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I went with a DPDT switch that I already had. One way turns it on. The other turns it on and adds the charger to the circuit. A little of both. I wanted it for work. Something that would have been loud enough and had long battery life probably would have cost twice as much. Drilling the 2x 4"...

Hello everyone. It's been awhile since I posted or visited here. Some of you may remember this. http://laserpointerforums.com/f51/auto-switch-circuit-design-99182.html I finished the project a while ago although I may do some additional work such as sealing some external parts with RTV...

I decided to go with a 12v 10Ah battery. After looking around at chargers more, I decided to find one made for SLA batteries. This is the one I plan on getting. 12v 8amp BC-12-8000F***Tempest Smart Battery Charger $39.00 You can pick which type of leads you want. I'll probably go with the one...

What about using something like this and come up with a way to charge the battery while only providing 12v to the amp? https://www.amazon.com/UpBright-Adapter-Monitors-Battery-Charger/dp/B00SCSP83G/ref=sr_1_1?ie=UTF8&qid=1480268127&sr=8-1&keywords=14v+5.5mm+power+adapter

This is one of the possible chargers I'm looking at. The OD and ID needs to be 5.5mm and 2.5mm. This one says the ID is 2.1 though. I've seen some that say 2.5/2.1. I figured 6 to 7 amp should be enough...

Nano or microseconds is short enough for me to consider it no delay. Will those diodes eat up power from a battery though? I want the simplest circuit possible that will not cause additional drain on the battery. I was thinking a relay that has a closed circuit while unpowered will produce the...

How tall are they? I bet 3 to 4 of them could fit inside one of these. https://store.usps.com/store/browse/uspsProductDetailMultiSkuDropDown.jsp?categoryNav=false&navAction=push&navCount=0&atg.multisite.remap=false&categoryId=flat-rate-shipping&productId=P_O_FRB2 Shipping would be 13.45 each...

I'm working on another project. Basically an ammo can "boom box" similar to this. Ammo Box Speakers I am wanting to have it auto switch between battery and outlet power without a delay. I know using a power adapter similar to that of one used for a laptop might cause a slight delay as...

Looks like some sort of scanner. Could be for barcodes or part of a sensor system for detecting objects.I'll take 2 to 4 of them depending on the cost.

I used a rotary phone and I'm 36...

A DPSS laser will fluctuate. Especially if it's used in a cool to cold environment.

Thanks. It is the 8th largest stadium in the world with a capacity of slightly less than 102,000. I was surprised how stable it is even in the nosebleed seating. I've been in much smaller stadiums that shook quite a bit even when the crowd goes crazy. List of the world's largest stadiums...

Went to my first Alabama game yesterday.

Any of the items in the first post. I know some are more and some are less than the cost of a 7475.

kmh message too short...

I ended up going with a driver similar to what Alaskan showed.

You just kind of confused me. The way you wrote that sounds like the collimation lens should be after the correction optics. CDBEAM shows it before the corrections optics. As for the G2, Idon't think ti will be bad considering DTR even offers it as an optional add on.

The reason I'm wondering is because I need to come up with some final dimensions. The further apart the lenses, the more expensive the project will be. It's probably going to cost $600+ as it is.

I don't have any hosts for sale at the moment. They are rated 2-3+ OD for 480 to 532 and 1.5+ for 470 to 555.

Okay, This stuff must go so I can fund a pointer project I'm working on and it isn't going to be cheap.