do these parts make a laser?

• Aug 18, 2013

• #17

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superh90x

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3 fresh AAA give about 4.8v, are you sure the batteries could be the problem?

 

• Aug 18, 2013

• #18

The Lightning Stalker

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I'm not 100% sure, but on mine there is a big increase in current between 4.8 - 5V. It refuses to deliver the full current at less than 5V.

 

Last edited: Aug 18, 2013

• Aug 18, 2013

• #19

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superh90x

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Sounds fair, I'll try that in the morning, what batteries do you use? Or should I use? Perhaps a 9volt? (Lol probably would break something)

 

• Aug 18, 2013

• #20

The Lightning Stalker

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Yes it would. I don't usually use batteries. I have a variable voltage power supply based on an LM338K. You might want to try 5 nickel batteries or a cell phone charger. Make sure you measure the voltage under load right where it enters the board. Cell phone chargers can have thin wires and crummy regulation, thus a bad voltage drop.

 

Last edited: Aug 18, 2013

• Aug 18, 2013

• #21

Kookapeli

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The TTL uses another 5V on top of what you're using, don't connect it to the TTL as it's not needed, 3AAA's should be fine with this