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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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? I suspect that no long term damage should result from this misuse, as long as one does not exceed other component ratings. There is one error in the published circuit: If I connect the 4.

National Semiconductor

The unit is currently monitoring the cosmic background radiation in my office 95 counts in seconds. Can you try doing the regulator test again?

We would probably buy a few, especially if the footprint was compact. 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! I do intend to buy a few more — the sale price is very attractive, so be sure and xatasheet me a couple! I do that sort of thing all the time, and I have had no problems.


The rainbow cable leading off screen goes to the two pushbuttons and the LCD. The board is shown below. Thanks for checking on the regulator — maybe I shorted the power supply while hooking things up. Fortunately, I disconnected it quickly enough to prevent any obvious permanent damage to the regulator. The JTAG fuse comes set, which makes some pins start up set high. I just tried taking a regulator part not on a board and applied from 4.

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

The program currently occupies out of bytes of program memory. Both have a thin and very delicate metalized membrane for measurement of alpha radiation. The counter input INT0 is marked with a green arrow. There is a small current draw increase at 5. 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.

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. 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.

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. Is the RS option useful? If only the ATtiny26 had a bit more memory… Thanks, Jim.


The LP data sheet does not give any insight into this situation. My most recent project with the ATtiny26 board is a Geiger counter.

ATtiny26 board / LP regulator – Electronics – Pololu Forum

See below for the exterior appearance. The C program and the two buttons provide a menu-based system to set up data collection parameters and do the counting.

dataxheet Since there is some interest, my Geiger counter is based on a circuit described by Tom Napier in Circuit CellarNovember By the way, there are a few manufacturers of the part, and your board probably has the one from On Semiconductor. It features an internal V power supply 2 mA total draw!

I could post the entire project if you think it would help sales of the ATtiny26 board. Can you tell me what you like about it? 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.

In my version, the tube is ll2950 so that small sources can be set right on top of the detector. 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.