Next, and last.
So what did I get in my lot of components exactly ?
Spread it all over the bench and took some notes... here goes :
It's all NIB or in new condition at least.
LEDs :x100 5mm Blue
x100 5mm Red
x100 5mm Green
x100 5mm Yellow
x100 5mm White high luminosity.
x34 3mm Red high luminosity.
- x60 tactile switches, 20 of 3 different heights (4/5/6mm)
- x4 lovely beefy ceramic power resistors, I just love ceramic resistors, so cute.
- x10 multiturn vertical trim pots.
- x10 9V battery couplers
- x1 10MHz Crystal
- x164 PCS assortment of heat shrink tubing, various sizes and colours.
- 4 gold plated RCA panel mount sockets.
- x2 50R BNC panel mount sockets
- x7 gold plated 4mm banana jacks
- x7 bags / types of Germanium diodes. Eyeballing it, say 100 diodes in total, something of that order. Germanium diodes are useful when you work on vintage gear like me
![Grin ;D](https://www.eevblog.com/forum/Smileys/default/xgrin.gif.pagespeed.ic.QVVz6XIT20.png)
- x200 (no typo) 1N4148 diodes, because you can never have too many 1N4148.
- A small kit of some sort, already assembled. Came with the instruction sheet, all in Chinese... but the schematic is there, and even I can read a Chinese schematic !
![Evil >:D](https://www.eevblog.com/forum/Smileys/default/xevil.gif.pagespeed.ic.tdrs7Uj5gu.png)
There is a microphone on one end, an audio jack on the other end, and 3 cascaded trannies in between. Looks like the first two trannies each provide voltage amplification, and the last one looks more like it provides current amplification to drive the audio whatever that you would connect to the jack socket thingy. Sorry audio is not my part !
So a mic with a preamp...Not too sure what that could be used for ?! Stick it inside a guitar then feed that to an amplifier to make noise on stage, "concert" I think they call it ??
Might play a bit with that tomorrow, who knows...
- A couple of little antennae. They sport a BNC 50R connector it looks like, so I of course rushed to stick on of them to my scope, hoping to see something on the screen to keep me entertained... no luck : the BNC of the antenna will NOT fit on the scope ?!
![Confused :-//](https://www.eevblog.com/forum/Smileys/default/confused0024.gif.pagespeed.ce.5xOqKkq0Co.gif)
Looked more closely, see picture below... could not believe it. The BNC on the antenna looks like a Male plug on the OUTside, but INside it's FEmale not male !
![WTF? :wtf:](https://www.eevblog.com/forum/Smileys/default/wtf2.gif.pagespeed.ce.pxLiY5pjs4.gif)
It's neither male nor female, it's a mix of the two, it's a " hybrid " !! What the hell is this thing ?! I sure don't have any adapter for such a weirdo plug !
![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/xfacepalm.gif.pagespeed.ic.EBDwh1hCfo.png)
If you know where to find one...
- Kept the best for dessert : I could not believe it... in that lot was a VOLTAGE REFERENCE !!!
![DMM :-DMM](https://www.eevblog.com/forum/Smileys/default/smiliey_dmm.gif.pagespeed.ce.CvRqtDiING.gif)
A chip Chinese one of course, probably not much good but since I don't have any yet have 25 old DMM, even a Chinese one is marvelous, I have a Vref now, my start in Volt nuttery !!!
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif.pagespeed.ce._hfWAz_QHO.gif)
See pics. It's a nice one : comes with the crap acrylic case AND a battery with charging circuitry on the PCB. Has a tiny USB port to charge it.. need to see if I have a USB cable with the correct plug type, and will charge it overnight and play with it tomorrow. The sticker at the back gives a real measurement of each output (2.5V, 5V, 7.5V and 10V). I see that it uses an AD584KH.
I pulled the datasheet for that. Looks like there are two variants of this chip: suffixes 'J' and 'K'. The K is the most accurate of the two, the most stable as well, cool. 15ppm/°C.
I see that the 4 available voltages are produced by the chip it self, not by external circuitry.
Native precision 3.5mV at best, on the 2.5mV output (gets worse and worse as you select a higher output voltage).
So not stellar. I don't know it that can be trimmed for better precision, not if they Chinese who sells those boxes bothered doing it.. .probably not.
Sticker at the back gives actual figures for each output voltage, measured with a HP 34401A DMM, so not super high accuracy I guess isn't it ? What is it on this meter ? ... but it will do.
It says 2.50129 Volts for the 2.5V output.
Will play with the thing tomorrow I am sure, if I can find a USB cable to recharge its battery !
![Evil >:D](https://www.eevblog.com/forum/Smileys/default/xevil.gif.pagespeed.ic.tdrs7Uj5gu.png)
Even got to keep the nice plastic box the lot came in ! Good quality and with a hinged lid, worth a few Euros in itself !
![Cool 8)](https://www.eevblog.com/forum/Smileys/default/xcool.gif.pagespeed.ic.cOxV6sPNRd.png)
So.... got all that for 10 Euros, pretty much down the street, zero shipping zero driving.... I am happy camper !!
![Cheesy :D](https://www.eevblog.com/forum/Smileys/default/xcheesy.gif.pagespeed.ic.KPzuH4J-TG.png)
EDIT : I just found the correct USB cable, Vref is now charging !
![Evil >:D](https://www.eevblog.com/forum/Smileys/default/xevil.gif.pagespeed.ic.tdrs7Uj5gu.png)
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1437751;image)