Mailbag Monday 186

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It's Monday and I've got more mail.
Electronics, parts, kits and surprises!
Grab yourself a beverage and let's get into it!
Links:
NEW B0505S-1W DC-DC module power module isolation module SIP-4
pileofstuff.ca/r/ypnov
Voice Playback Module DY-SV17F XY-V17B MP3 Voice Module WAV Decoding IO Trigger
pileofstuff.ca/r/g0x8l
Magic Eye 6E2 EM87 6UH6 EM84 Tube Audio Indicator LOW Level Input DIY Kit
pileofstuff.ca/r/ml2uo (search link)
11-Digit Desktop Calculator Electronic Production DIY Kit LCD1062/digital tube
pileofstuff.ca/r/qyfhv
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#ElectronicsCreators
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This isn't the only way to do it.
It's probably not the best way to do it.
But it's how I did it.

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18 фев 2024

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Комментарии : 50

@englishrupe01 4 месяца назад

Your mailbag episodes are always cool and interesting. Many thanks.

@michaelwolak3098 4 месяца назад

That calculator kit is brilliant I have built it, very simple and it is a 4 band or 5 band resistor calculator as well as other functions

@rjpete66 4 месяца назад

If you haven't seen them, there are small modules that convert 12vdc to adjustable high voltage. I think they are usually marketed as nixie tube power modules. Add in an adjustable buck module to bring the 12vdc down to 6.3 volts for the heater and you could power it all from a single 12vdc adapter.

@GnuReligion 4 месяца назад

If you have something like a bluetooth receiver on the same power supply as some little amp/speaker system -- the 0505 can keep that nasty RF (common mode?) noise out. A big calculator with cherry keys, that doubles as a PC numeric keypad would be nice. Build kits until your back hurts!

@RobertoColi 4 месяца назад

Hi, the most interesting kit is the calculator. I though it would have an ultra rare LCD display (I mean the golden/black display found on the old Toshiba or Chinese calculators) but when you unboxed the LCD it seems a normal Arduino LCD display. The question is : how can a 3V battery coin power that LCD display ? 🤔 I imagine that with the battery it will last 3 minutes.... The instruction page seems to say NEVER plug the external power with the battery coin inserted (but I am sure 100% people will have plugged the external cable without removing the coin cell destroying everything... 😂) If you assemble this kit, let us know how much it works with the 3V coin battery 😉

@darrenchapman7203 4 месяца назад

Also, a long time ago, 1985, I built a valve amp and used several small power transformers to get the HV , one transformer was 3A multi tap that supplied 6V filament voltage, the same transformer supplied 12v to a scavenged clock radio power Transformers secondary winding and gave me a low current 240v output. A bridge rectifier and some suitable capacitors and I was up and running, It wouldn't have won any prizes, but it worked , I was able to adjust the voltage by selecting different tapping points.

@pileofstuff 4 месяца назад

I've worked with similar multi-tap transformers in the past as well. Unfortunately, these days those are ridiculously expensive.

@makeitwork7522 4 месяца назад

Talking about kits , I haven't seen a clock kit in your mailbag videos. I've watched all the mailbag videos (twice). A clock is what everybody needs (and uses)............

@pileofstuff 4 месяца назад

I did actually get a clock kit. It's in the queue for later this year. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-C3KVzU3DP0U.html

@Shmbler 4 месяца назад

Those isolated DC-DC's are a nice way to isolate bluetooth audio modules from amplifiers. Removes the nasty noise created by the module when it's differential outputs are referenced to power supply GND.

@SidneyCritic 4 месяца назад

They love putting Canadian tourist ads on this channel - lol -. I bought a AE boost module/circuit that is something like 12V to 600V, and I think it can go as low 170V.

@snakezdewiggle6084 4 месяца назад

Cool haul.! A buddy and me bult 6 of those tube amps, no joy. We spent months working on them, trading ideas over the radio, talking with department heads at uni. They're in the parts bin now. Can't wait to see how yours works out.

@MothKeeper 4 месяца назад

I isolate my grounds so when I'm out walking the pesky wife can't find me... more pub time.

@sparkyprojects 4 месяца назад

I have a similar mp3 player, glad you found reference to file naming being numerical, if it worls like mine, you can play midi files as in .mid, but not a midi input as such I also have a tube display, it's a short bar at each end that closes on the peaks, except mine is stereo, you may need a pre amp depending on what the circuit is. I got a second hand radio transformer with the high voltage and 6.3v windings from ebay If the transformer has a 240v winding, a half wave retifier would be suitable with a good smoothing cap.

@uni-byte 4 месяца назад

I just did a build of that calculator on my channel. Nice build and it works well too. Needs a battery upgrade though. Video 0153. It has a good HEX Decimal conversion.

@ElmerFuddGun 4 месяца назад

I just watched your calculator build video. Too bad it doesn't have a plug in for DC power. And it was weird that you couldn't get the square root of the number already on the display.

@uni-byte 4 месяца назад

@@ElmerFuddGun Thanks for watching. Yeah, It's no HP 41C and it does leave a lot to be desired, but it's still a nice kit build. I have mine at the ready and really only use it for HEX to decimal conversions which it does fairly well. I do plan to put a rechargeable lithium ion battery in it and a BMS module. Just to do it..

@frankowalker4662 4 месяца назад

If that calculator is the same as the one I built, it has a resistor mode with 3 band/4 band/5 band input with the colour values on the keys, and it displays in Ohms, Kilo-ohms and Megaohms. It's really useful.

@MothKeeper 4 месяца назад

Yeah... it's not the same.

@frankowalker4662 4 месяца назад

@@MothKeeper Still, you can never have too many calculators.

@johncoops6897 4 месяца назад

I get most of my metric hardware from disassembly of discarded electronic gadgets. I harvest motors, steppers, rails,etc from printers. Only the USA uses "Imperial" and nothing is made in the USA now days, so basically anything you pull apart is full of metric bolts and screws.

@ronm6585 4 месяца назад

Thanks pileofstuff.

@loveminis31 4 месяца назад

Man your show going to rock!

@onecircuit-as 4 месяца назад

What an interesting mix of items! 👍😀

@frankowalker4662 4 месяца назад

I love the EM84 VU Valve. I've made quite a few projects with them. They look so funky.

@douro20 4 месяца назад

The 6E2 is actually closer to an EM87. It is pin compatible with an EM84 but its electrical characteristics are somewhat different. I think one has more gain than the other.

@jerril42 4 месяца назад

That looks like a resistor calculator I built a couple of years ago. The case is different. The buttons are super fiddly to get into the holes. Before soldering each button make sure the legs are perfect even before inserting. Thanks again. Take care.

@pileofstuff 4 месяца назад

Thanks for the tip.

@fredflintstone1 4 месяца назад

I built that calculator it works fine and the colour coded buttons gives you resistance of surface mount resistors a bit of fun🙂

@Hasitier 4 месяца назад

I also ordered this kit especially for the resistor color code function. I’d like to see your build on it as I have to build one myself soon I think.

@brettb.345 4 месяца назад

That calculator is interesting. I have that mp3 player, but never got around to playing with it.

@UnrealVideoDuke 4 месяца назад

Don't think I've seen any kit builds since December

@pileofstuff 4 месяца назад

I ran out of kits to build after December. I'm restocking and should be doing one next month.

@steubens7 4 месяца назад

all those dfplayer style sound trigger chips are a huuuuuuuuuuge pain in the bum. they might have uart control but you can't use it while it's playing any sounds, it will cause horrendous noises. eventually got the one i had under control but they really are for super simple applications. seriously, if you wanna conditionally play, say, 1 of 4 sounds, having all the files numbered in the right place and everything is a huge ordeal. they're best used in auto mode, it's designed for messages on busses and stuff about safety and routes. the midi one you're thinking of is probably the vlsi semiconductor vs1053 and friends. that's a whole codec chip that does a ton of stuff & has loadable software modules

@noggin73 4 месяца назад

I look forward to a Canadian Speak and Spell.

@AsilarWindsailor 4 месяца назад

Ben Heck has been summoned!

@DustinWatts 4 месяца назад

Always nice to have an anonymous donor :) Btw.. did someone already ask why you have a piece of red tape on your scalpel?

@pileofstuff 4 месяца назад

the tape adds a bit of thickness to the handle so I can pick it up off the desktop easier.

@DustinWatts 4 месяца назад

@@pileofstuff Asked and answered :)

@douro20 4 месяца назад

Odd that in a country where the law says you shall work in metric, metric hardware is so expensive...

@pileofstuff 4 месяца назад

A lot of construction materials and related hardware is still in US measurements. Part of it is for backward comparability, Part of it is that the manufacturers on this continent supply both the Canadian and the (much larger) US market. Stuff imported from overseas tends to cost more to get here, unfortunately.

@DeeegerD 4 месяца назад

I don't think I've ever seen you build anything (kits don't count)?

@pileofstuff 4 месяца назад

There's several in my video history over the last 7 years.

@Ernzt8 4 месяца назад

What's the difference between the first modules you unpacked and an optocoupler?

@geirendre 4 месяца назад

The DC-DC module can deliver power to drive a unit, like the XY-V17B MP3 module. You might need that if you connect the MP3 module to a mains powered unit, this is to avoid ground hum. The optocoupler only isolates a small signal and requires some circuit on both sides of it.

@MothKeeper 4 месяца назад

The opto's are coupled 👍

@pileofstuff 4 месяца назад

These are for power supply use. An opto-coupler is to pass signals (not power) across an isolation gap.