First test of UV-LED array

Running from a common boost regulator.
There are 70 LED's total. 10 LEDs in each series arranged in 7 rows.
Each of the 10 LED rows has a 46 mA constant-current regulator as there appeared to be large Vf-variations between the rows. Only running at 28 mA now in vid due to supply restriction.

Category:

Howto & Style

Tags:

• UV
• LED
• constant
• current
• array

[gbj222]

Hi there - is this for sunbathers ?

Or some technical process?

[1kreature]

The idea is to use it for transfer of circuit-designs from foil to the PCB.

First step is the exposure, then you develop like with a photo. Next you etch the circuit.

[gbj222]

Ah, thanks.

Do be careful, a guy I knew made his eyes VERY VERY sore for a week, the UV can be pretty strong.

[1kreature]

@gbj222 Yes, do not sit and stare at it.

I use a timer and go do something else while it exposes.

[HallPassExpired]

uv light can blind you and burn your skin, staring at them is really, REALLY stupid...lol