Тёмный

EO&N Really Cheap Decade Resistor Substitution Box - build and testing  

Electronics Old and New by M Caldeira (Electronics Old and New)
Подписаться 25 тыс.
Просмотров 4,9 тыс.
50% 1
ВидеоПоделитьсяСкачатьДобавить в

Only $5 for 10 PCBs and every new member get $5 bonus. + Express 24 hour / 48 hour service on www.pcbway.com/
After I published my Capacitor Leakage Tester in the form factor that fits to the row of test equipment under the shelf on my bench, many viewers suggested I add a resistor substitution box. I have had one of these in mind for some time, and considered building one using the conventional rotary switches. However, good quality 10-position switches are very expensive, so I decided to try a DIP switch version to see how it would turn out.
As it happens, I am extremely happy with the result, and have therefore posted the project in the 'share' section of PCBWay, the sponsors of this video. The link is below:
www.pcbway.com...
You can now support the channel:
/ mcaldeira
paypal.me/maca...
_____HUNDREDS OF OTHER VIDEOS TO CHOOSE FROM____
DIY TEST GEAR: The title says it all:
• Zener Diode Tester - P...
RESTORATION BUILDING BLOCKS: A series of videos showing detailed steps used the restoration process of tube equipment:
• How to safely check th...
HowTo's: Various videos on some simple techniques and projects:
• Extend tube radio FM b...
See also playlists on some other completed restoration projects.
PHILIPS BX750A:
• Philips BX750A tube ra...
TELEFUNKEN OPUS 2114:
• Telefunken Opus 2114 s...
SABA UW-175-Z 3D:
• Saba UW 175-Z 3D tube ...
GRUNDIG 1070:
• Grundig 1070 tube radi...
SCHAUB-LORENZ GOLDY 58 type 3020:
• Schaub-Lorenz Goldy 58...
BUSH VHF64:
• Bush VHF64 tube radio ...
GRUNDIG 3060A:
• Grundig 3060a tube rad...
TELEFUNKEN OPERETTE 8:
• Telefunken Operette 8 ...
GRAETZ SUPER 171W:
• Graetz Super 171W tube...
LOEWE-OPTA MAGNET 3737W:
• Loewe-Opta Magnet 3737...
BRAUN ATELIER 3:
• Braun Atelier 3
LOEWE-OPTA TRUXA STEREO 4741W:
• Loewe-Opta Truxa Stere...
GRAETZ COMEDIA 616:
• Graetz Comedia 616 tub...
SABA FREIBURG W2:
• Saba Freiburg W2 (WII)...
GRAETZ MUSICA 4R417:
• Graetz Musica 4R417 re...
You may also be interested in ...
CAPACITOR LEAKAGE TESTER:
• Capacitor leakage test...
#tuberadios #radiorestoration

Опубликовано:

 

17 окт 2024

Поделиться:

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист
Посмотреть позже
Комментарии : 45   
@borayurt66
@borayurt66 Год назад
Something I always wanted to build. Using dip switches is an idea that never occurred to me, nice thought. Internal contact resistance of those switches turned out surprisingly good, I wouldn't expect that since they are usually meant for digital use. Instead of getting expensive 0.1% resistors, one can get like a 100 (or more) packs of 1% ones and choose the best 10 out of them. Great project!
@electronicsoldandnew
@electronicsoldandnew Год назад
👍
@mackfisher4487
@mackfisher4487 Год назад
Manuel, Nice project, easy to build and a great addition to a test bench. Plus the added benefit of keeping PCB Way happy. Suggestion for PCB way project: An IR proximity detector and speech synthesizer. You could put it behind a mirror and when your cat approached the mirror and saw its own image it would meow at him.
@electronicsoldandnew
@electronicsoldandnew Год назад
That’s quite an idea 😊 but I’d rather program the word “handsome” in for when it detects me 😊
@mackfisher4487
@mackfisher4487 Год назад
@@electronicsoldandnew Better yet use facial recognition software when it recognizes the two women in your life have it pronounce them as the fairest of them all as in snow white. Oh yes and when it Recognize you ask if you've taken out the garbage.
@electronicsoldandnew
@electronicsoldandnew Год назад
Two problems with that. 1) there would be constant war between the two, and 2) there’s nothing in it for me 😊
@jw200
@jw200 Год назад
Thanks. Will do the same. Thanks for sharing pcbway project
@electronicsoldandnew
@electronicsoldandnew Год назад
Pleasure
@Starlight-AG
@Starlight-AG 11 месяцев назад
Good video. Just a note, regardless of how many resistors you switch in, the power handling is 1 Watt as they are in series configuration. Parallel configuration will give increased power handling. example... If you needed a 10 ohm resistance with a 2 watt power capability (and you did not have a 10 Ohm 2 watt resistor, you could use 2 20 ohm 1 watt resistors in parallel and the total resistance would be 10 ohms and capable of 2 watts. It's a nifty tool which I use for determining required resistances in design work. 😀
@electronicsoldandnew
@electronicsoldandnew 11 месяцев назад
👍
@ivolol
@ivolol 11 месяцев назад
BTW I highly advise put small curves on the corners of your PCB edges, makes them nice to handle (unless there's other design considerations)
@poormanselectronicsbench2021
@poormanselectronicsbench2021 Год назад
Looks like a well thought out construct, thanks for sharing it! One question though, did you order the parts from a supplier like Digikey or Mouser? If you did, I know that you can make the BOM / List public at Digikey, ( not sure about Mouser), to make it a bit easier for interested parties to source parts. It might not be too hard to size that up to a project box, set in it with some stand off mounts, and then make a PCB with cutouts for the switches, no copper, and stencil it for your switches and raise it up a bit with some stand offs as well.
@electronicsoldandnew
@electronicsoldandnew Год назад
I got the resistors from Mouser. The switches from a local supplier.
@BjornV78
@BjornV78 Год назад
An idea to ease up the selection, is to use 1 rotary switch to choose which of the 7 "resistor banks" , and then on the resistor bank itself you choose the value with the DIP switches. That way, you don't always have to move 6 resistor banks to zero, and the lifetime of the DIP switches will also extend. Grtz
@electronicsoldandnew
@electronicsoldandnew Год назад
👍
@BjornV78
@BjornV78 Год назад
@@electronicsoldandnew , as i think of it, with the idea that i mentioned, you can only set the value of 1 resistor at the time, and not combined 2 or more resistors in series. Grtz
@electronicsoldandnew
@electronicsoldandnew Год назад
😊
@k.oldewurtel4261
@k.oldewurtel4261 Год назад
Hi Manuel, nice project. I would proposed to use the "10" position (instead of "1") to bridge out the resistor bank. With this you have a direct indication of the resulting resistance multiplier by the numbers written on the DIP switch...
@electronicsoldandnew
@electronicsoldandnew Год назад
That’s a great idea 😊
@k.oldewurtel4261
@k.oldewurtel4261 Год назад
...and a few holes on each corner will be very helpful as well even if you use the board naked with standoffs or assembled in a box.
@electronicsoldandnew
@electronicsoldandnew Год назад
👍
@TheEmbeddedHobbyist
@TheEmbeddedHobbyist Год назад
The weak spot is the switches, as these types are not normally designed to handle much current. As 1 ohm, 1W = 1A
@electronicsoldandnew
@electronicsoldandnew Год назад
True. Low power only.
@TheEmbeddedHobbyist
@TheEmbeddedHobbyist Год назад
@@electronicsoldandnew i've seen a few smoked decade resistance boxes in the past, its so easy to forget.
@electronicsoldandnew
@electronicsoldandnew Год назад
Makes the hobby more exciting 😊 💨
@bofor3948
@bofor3948 Год назад
I would suggest at 1% tolerance resistance splitting the box in two halves. 0 to 9k and 10k to 9M. The 1k range was already negating the changes of the 0 to 9ohm range. Changing the larger three ranges to expensive 0.1% resistors may help a little. Better to have two separate outputs for two ranges, with the option to link together if setting the box(es) up against an accurate measuring device before use.
@electronicsoldandnew
@electronicsoldandnew Год назад
👍
@migsvensurfing6310
@migsvensurfing6310 Год назад
Never had a use for a resistance box in my 45 years in electronics. I think it is more for use in a classroom situation.
@AnnaVannieuwenhuyse
@AnnaVannieuwenhuyse Месяц назад
I use one regularly for simulating potentiometer or sensor values, without the hassle of potentiometers and with the repeatability of a switch. I can trim values of on board resistors by putting this in parallel and switching in resistors until it's good, without the downsides of potentiometers.
@electronicsoldandnew
@electronicsoldandnew Месяц назад
I’ve used mine to adjust biasing in guitar effects pedals using jfets. Quite handy.
@Batmule
@Batmule Год назад
A cheaper alternative (that seems easier to source) is a 2×10 pinheader and a jumper for selecting each decade. You can even get the jumpers with a small plastic tab for easy grabbing.
@electronicsoldandnew
@electronicsoldandnew Год назад
I thought of that, but then decided to go for this option. It’s a little more self-contained.
@paul-c7541
@paul-c7541 Год назад
All my old test equipment is getting far too old, so I'm studying your videos, to build your designs, if that's ok with you.
@electronicsoldandnew
@electronicsoldandnew Год назад
No problem. Enjoy
@parochial2356
@parochial2356 Год назад
Suggestion: increase the board size by say 1.0 inch in width & length & add holes in the 4 corners for stand off mounting? Another idea: break it into 2 boards, dips on 1 board and resistors on the other for ease of soldering. Connect the 2 with wires to keep the cost down or design for a suitable ribbon cable, although at increases cost.
@electronicsoldandnew
@electronicsoldandnew Год назад
👍
@Mrdibzahab
@Mrdibzahab Год назад
What is the lifetime of those dip-switches?
@electronicsoldandnew
@electronicsoldandnew Год назад
Each supplier should state the number of repetitions in their data sheets, so they will vary depending on the brand.
@maartenschapendonk6345
@maartenschapendonk6345 Год назад
If you would use a 1 watt only for every first resistor, you could use less for the others and still have a minimum of 1 watt
@electronicsoldandnew
@electronicsoldandnew Год назад
True. I though of that but then found that my supplier sells batches of 10 resistors at a lower price than the separately rated ones. That’s why I simply used the same types.
@NeverTalkToCops1
@NeverTalkToCops1 Год назад
Cheap? No, this gizmo is ridiculous. Who is going to flip all those tiny switches? There's a good reason that resistor substitution boxes use thumbwheel switches.
@19janiboy96
@19janiboy96 Год назад
You still gotta appreciate the effort instead of being so overly criticisive. I'm actually thinking of building one´.
@electronicsoldandnew
@electronicsoldandnew Год назад
👍
@goodun2974
@goodun2974 Год назад
​@@19janiboy96,, The main reasons I use an oldfashioned resistor substitution box at work (audio repair shop) are 1) for discharging power supply capacitors, where this device would almost certainly get burned up, and 2) for selecting the voltage-dropping/current-limiting resistor value to use when changing dial illumination and function indicator bulbs in vintage stereo equipment over to LED's, for which this *might* work. Frankly, my advice is to find an old resistor substitution box or decade box and maybe upgrade a few of the resistors as needed, in case any have drifted off spec or the wattage is a little too low. I use an old EICO substitution box that contains 2 rotary switches and one slide switch to select the ranges; with heavier duty resistors subbed for the lowest-ohms resistors, it works great. I haven't managed to burn the thing up yet, which for me is a minor miracle.🙃
@electronicsoldandnew
@electronicsoldandnew Год назад
I agree that the old boxes are great. I just wanted a few of these as I often need them for low voltage / low power applications.
Далее
EEVblog 1586 - Stranger Things Decade Resistor Box + Repair
16:08
EEVblog 1586 - Stranger Things Decade Resistor Box + Repair
Просмотров 45 тыс.
DIY Test Gear: Dim Bulb Limiter / Tester with Isolation - Design and Build
31:49
DIY Test Gear: Dim Bulb Limiter / Tester with Isolation - Design and Build
Просмотров 38 тыс.
АНАЛИЗЫ (смешное видео, поржать, юмор, прикол, смех)
00:59
АНАЛИЗЫ (смешное видео, поржать, юмор, прикол, смех)
Просмотров 1,5 млн
Million jamoasi - Amerikaga sayohat
12:37
Million jamoasi - Amerikaga sayohat
Просмотров 497 тыс.
РЫБКА С ПИВОМ
00:39
РЫБКА С ПИВОМ
Просмотров 1,5 млн
ARGENTINA vs. BOLIVIA [6-0] | RESUMEN | ELIMINATORIAS SUDAMERICANAS | FECHA 10
10:08
ARGENTINA vs. BOLIVIA [6-0] | RESUMEN | ELIMINATORIAS SUDAMERICANAS | FECHA 10
Просмотров 9 млн
#720 Resistor and Capacitor Decade Boxes on the Cheap
11:57
#720 Resistor and Capacitor Decade Boxes on the Cheap
Просмотров 8 тыс.
EEVblog #461 - Genrad Decade Resistance Box Teardown
35:08
EEVblog #461 - Genrad Decade Resistance Box Teardown
Просмотров 72 тыс.
#1664 Resistor Substitution Box
13:34
#1664 Resistor Substitution Box
Просмотров 4 тыс.
High-Z Active RF/AF Probe with AGC. Making something good even better. #PCBWay#
35:22
High-Z Active RF/AF Probe with AGC. Making something good even better. #PCBWay#
Просмотров 19 тыс.
Take 2 on the DIY Tube Tester Power Supply. Much, much better! Part 2
32:18
Take 2 on the DIY Tube Tester Power Supply. Much, much better! Part 2
Просмотров 6 тыс.
TSP #91 - DeoxIT Challenge & Restoration of a Precision Decade Resistor Box
10:57
TSP #91 - DeoxIT Challenge & Restoration of a Precision Decade Resistor Box
Просмотров 18 тыс.
Can we make a Solid State EABC80/6AK8 Triple Diode Triode Tube? If so, Why? #pcbway#
39:51
Can we make a Solid State EABC80/6AK8 Triple Diode Triode Tube? If so, Why? #pcbway#
Просмотров 23 тыс.
The most useful tool ever for electronics repairs - (PWJ212)
13:09
The most useful tool ever for electronics repairs - (PWJ212)
Просмотров 263 тыс.
The all-important IF alignment of the AM - Tube Radio Restoration Back to Basics part 10 #pcbway#
36:19
The all-important IF alignment of the AM - Tube Radio Restoration Back to Basics part 10 #pcbway#
Просмотров 2,8 тыс.
Elenco RS-500 Decade Box (Resistance Substitution Review & How it Works)
6:50
Elenco RS-500 Decade Box (Resistance Substitution Review & How it Works)
Просмотров 1,3 тыс.
АНАЛИЗЫ (смешное видео, поржать, юмор, прикол, смех)
00:59
АНАЛИЗЫ (смешное видео, поржать, юмор, прикол, смех)
Просмотров 1,5 млн