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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Did you look at the datasheet from that company? I expect that the regulator can tolerate this but it might add some unnecessary current drain.

Is the RS option useful? Not realizing this we designed our main board which uses the pushbutton power switch with one of these connected to the OFF pin.

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The C program and the two buttons provide a menu-based system to set up data collection parameters and do the datxsheet. By the way, I really like the board design.

Where did you get your Geiger tube? Beta and gamma radiation are much more penetrating so the direction the tube is pointing is less important and is actually irrelevant for gamma radiation. The program currently occupies out of bytes of program memory.

If only the ATtiny26 had a bit more memory… Thanks, Jim. In my version, the dataasheet is screened so that small sources can be set right datasbeet top of the detector. The HV generator is top right, leading to the connector for the V tube bias red arrow. It features an internal V power supply 2 mA total draw!


Since there is some interest, my Geiger counter is based on a circuit described by Tom Napier in Circuit CellarNovember ratasheet The rainbow cable leading off screen goes to the two pushbuttons and the LCD.

There is a small current draw increase at 5. Both have a thin and very delicate metalized membrane for measurement of alpha radiation. 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.

I can always use diodes to switch between solar and backup supply, but I thought I could float lp295 the battery without such trickery.

National Semiconductor – datasheet pdf

The LP data sheet does not give any insight into this situation. We would probably buy a few, especially if the footprint was compact. Can you try doing the regulator test again? The JTAG fuse comes set, which makes some pins start up set high.

I especially like the plated through holes, which are fantastic for prototyping if you have to remount components several times. 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?

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. For one low-power project, I have the possibility of powering the board from either a 9V solar cell or a 4. My power supply current-limited at about 1 amp.


I just tried taking a regulator part not on a board and applied from 4. 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 datqsheet.

The counter input INT0 is marked with a green arrow.

Fortunately, I dtasheet it quickly enough to prevent any obvious permanent damage to the regulator. I suspect that no long term damage should result from this misuse, as long as one does not exceed other component ratings.

LP Datasheet UTC pdf data sheet FREE from

I had to jump! Thanks for checking on the regulator — maybe I shorted the power supply while hooking things up.

My most recent project with the ATtiny26 board is a Geiger counter. There is one error in the published circuit: Shop Blog Forum Support. I do intend to buy a few more — the sale price is very attractive, so be sure and save me a couple!

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 I connect the 4. Well, I connected a 4. See below for the exterior appearance. The board is shown below. I do that sort of thing all the time, and I have had no problems. Can you tell me what you like about it?