Tag: project

A beefy electronic load (#P4F2)

Hello again!

I’ve been asked: What do you do with this electronic load thing? Well, I‘ve been using it as a battery torture device, what else could you do with a variable resistance device…

For a crude first step in actually testing my unit and also classifying a newly harvested set of deeply discharged 18650 cells, I slapped together some minimalistic Arduino program and hooked the thing up in parallel to the battery under test. The electronic load was set to 2 Amps with another battery, which was monitored by the Uni-T 203A current clamp. […]


A beefy electronic load (#P4F1)

Well, that was a long week…actually, it was a fortnight ;)

Here we go!

(the alignment of images really sucks when placed near the header of the post – thanks WordPress!)

So this puppy was manufactured by my new friends over at OSH Park (ordinary order, no extras) and I think I hit the express jackpot. I registered on June 8th and submitted my files – three hours later (1 AM my time on Friday) I already got notice of the panel assignment. Maybe the small size of 54mm x 31mm (2.1″ by 1.2″ for the Yankees out there) just made a perfect fit on the remaining board size and they sent it straight to production ;) As OSH Park charges 5 dollars per square inch of board area (for three units!), these were 12.75 USD including the free standard shipping. […]


Palladium LA-1000 pre-amp and Revox Evolution stereo system (#P2)

Well, this weekend I’ve been busy replacing dead and leaked caps from something not too Wan-Hung-Lo-ish…a Palladium LA-1000 pre-amp (“Vorverstärker”) back from the 80’s. These are still sold for absurd amounts of money (just like the Revox described down below), so I decided it’s worth a shot. Details on that thing are scarce, and so I’d like to post the cap list in case someone also needs replacements for their dripping electron containers.

Type	Voltage	Count	Reichelt ###	Price	Total	
1µ0	50V	1	RAD FC 1,0/50	0,15 €	0,15 €	
3µ3	50V	1	RAD FC 3,3/50	0,10 €	0,10 €	
4µ7	35V	4	TON 4,7/63	0,39 €	1,56 €	< -- bipolar type!
10µ	16V	2	RAD FC 10/50	0,08 €	0,16 €	
10µ	35V	1	RAD FC 10/50	0,08 €	0,08 €	
22µ	25V	2	RAD FR 22/50	0,06 €	0,12 €	
22µ	50V	1	RAD FR 22/50	0,06 €	0,06 €	
47µ	50V	6	RAD LXZ 50/47	0,09 €	0,54 €	
100µ	16V	2	RAD FR 100/16	0,06 €	0,12 €	
100µ	35V	2	RAD FR 100/50	0,13 €	0,26 €	
100µ	50V	3	RAD FR 100/50	0,13 €	0,39 €	
220µ	10V	2	RAD FR 220/16	0,11 €	0,22 €	
220µ	25V	1	RAD FR 220/35	0,12 €	0,12 €	
220µ	35V	2	RAD FR 220/35	0,12 €	0,24 €	
330µ	35V	1	RAD FR 330/50	0,48 €	0,48 €	
1000µ	50V	5	RAD FR 1.000/50	0,99 €	4,95 €	

You'll notice some caps are binned together, mostly because there are e.g.

[…]

Black 0-9 Digits Single Unit Pushwheel Thumbwheel Switch (WHL #11)

Folks, this is a big one. I will split into two articles to make the item review available now and show the finished project later (once I got a box around it). Maybe even three articles to post DMM comparison data. Today, I will show the unit and the first measuring results.

Back in January ( :neutral: ) I bought a 10-pack of these dials for 5.33€ including shipping at AliExpress. I saw these in the EEVblog forums and decided to have a go. And now you know the purpose of the assorted SMD resistors in WHL #10 ;)

First things first: Shipping took ages, and quality is very Wan Hung Lo’ish. […]