

Wimshurst – Pinpong ball particle accelerator

Wimshurst – Bottle motor

Part 2 – Tesla coils

Code to write to I2C YwRobot display from PI command

Compile with  gcc -o i2c_lcd i2c_lcd.c -l wiringPi

Usage:
i2c_lcd -i  init display
i2c_lcd -c  clear display
i2c_lcd -1:2:3:4 “text”  print text to line 1:2:3:4

[code]]czoyNTpcIiNpbmNsdWRlICZsdDtzdGRsaWIuaCZndDtcIjt7WyYqJl19[[/code] [code]]czoyNzpcIiAjaW5jbHVkZSAmbHQ7c3RkYm9vbC5oJmd0O1wiO3tbJiomXX0=[[/code] [code]]czo2OTpcIiAjaW5jbHVkZSAmbHQ7c3RkaW8uaCZndDvCoMKgIC8qIFN0YW5kYXJkIGlucHV0L291dHB1dCBkZWZpbml0aW9ucyAqL1wie1smKiZdfTt7WyYqJl19[[/code] [code]]czo2MjpcIiAjaW5jbHVkZSAmbHQ7c3RyaW5nLmgmZ3Q7wqAgLyogU3RyaW5nIGZ1bmN0aW9uIGRlZmluaXRpb25zICovXCI7e1smKiZdfQ==[[/code] [code]]czo2OTpcIiAjaW5jbHVkZSAmbHQ7dW5pc3RkLmgmZ3Q7wqAgLyogVU5JWCBzdGFuZGFyZCBmdW5jdGlvbiBkZWZpbml0aW9ucyAqL1wie1smKiZdfTt7WyYqJl19[[/code] [code]]czo2MDpcIiAjaW5jbHVkZSAmbHQ7ZmNudGwuaCZndDvCoMKgIC8qIEZpbGUgY29udHJvbCBkZWZpbml0aW9ucyAqL1wiO3tbJiomXX0=[[/code] [code]]czo2MDpcIiAjaW5jbHVkZSAmbHQ7ZXJybm8uaCZndDvCoMKgIC8qIEVycm9yIG51bWJlciBkZWZpbml0aW9ucyAqL1wiO3tbJiomXX0=[[/code] [code]]czo2ODpcIiAjaW5jbHVkZSAmbHQ7dGVybWlvcy5oJmd0OyAvKiBQT1NJWCB0ZXJtaW5hbCBjb250cm9sIGRlZmluaXRpb25zICovXCI7e1smKiZdfQ==[[/code] [code]]czoyNDpcIiAjaW5jbHVkZSAmbHQ7dGltZS5oJmd0O1wiO3tbJiomXX0=[[/code] [code]]czozMTpcImNoYXIgKiBsb2NrZmlsZT1cImkyY19sY2QubG9ja1wiO1wiO3tbJiomXX0=[[/code] [code]]czoyMjpcIiBpbnQgaTJjX2FkZHJlc3M9MHgyNztcIjt7WyYqJl19[[/code] [code]]czo4OlwiIGludCBmZDtcIjt7WyYqJl19[[/code] [code]]czoyMTpcIiBib29sIGJhY2tsaWdodD10cnVlO1wiO3tbJiomXX0=[[/code] [code]]czoxNTpcIiBpbnQgbGFzdF9kYXRhO1wiO3tbJiomXX0=[[/code] [code]]czoyMDpcInZvaWQgaW5pdF9sY2Qodm9pZCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyNjpcIiB2b2lkIEkyQ1dyaXRlRGlyZWN0KGludCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyODpcIiB2b2lkIEkyQ1dyaXRlRGlyZWN0QmwoaW50KTtcIjt7WyYqJl19[[/code] [code]]czoyMzpcIiB2b2lkIGxjZF9zdHJvYmUodm9pZCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyMTpcIiB2b2lkIGxjZF93cml0ZShpbnQpO1wiO3tbJiomXX0=[[/code] [code]]czoyOTpcIiB2b2lkIGxjZF9wdXRzKGNoYXIgKiwgaW50ICk7XCI7e1smKiZdfQ==[[/code] [code]]czoyMzpcIiB2b2lkIHRlc3Rfd3JpdGUodm9pZCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyNjpcIiB2b2lkIGxjZF93cml0ZV9jaGFyKGludCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyMjpcIiB2b2lkIGxjZF9jbGVhcih2b2lkKTtcIjt7WyYqJl19[[/code] [code]]czoyNjpcIiB2b2lkIGxjZF9jdXJzb3JvZmYodm9pZCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyMjpcIiB2b2lkIGNoZWNrbG9jayh2b2lkKTtcIjt7WyYqJl19[[/code] [code]]czoyMjpcIiB2b2lkIGNsZWFybG9jayh2b2lkKTtcIjt7WyYqJl19[[/code] [code]]czoyNDpcIiB2b2lkIEFsbExpbmVzKGNoYXIgKiApO1wiO3tbJiomXX0=[[/code] [code]]czozNDpcInZvaWQgbWFpbihpbnQgYXJnYywgY2hhciAqYXJndltdKXtcIjt7WyYqJl19[[/code] [code]]czoxNzpcIiB3aXJpbmdQaVNldHVwKCk7XCI7e1smKiZdfQ==[[/code] [code]]czo0ODpcIiBpZiAoZmFsc2U9PShmZD13aXJpbmdQaUkyQ1NldHVwKGkyY19hZGRyZXNzKSkpe1wiO3tbJiomXX0=[[/code] [code]]czo1OTpcIiBmcHJpbnRmKHN0ZGVycixcIkNhblwndCBvcGVuIGkyYyBvbiBwb3J0ICVpXFxuXCIsaTJjX2FkZHJlc3MpO1wiO3tbJiomXX0=[[/code] [code]]czo4OlwiZXhpdCgxKTtcIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoxMzpcImlmIChhcmdjPT0xKXtcIjt7WyYqJl19[[/code] [code]]czoyMDpcIiBwcmludGYoXCJVc2FnZTpcXG5cIik7XCI7e1smKiZdfQ==[[/code] [code]]czozOTpcIiBwcmludGYoXCJpMmNfbGNkIC1pwqAgaW5pdCBkaXNwbGF5XFxuXCIpO1wiO3tbJiomXX0=[[/code] [code]]czo0MDpcIiBwcmludGYoXCJpMmNfbGNkIC1jwqAgY2xlYXIgZGlzcGxheVxcblwiKTtcIjt7WyYqJl19[[/code] [code]]czo2ODpcIiBwcmludGYoXCJpMmNfbGNkIC0xOjI6Mzo0IFxcXCJ0ZXh0XFxcIsKgIHByaW50IHRleHQgdG8gbGluZSAxOjI6Mzo0XFxuXCIpO1wiO3tbJiomXX0=[[/code] [code]]czoxNDpcIiBwcmludGYoXCJcXG5cIik7XCI7e1smKiZdfQ==[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czo2OlwiaW50IGk7XCI7e1smKiZdfQ==[[/code] [code]]czo2NzpcIiBmb3IgKGkgPSAxOyBpICZsdDsgYXJnYzsgaSsrKcKgIC8qIFNraXAgYXJndlswXSAocHJvZ3JhbSBuYW1lKS4gKi9cIjt7WyYqJl19[[/code] [code]]czoyOlwiIHtcIjt7WyYqJl19[[/code] [code]]czo2ODpcIiBpZiAoc3RyY21wKGFyZ3ZbaV0sIFwiLWlcIikgPT0gMCnCoCAvKiBQcm9jZXNzIG9wdGlvbmFsIGFyZ3VtZW50cy4gKi9cIjt7WyYqJl19[[/code] [code]]czoyOlwiIHtcIjt7WyYqJl19[[/code] [code]]czoxMjpcIiBpbml0X2xjZCgpO1wiO3tbJiomXX0=[[/code] [code]]czoxNzpcIiBsY2RfY3Vyc29yb2ZmKCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czo2ODpcIiBpZiAoc3RyY21wKGFyZ3ZbaV0sIFwiLTFcIikgPT0gMCnCoCAvKiBQcm9jZXNzIG9wdGlvbmFsIGFyZ3VtZW50cy4gKi9cIjt7WyYqJl19[[/code] [code]]czoyOlwiIHtcIjt7WyYqJl19[[/code] [code]]czoxMzpcIiBjaGVja2xvY2soKTtcIjt7WyYqJl19[[/code] [code]]czoyMzpcIiBsY2RfcHV0cyhhcmd2W2krMV0sMSk7XCI7e1smKiZdfQ==[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czo2ODpcIiBpZiAoc3RyY21wKGFyZ3ZbaV0sIFwiLTJcIikgPT0gMCnCoCAvKiBQcm9jZXNzIG9wdGlvbmFsIGFyZ3VtZW50cy4gKi9cIjt7WyYqJl19[[/code] [code]]czoyOlwiIHtcIjt7WyYqJl19[[/code] [code]]czoxMzpcIiBjaGVja2xvY2soKTtcIjt7WyYqJl19[[/code] [code]]czoyMzpcIiBsY2RfcHV0cyhhcmd2W2krMV0sMik7XCI7e1smKiZdfQ==[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czo2ODpcIiBpZiAoc3RyY21wKGFyZ3ZbaV0sIFwiLTNcIikgPT0gMCnCoCAvKiBQcm9jZXNzIG9wdGlvbmFsIGFyZ3VtZW50cy4gKi9cIjt7WyYqJl19[[/code] [code]]czoyOlwiIHtcIjt7WyYqJl19[[/code] [code]]czoxMzpcIiBjaGVja2xvY2soKTtcIjt7WyYqJl19[[/code] [code]]czoyMzpcIiBsY2RfcHV0cyhhcmd2W2krMV0sMyk7XCI7e1smKiZdfQ==[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czo2ODpcIiBpZiAoc3RyY21wKGFyZ3ZbaV0sIFwiLTRcIikgPT0gMCnCoCAvKiBQcm9jZXNzIG9wdGlvbmFsIGFyZ3VtZW50cy4gKi9cIjt7WyYqJl19[[/code] [code]]czoyOlwiIHtcIjt7WyYqJl19[[/code] [code]]czoxMzpcIiBjaGVja2xvY2soKTtcIjt7WyYqJl19[[/code] [code]]czoyMzpcIiBsY2RfcHV0cyhhcmd2W2krMV0sNCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czo2ODpcIiBpZiAoc3RyY21wKGFyZ3ZbaV0sIFwiLWNcIikgPT0gMCnCoCAvKiBQcm9jZXNzIG9wdGlvbmFsIGFyZ3VtZW50cy4gKi9cIjt7WyYqJl19[[/code] [code]]czoyOlwiIHtcIjt7WyYqJl19[[/code] [code]]czoxMzpcIiBjaGVja2xvY2soKTtcIjt7WyYqJl19[[/code] [code]]czoxMzpcIiBsY2RfY2xlYXIoKTtcIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czo2ODpcIiBpZiAoc3RyY21wKGFyZ3ZbaV0sIFwiLWZcIikgPT0gMCnCoCAvKiBQcm9jZXNzIG9wdGlvbmFsIGFyZ3VtZW50cy4gKi9cIjt7WyYqJl19[[/code] [code]]czoyOlwiIHtcIjt7WyYqJl19[[/code] [code]]czoxMzpcIiBjaGVja2xvY2soKTtcIjt7WyYqJl19[[/code] [code]]czoyMTpcIiBBbGxMaW5lcyhhcmd2W2krMV0pO1wiO3tbJiomXX0=[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoxOlwifVwiO3tbJiomXX0=[[/code] [code]]czoxMjpcImNsZWFybG9jaygpO1wiO3tbJiomXX0=[[/code] [code]]czoxODpcIi8vwqDCoCBpbml0X2xjZCgpO1wiO3tbJiomXX0=[[/code] [code]]czoyMDpcIiAvL8KgwqAgbGNkX2NsZWFyKCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyMTpcIiAvL8KgwqAgdGVzdF93cml0ZSgpO1wiO3tbJiomXX0=[[/code] [code]]czozNjpcIiAvL8KgwqDCoCBsY2RfcHV0cyhcInRlc3Qgc3RyaW5nXCIsMyk7XCI7e1smKiZdfQ==[[/code] [code]]czozNDpcIiAvL8KgwqDCoCBsY2RfcHV0cyhcIkxhc3QgbGluZVwiLDQpO1wiO3tbJiomXX0=[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoyMTpcInZvaWQgY2hlY2tsb2NrKHZvaWQpe1wiO3tbJiomXX0=[[/code] [code]]czozOTpcIiBpZiggYWNjZXNzKCBsb2NrZmlsZSwgRl9PSyApICE9IC0xICkge1wiO3tbJiomXX0=[[/code] [code]]czoyNTpcIiBwcmludGYoXCJMb2NrIEV4aXN0c1xcblwiKTtcIjt7WyYqJl19[[/code] [code]]czo1NTpcIiB3aGlsZShhY2Nlc3MoIGxvY2tmaWxlLCBGX09LICkgIT0gLTEgKXt1c2xlZXAoMTAwMDApO31cIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czozNTpcIiBGSUxFICpmcCA9IGZvcGVuKGxvY2tmaWxlLCBcImFiK1wiKTtcIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoyMTpcInZvaWQgY2xlYXJsb2NrKHZvaWQpe1wiO3tbJiomXX0=[[/code] [code]]czozOTpcIiBpZiggYWNjZXNzKCBsb2NrZmlsZSwgRl9PSyApICE9IC0xICkge1wiO3tbJiomXX0=[[/code] [code]]czoxODpcIiB1bmxpbmsobG9ja2ZpbGUpO1wiO3tbJiomXX0=[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czozMTpcInZvaWQgSTJDV3JpdGVEaXJlY3REKGludCBkYXRhKXtcIjt7WyYqJl19[[/code] [code]]czoyMjpcIiBkYXRhPWRhdGEgJmFtcDsgMHhGRjtcIjt7WyYqJl19[[/code] [code]]czoyMjpcIiBJMkNXcml0ZURpcmVjdChkYXRhKTtcIjt7WyYqJl19[[/code] [code]]czoxNjpcIiBsYXN0X2RhdGE9ZGF0YTtcIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czozMDpcInZvaWQgSTJDV3JpdGVEaXJlY3QoaW50IGRhdGEpe1wiO3tbJiomXX0=[[/code] [code]]czoyMjpcIiBkYXRhPWRhdGEgJmFtcDsgMHhGRjtcIjt7WyYqJl19[[/code] [code]]czoxNjpcIiBpZiAoYmFja2xpZ2h0KXtcIjt7WyYqJl19[[/code] [code]]czozNDpcIiB3aXJpbmdQaUkyQ1dyaXRlKGZkLGRhdGEgfCAweDA4KTtcIjt7WyYqJl19[[/code] [code]]czo3OlwiIH1lbHNle1wiO3tbJiomXX0=[[/code] [code]]czoyNzpcIiB3aXJpbmdQaUkyQ1dyaXRlKGZkLGRhdGEpO1wiO3tbJiomXX0=[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoyMjpcInZvaWQgbGNkX3N0cm9iZSh2b2lkKXtcIjt7WyYqJl19[[/code] [code]]czoxMzpcIiB1c2xlZXAoNDAwKTtcIjt7WyYqJl19[[/code] [code]]czozNjpcIiBJMkNXcml0ZURpcmVjdCgobGFzdF9kYXRhIHwgMHgwNCkpO1wiO3tbJiomXX0=[[/code] [code]]czoxMzpcIiB1c2xlZXAoNDAwKTtcIjt7WyYqJl19[[/code] [code]]czozMDpcIiBJMkNXcml0ZURpcmVjdCgobGFzdF9kYXRhICkpO1wiO3tbJiomXX0=[[/code] [code]]czoyMDpcIiAvL8KgwqAgdXNsZWVwKDQwMCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoyNTpcInZvaWQgbGNkX3dyaXRlKGludCBkYXRhKXtcIjt7WyYqJl19[[/code] [code]]czo0NTpcIiBJMkNXcml0ZURpcmVjdEQoKGRhdGEgJmd0OyZndDsgNCkmbHQ7Jmx0OzQpO1wiO3tbJiomXX0=[[/code] [code]]czoxNDpcIiBsY2Rfc3Ryb2JlKCk7XCI7e1smKiZdfQ==[[/code] [code]]czo0NTpcIiBJMkNXcml0ZURpcmVjdEQoKGRhdGEgJmFtcDsgMHgwRikmbHQ7Jmx0OzQpO1wiO3tbJiomXX0=[[/code] [code]]czoxNDpcIiBsY2Rfc3Ryb2JlKCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czozMDpcInZvaWQgbGNkX3dyaXRlX2NoYXIoaW50IGRhdGEpe1wiO3tbJiomXX0=[[/code] [code]]czo1NDpcIiBJMkNXcml0ZURpcmVjdEQoKChkYXRhICZndDsmZ3Q7IDQpJmx0OyZsdDs0KSB8IDB4MDEpO1wiO3tbJiomXX0=[[/code] [code]]czoxNDpcIiBsY2Rfc3Ryb2JlKCk7XCI7e1smKiZdfQ==[[/code] [code]]czo1NDpcIiBJMkNXcml0ZURpcmVjdEQoKChkYXRhICZhbXA7IDB4MEYpJmx0OyZsdDs0KSB8IDB4MDEpO1wiO3tbJiomXX0=[[/code] [code]]czoxNDpcIiBsY2Rfc3Ryb2JlKCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoxODpcInZvaWQgdGVzdF93cml0ZSgpe1wiO3tbJiomXX0=[[/code] [code]]czoxNzpcIiBsY2Rfd3JpdGUoMHhDMCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyMTpcIiBsY2Rfd3JpdGVfY2hhcihcJ1RcJyk7XCI7e1smKiZdfQ==[[/code] [code]]czoyMTpcIiBsY2Rfd3JpdGVfY2hhcihcJ0VcJyk7XCI7e1smKiZdfQ==[[/code] [code]]czoyMTpcIiBsY2Rfd3JpdGVfY2hhcihcJ1NcJyk7XCI7e1smKiZdfQ==[[/code] [code]]czoyMTpcIiBsY2Rfd3JpdGVfY2hhcihcJ1RcJyk7XCI7e1smKiZdfQ==[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoyMDpcInZvaWQgaW5pdF9sY2Qodm9pZCl7XCI7e1smKiZdfQ==[[/code] [code]]czoyNDpcIiAvKsKgwqAgUG9ydCBkZWZpbml0aW9uc1wiO3tbJiomXX0=[[/code] [code]]czozOTpcIiBhZGRyLCBibCxzdHJvYmUscncscnMswqDCoCBkNCxkNSxkNixkN1wiO3tbJiomXX0=[[/code] [code]]czo0MjpcIiAweDI3LCAzLCAywqDCoMKgwqAgLCAxLCAwLMKgwqAgNCwgNSwgNiwgN1wiO3tbJiomXX0=[[/code] [code]]czozOlwiICovXCI7e1smKiZdfQ==[[/code] [code]]czoxNzpcIiAvL3NldCA0IGJpdCBtb2RlXCI7e1smKiZdfQ==[[/code] [code]]czozMTpcIiBJMkNXcml0ZURpcmVjdEQoMHgzMCk7IC8vd3JpdGVcIjt7WyYqJl19[[/code] [code]]czoxNDpcIiBsY2Rfc3Ryb2JlKCk7XCI7e1smKiZdfQ==[[/code] [code]]czoxNDpcIiB1c2xlZXAoNTAwMCk7XCI7e1smKiZdfQ==[[/code] [code]]czoxNDpcIiBsY2Rfc3Ryb2JlKCk7XCI7e1smKiZdfQ==[[/code] [code]]czoxNDpcIiB1c2xlZXAoNTAwMCk7XCI7e1smKiZdfQ==[[/code] [code]]czoxNDpcIiBsY2Rfc3Ryb2JlKCk7XCI7e1smKiZdfQ==[[/code] [code]]czoxNDpcIiB1c2xlZXAoNTAwMCk7XCI7e1smKiZdfQ==[[/code] [code]]czoyMzpcIiBJMkNXcml0ZURpcmVjdEQoMHgyMCk7XCI7e1smKiZdfQ==[[/code] [code]]czoxNDpcIiBsY2Rfc3Ryb2JlKCk7XCI7e1smKiZdfQ==[[/code] [code]]czoxNDpcIiB1c2xlZXAoNTAwMCk7XCI7e1smKiZdfQ==[[/code] [code]]czoxNjpcImxjZF93cml0ZSgweDI4KTtcIjt7WyYqJl19[[/code] [code]]czoxNzpcIiBsY2Rfd3JpdGUoMHgwOCk7XCI7e1smKiZdfQ==[[/code] [code]]czoxNzpcIiBsY2Rfd3JpdGUoMHgwMSk7XCI7e1smKiZdfQ==[[/code] [code]]czoxNzpcIiBsY2Rfd3JpdGUoMHgwNik7XCI7e1smKiZdfQ==[[/code] [code]]czoxNzpcIiBsY2Rfd3JpdGUoMHgwQyk7XCI7e1smKiZdfQ==[[/code] [code]]czoxNzpcIiBsY2Rfd3JpdGUoMHgwRik7XCI7e1smKiZdfQ==[[/code] [code]]czoxOlwifVwiO3tbJiomXX0=[[/code] [code]]czoyMjpcIi8vIHB1dCBzdHJpbmcgZnVuY3Rpb25cIjt7WyYqJl19[[/code] [code]]czo0MjpcIiB2b2lkIGxjZF9wdXRzKGNoYXIgKiBzdHJpbmdpbiwgaW50IGxpbmUpe1wiO3tbJiomXX0=[[/code] [code]]czozNDpcIiBpZiAobGluZSA9PSAxKXtsY2Rfd3JpdGUoMHg4MCk7IH1cIjt7WyYqJl19[[/code] [code]]czozMzpcIiBpZiAobGluZSA9PSAyKXtsY2Rfd3JpdGUoMHhDMCk7fVwiO3tbJiomXX0=[[/code] [code]]czozMzpcIiBpZiAobGluZSA9PSAzKXtsY2Rfd3JpdGUoMHg5NCk7fVwiO3tbJiomXX0=[[/code] [code]]czozMzpcIiBpZiAobGluZSA9PSA0KXtsY2Rfd3JpdGUoMHhENCk7fVwiO3tbJiomXX0=[[/code] [code]]czoxNjpcImNoYXIgYnVmZmVyWzIyXTtcIjt7WyYqJl19[[/code] [code]]czo5OlwiIGludCBhPTA7XCI7e1smKiZdfQ==[[/code] [code]]czozNzpcIiBmb3IoYT0wO2EmbHQ7MjA7YSsrKXtidWZmZXJbYV09XCcgXCc7fVwiO3tbJiomXX0=[[/code] [code]]czo0OlwiYT0wO1wiO3tbJiomXX0=[[/code] [code]]czoxNDpcIiBib29sIG9rPXRydWU7XCI7e1smKiZdfQ==[[/code] [code]]czoxMTpcIiB3aGlsZShvayl7XCI7e1smKiZdfQ==[[/code] [code]]czoyMDpcIiBpZihzdHJpbmdpblthXSE9MCl7XCI7e1smKiZdfQ==[[/code] [code]]czoyMzpcIiBidWZmZXJbYV09c3RyaW5naW5bYV07XCI7e1smKiZdfQ==[[/code] [code]]czo1OlwiIGErKztcIjt7WyYqJl19[[/code] [code]]czoyNDpcIiBpZiAoYSZndDsxOSl7b2s9ZmFsc2U7fVwiO3tbJiomXX0=[[/code] [code]]czo3OlwiIH1lbHNle1wiO3tbJiomXX0=[[/code] [code]]czoxMDpcIiBvaz1mYWxzZTtcIjt7WyYqJl19[[/code] [code]]czoxMzpcIiBidWZmZXJbYV09MDtcIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoxMzpcIiBidWZmZXJbYV09MDtcIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czo0MjpcIi8vwqAgcHJpbnRmKFwiQnVmZmVyICVpOiVzXFxuXCIsbGluZSxidWZmZXIpO1wiO3tbJiomXX0=[[/code] [code]]czoyNzpcIi8vwqAgZm9yIChhPTA7YSZsdDsyMDthKyspe1wiO3tbJiomXX0=[[/code] [code]]czozNjpcIiAvL8KgwqDCoCBsY2Rfd3JpdGVfY2hhcihidWZmZXJbYV0pO1wiO3tbJiomXX0=[[/code] [code]]czo3OlwiIC8vwqAgfVwiO3tbJiomXX0=[[/code] [code]]czo1OlwiIGE9MDtcIjt7WyYqJl19[[/code] [code]]czo0MTpcIiB3aGlsZSgoYSZsdDsyMCkgJmFtcDsmYW1wOyAoYnVmZmVyW2FdKSl7XCI7e1smKiZdfQ==[[/code] [code]]czoyOTpcIiBsY2Rfd3JpdGVfY2hhcihidWZmZXJbYSsrXSk7XCI7e1smKiZdfQ==[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoyODpcIi8vIGNsZWFyIGxjZCBhbmQgc2V0IHRvIGhvbWVcIjt7WyYqJl19[[/code] [code]]czoyMjpcIiB2b2lkIGxjZF9jbGVhcih2b2lkKXtcIjt7WyYqJl19[[/code] [code]]czoxNjpcIiBsY2Rfd3JpdGUoMHgxKTtcIjt7WyYqJl19[[/code] [code]]czoxNjpcIiBsY2Rfd3JpdGUoMHgyKTtcIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoyNTpcInZvaWQgbGNkX2N1cnNvcm9mZih2b2lkKXtcIjt7WyYqJl19[[/code] [code]]czo0MDpcIiBsY2Rfd3JpdGUoMHgwYyk7IC8vY3Vyc29yIGFuZCBibGluayBvZmZcIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czozMTpcInZvaWQgQWxsTGluZXMoY2hhciAqIGZpbGVuYW1lKXtcIjt7WyYqJl19[[/code] [code]]czoxMDpcIkZJTEUgKiBmcDtcIjt7WyYqJl19[[/code] [code]]czoyMDpcIiBjaGFyICogbGluZSA9IE5VTEw7XCI7e1smKiZdfQ==[[/code] [code]]czoxNjpcIiBzaXplX3QgbGVuID0gMDtcIjt7WyYqJl19[[/code] [code]]czoxNDpcIiBzc2l6ZV90IHJlYWQ7XCI7e1smKiZdfQ==[[/code] [code]]czoyNjpcImZwID0gZm9wZW4oZmlsZW5hbWUsIFwiclwiKTtcIjt7WyYqJl19[[/code] [code]]czoxODpcIiBpZiAoZnAgPT0gTlVMTCkge1wiO3tbJiomXX0=[[/code] [code]]czo0MzpcIiBmcHJpbnRmKHN0ZGVycixcIkNhbnQgb3BlbSAlc1xcblwiLGZpbGVuYW1lKTtcIjt7WyYqJl19[[/code] [code]]czoyMDpcIiBleGl0KEVYSVRfRkFJTFVSRSk7XCI7e1smKiZdfQ==[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czo4OlwiaW50IGw9MDtcIjt7WyYqJl19[[/code] [code]]czo3ODpcIiB3aGlsZSAoKChyZWFkID0gZ2V0bGluZSgmYW1wO2xpbmUsICZhbXA7bGVuLCBmcCkpICE9IC0xKSAmYW1wOyZhbXA7IGx7WyYqJl19Jmx0OzQpIHtcIjt7WyYqJl19[[/code] [code]]czo4OlwiaW50IGE9MDtcIjt7WyYqJl19[[/code] [code]]czoyMzpcIiBmb3IoYT0wO2EmbHQ7bGVuO2ErKyl7XCI7e1smKiZdfQ==[[/code] [code]]czoxNzpcIiBpZiAobGluZVthXSE9MCl7XCI7e1smKiZdfQ==[[/code] [code]]czozMjpcIiBpZiAobGluZVthXSZsdDtcJyBcJyl7bGluZVthXT0wO31cIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czo0OlwibCsrO1wiO3tbJiomXX0=[[/code] [code]]czoxODpcIiBsY2RfcHV0cyhsaW5lLGwpO1wiO3tbJiomXX0=[[/code] [code]]czoyOlwiIH1cIjt7WyYqJl19[[/code] [code]]czoxOlwifVwiO3tbJiomXX0=[[/code]

 

 

 

Morse code test oscillator

Simple Morse code test oscillator for Morse practice – A Simple (& cheap) soldering project

 

I designed this for a Scout group as a simple soldering project Electronics Badge and as part of the Communication Badge.

With care the parts can be sourced for under £2.50 each.

20160427_172802 20160427_172810 20160427_172820 20160427_172754

The boards can be ordered from OSH Park and cost £2.20 for 3
Order from OSH Park

MT MT2

Circuit

morse

BOM

1 x 3mm Led
1 x 1K(or 300R)
1 x Sounder (10 mm pitch) max diameter of 12mm
1 x CR2032 vertical battery holder
1 x CR2032/LR2032 battery
1 x Push button 5mm pitch x 7.5mm pitch

Some Electronic expertise needed, and of course a good soldering teacher.

This project uses Lithium Button batteries, please note the warnings here – Do Not short out the batteries, and Do Not swallow them.

Morse Code
315px-International_Morse_Code.svg

Morse Code decoding “tree”

Morse-code-tree

ALSO

If you wire two boards together (wire the two sounders together with a long bell-wire cable, be careful to get them both the same way around) you can make a telegraph system with a button and sounder at each end. Then you can practice sending and receiving for real….

CONSTRUCTION

Construction details are here

 

 

Lichtenburg figure test

Test of transformer choice and wood type for reliable Lichtenberg figures.

Obit – 20Kv 20mA

Both pieces of wood lightly soaked in water (only) just before test.

wood – 4mm MDF

20160420_190448 20160420_190445

Wood length 18″ – each pattern ~6″ across.

 

Course grained 3 ply

20160420_192526 20160420_192530

Burns only continued in line with the grain. Test abandoned.

 

Strontium breakouts

A test of breakout points made almost entirely of Strontium. The idea is that rather than containing the Strontium in a tube that needs to withstand the heat of an arc, we make a breakout with as much Strontium as possible. Of course Strontium is quite a good insulator so we need to add in a conductive component and something to hold it all together. This test uses PVC glue as the binder and bear conductive ink as the conductor.

tmp_24485-20160117_1901352034523555tmp_24485-20160117_1857471367784658tmp_24485-20160117_185517775580088tmp_24485-20160117_185414-1425974767

Initial tests on a large rotary classic tesla coil

DSC_1015DSC_1013DSC_1005DSC_1263_NEF_embedded

 

Some effect, but not as strong as Id hoped. Although the one on the chicken stick wasn’t bad.

SSTC 1Kw Much better results.

 

DSC_1097 DSC_1109 DSC_1111 DSC_1116

A great improvement on any other methods that I have used, and better still, the breakouts seem to be quite resilient and can be used multiple times.

Time to try other mixes 🙂

 

 

 

 

 

 

 

High speed I2C on PI Zero

After playing with the I2C bus on the Pi Zero I found that I was unable to change the baudrate with either of the commands

[code]]czozNjpcIm1vZHByb2JlIGkyY19iY20yNzA4IGJhdWRyYXRlPTIwMDAwMFwiO3tbJiomXX0=[[/code]

or

gpio load i2c 2000

Apparently you now need to set the I2C speed in /boot/config.txt

Mine now reads:

dtparam=i2c_arm=on
dtparam=i2c1=on
dtparam=i2c1_baudrate=500000

Of course it does need a reboot to change.

Strangely dtparam=i2c1_baudrate=1000000

won’t work, but that may be due to my receiver and not the PI