- Feb 9, 2011
FOR SALE: 3A SELECTABLE TEST LOADS
UPDATE: ***TEST LOADS ARE IN STOCK AS OF 1/26/15***
These test loads have jumper terminals to select the number or diodes, 1-10, you want to use or simulate a specific voltage drop.
Now, for some people who are wondering what is a test load/dummy load and why do we need it? A test load or dummy load acts like or simulates a laser diode to safely measure how much current is going through it from the driver. Without one you run the risk of destroying or damaging the laser diode.
NOTE #1: These diodes are safely rated up to 3A, but at higher currents (more than 1A) they will get hot. I would advise less than 1 minute cycles for high currents or if you want you could place a small heat sink on top of these diodes and or resistor to help cool the test load if you plan on using these for more than 1 minute. Easy to find small heat sinks at RadioShack, DX, or you can source your own.
NOTE #2: If the driver you are using has a capacitor (most likely), you need to discharge the capacitor using a resistor before connecting it to the actual laser diode to prevent voltage spikes that might kill it or damage it.
They compose of:
- (1) Custom test load PCB
- (10) 1N5404 diodes (rated up to 3A)
- (18) male straight gold plated breakaway headers (rated up to 3A)
- (1) jumper connector
- (1) metal oxide 1 Ohm 5 Watt 2% tolerance resistor
10 diodes for a selectable range (number designates diodes on the jumper)
*remove jumper pin to use all 10 diodes*
Size comparison to a quarter:
*All assembled test loads are tested to ensure they work properly*
There are 2 options:
Option 1: A fully assembled test load
Option 2: DIY kit. I'll provide all components and you can solder them on.
- PayPal only
- If you require signature confirmation it will be an extra $2.10
Option 1: $14 + shipping + PayPal fees
Option 2: $10.50 + shipping + PayPal fees
Domestic: USPS First Class Mail w/ tracking #
International: PM me first
PM me or post here if your interested.