What's in today's post?
NE555 Duty Cycle and Frequency Adjustable Module Square Wave rectangular wave http://www.ebay.co.uk/itm/-/310702401768
NE555 Pulse Module LM358 Duty Cycle Frequency Adjustable Module Square Wave http://www.ebay.co.uk/itm/-/310703064800
NE555 DC 12V Delay relay shield Timer Switch Adjustable Module 0 to 10 Second http://www.ebay.co.uk/itm/-/310979634874
USB Mini Clip MP3 Player Screen Support LCD Up To 16GB Micro SD TF Card 5 Colors http://www.ebay.co.uk/itm/-/371151312150
Red Universal Car Windshield Stand Mount Holder For PDA iPod Cell Phone GPS New http://www.ebay.co.uk/itm/-/371144309750
10 Pcs 2cm x 8cm FR-4 Two Sided Prototype DIY Universal PCB Print Circuit Board http://www.ebay.co.uk/itm/-/191241792438
8PCS Double Side Prototype PCB Tinned breadBoard 5x7 4x6 3x7 2x8CM Each 2Pcs FR4 http://www.ebay.co.uk/itm/8PCS-Double-Side-Prototype-PCB-Tinned-breadBoard-5x7-4x6-3x7-2x8CM-Each-2Pcs-FR4-/310910403198
NE555 Duty Cycle and Frequency Adjustable Module Square Wave rectangular wave http://www.ebay.co.uk/itm/-/310702401768
NE555 Pulse Module LM358 Duty Cycle Frequency Adjustable Module Square Wave http://www.ebay.co.uk/itm/-/310703064800
NE555 DC 12V Delay relay shield Timer Switch Adjustable Module 0 to 10 Second http://www.ebay.co.uk/itm/-/310979634874
USB Mini Clip MP3 Player Screen Support LCD Up To 16GB Micro SD TF Card 5 Colors http://www.ebay.co.uk/itm/-/371151312150
Red Universal Car Windshield Stand Mount Holder For PDA iPod Cell Phone GPS New http://www.ebay.co.uk/itm/-/371144309750
10 Pcs 2cm x 8cm FR-4 Two Sided Prototype DIY Universal PCB Print Circuit Board http://www.ebay.co.uk/itm/-/191241792438
8PCS Double Side Prototype PCB Tinned breadBoard 5x7 4x6 3x7 2x8CM Each 2Pcs FR4 http://www.ebay.co.uk/itm/8PCS-Double-Side-Prototype-PCB-Tinned-breadBoard-5x7-4x6-3x7-2x8CM-Each-2Pcs-FR4-/310910403198
Can you make an inverter with an auridino and also that will regulte the out put voltage and frequency with different loads because simeple inverter has a big problem which is there out put voltage is not stable with different types of load …
Thank you Julian for your presentations. I purchased a few of those useful items.
damn you british-men-voices of very relaxing and sympatic tone-voice, precurius how much i enjoy and relaxing to that tone of speak, and same with that british dude "techmoan"..
not sure what it is, that are doing it, and if its just us here from Denmark in scandinavia that finds these tone-charitica from england very calming and relaxing.
none the less, could hear that tone all day..(weird' and certainly don't do wonders for my personal man-ego)
anyway thx for yet another postbag-vid, apreciated.
the tacky mp3 player, did you summit the mah in that very thin battery, and what it would manage..
I like how he buys stuff just to tear it apart 🙂
so what did you do to the mp3 itself?
I'm sure plenty of people still use MP3 players… I see four in my street alone, including me. Mine is thumb-sized, has a battery that lasts for days, doesn't need recharging overnight, doesn't keep talking to a network, giving my position away and irradiating my body, has worked for six years, and has hugely more memory than an iPhone.
And, no, it's not an iPod.
I personally see using a phone for listening to music, at present technology and prices, as going backwards.
But I guess I'm not 'cool', nor am I following the Apple "OBEY" commands.
Postbag is great!!
Will you do a Christmas special? 🙂
I just got a hc-05 bluetooth adapter and the contents on the jiffy bag said ''shirt''….
You raise an interesting question at the start of this one Julian – at which point do you abandon ICs and discretes and start using a micro-controller? I guess it comes down to a component price and design time. You can get 10x 555s or LM358s for a quid, 5x Attiny13s for £2 or a pro-mini for £1.50ish. I think if I used an ATtiny or pro-mini just to do a simple astable flash, I'd kinda feel like I was wasting precious micro-controllers.
Hi Julian,
did you hear about the FTDI fiasko?
I think this is a big deal for everyone who is interested in electronics.
555 is by FAR easier, no requirement for a computer 😉
Have you had any FTDI troubles? Im a little worried about plugging my 3d printer in at the moment. lol
My favorite way to flash an led is with the simple 2 transistor, 2 capacitor, 2 resistor, 2 trimpot method. Managed to squeeze this into a small heatshrink casing and got some blinky leds!
I really quite enjoy watching you open random electronics from china. Its always fun to open up mail, and theres something entertaining about watching you play with these parts and come up with little projects for them. I'm a fan of this segment!
thous mp3 players are a pice of shrim, a brandnew just get fat while charging in around 1 hr.
Oh, by the way Julian, have you hear about the divice ESP8266 wifi module for arduino?
So sad, no more DC-DC Buck, Boost or Sepic purchase.
for a flashing led… wouldn't a multivibrator circuit be the easiest ? just a couple transistors and caps, and some resistors.
those little mp3 player are rubbish even from audio quality…
mine was 160mAh but got puffy very fast (yet protection ic on it)