FS: ***Selectable test load up to 3A (assembled or DIY kit)*** IN STOCK!

[The Lightning Stalker]

By the way, is there a list on here of all the diodes voltage drops?

The voltage drop will change with current.
Use Figure 2 Typical Forward
Characteristics in the 1N540x datasheet.

http://www.diodes.com/datasheets/ds28007.pdf

The resistor will then add another voltage
drop in a 1:1 proportion with the current.

So as an example, say your diode is a
typical M140 running at 1.8A. Dropping
around 4.6-4.8V, first subtract the voltage
drop of the resistor, which will be 1.8V.
Then divide that by the voltage drop of a
single diode, 0.85. So 3 or 4 diodes would
be about right.

4.7 - 1.8 / 0.85 = 3.4 diodes

 

[Jufran88]

Wow, I must have misread that post pman. For some reason I was thinking laser diodes. I have a table on my site for each jumper. It doesn't include the resistor voltage drop so just add that in. The table is based off the data sheet for the diodes used.

https://sites.google.com/site/thejuf88/home/electronics/usetestload

 

[jvarga]

bottom line cost for option 1 and option 2. Postal code 33325.
Thanks

 

[VisibleGreen]

Wow, I must have misread that post pman. For some reason I was thinking laser diodes. I have a table on my site for each jumper. It doesn't include the resistor voltage drop so just add that in. The table is based off the data sheet for the diodes used.

https://sites.google.com/site/thejuf88/home/electronics/usetestload

Whoops I was wrong. Thanks for the link!

 

[The Lightning Stalker]

Wow, I must have misread that post pman. For some reason I was thinking laser diodes. I have a table on my site for each jumper. It doesn't include the resistor voltage drop so just add that in. The table is based off the data sheet for the diodes used.

https://sites.google.com/site/thejuf88/home/electronics/usetestload

Hmm, maybe I read it wrong, then.
Maybe he did mean laser diodes. :can:

 

[Pman]

Sorry if I was confusing. Laser diode voltage drops it's all good though so thanks to all who as we're in any capacity

 

[10fenny]

I was kind of wondering this myself. It seems like something hard to find unless you made notes.

edit: even with the search bar.

 

[The Lightning Stalker]

There are quite a few different diodes. What I usually do is search for a graph or chart for the particular diode.

But, as a rule of thumb,

IR = 2.0V
Red = 2.3 - 2.5V
NDG700 = 4.8V
NDG7475 = 5.0 - 5.3V
Blue = 4.8V
405nm = 5.8V
Osram 520nm = 6.0 - 6.8V

 

[10fenny]

Right on! This will be going into my notes

 

[Jufran88]

Back in stock guys! :beer:

 

[The Lightning Stalker]

I finally got the strength to solder my new
board.

 

[crazyspaz]

Looks good Jufran did a good job with these, they look really nice, in a very simple way.

 

[The Lightning Stalker]

:thanks:
Yes, he does. You should see what I had
been using up until now.

 

[CoherentRays]

I tried to order a test load either assembled or as a DIY kit. The sales page says sold out in either configuration. When will you have more in stock?

PM sent.

CoherentRays

 

[Jufran88]

Pending payment for the last test load, sorry guys! PM replied! :beer:

 

[Pman]

I bought 2 of these. One as a kit and one pre-made and use them all the time. Haven't used my Crazyspaz 10A one yet but it's ready to go when I need it. Weird how his was for sale for some time and Noone jumped on it. Worked out great for me though