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General Description. The LP and LP are micropower voltage regulators with very low dropout voltage (typically 40mV at light loads and mV at. LPLPRE3 Texas Instruments LDO Voltage Regulators FIXED MICROPWR VLTG REG datasheet, inventory, & pricing. The LP and LP are micropower voltage regulators with very Careful design of the LP/LP has minimized all . See MIL/AERO Datasheet.

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What I like about the ATtiny26 board is the convenient arrangement of two ports with access to power and ground at several points, coupled with the well-laid out prototyping area. Is the RS option useful? Since there is some interest, my Geiger counter is based on a circuit described by Tom Napier in Circuit CellarNovember The HV generator is top right, leading to the connector for the V tube bias red arrow.

I suspect that no long term damage should result from this misuse, as long as one datasneet not exceed other component ratings. Of course we had these boards made in a batch, so now each time I populate one I have to bypass the power switch with tweezers to to clear that fuse.

The board dataasheet shown below. I just tried taking a regulator part not on a board and applied from 4.


I expect that the regulator can tolerate this but it might add some unnecessary current drain. See below for the exterior appearance. There is one error in the published circuit: I do that sort of thing all the time, and I have had no problems. If I connect the 4. My most recent project with the ATtiny26 board is a Geiger counter.

National Semiconductor – datasheet pdf

Thanks for checking on the regulator — maybe I shorted the power supply while hooking things up. There is a small current draw increase at 5. The unit is currently monitoring the cosmic background radiation in my office 95 counts in seconds.

Shop Blog Forum Support. The LP data sheet does not give any insight into this situation. By the way, there are a few manufacturers of the part, and your board probably has the one from On Semiconductor. It looks like the detector is on the same side as the display – does this mean you are checking yourself for radiation rather than pointing it at a source in front of you?

Can you try doing the regulator test again?

Pololu Forum

What puzzles me is that the regulator encounters this situation every time the external source is switched off and there are capacitors in the circuit that must be discharged, so there is some reason to think that such a transient backflow is not damaging.


I had to jump! I do intend to buy a few more — the sale price is very attractive, so be sure and save me a couple! Where did you get your Geiger tube?

Both have a thin and very datasheeh metalized membrane for measurement of alpha radiation. Well, I connected a 4. We even had some ATmega8 versions made, but we never sold them there were some other factors besides the ATtiny26 board not doing well, such as the mega coming out and the move to 6-pin ISP connectors.

LP Datasheet Alpha Semiconductor pdf data sheet FREE from

I could post the entire project if you think it would help sales of the ATtiny26 board I do intend to buy a few more — the sale price is very attractive, so be sure and save me a couple!

If only the ATtiny26 had a bit more memory… Thanks, Jim.

I can always use diodes to switch between solar and backup supply, dwtasheet I thought I could float charge the battery without such trickery. Can you tell me what you like about it? The rainbow cable leading off screen goes to the two pushbuttons and the LCD. The program currently occupies out of bytes of program memory.