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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Is the RS option useful? The rainbow cable leading off screen goes to the two pushbuttons and the LCD. I just tried taking a regulator part not on a board and applied from 4.

My power supply current-limited at about 1 amp. The LP data sheet does not give any insight into this situation. If I connect the 4.

Can you try doing the regulator test again? Both have a thin and very delicate metalized membrane for measurement of alpha radiation. Thanks for checking on the regulator — maybe I shorted the power supply while hooking things up.

National Semiconductor – datasheet pdf

The unit is currently monitoring the cosmic background radiation in my office 95 counts in seconds. Since there is some interest, my Geiger counter is based on a circuit described by Tom Napier in Circuit CellarNovember It features an internal V power supply 2 mA total draw! Shop Blog Forum Support. We would probably buy a few, especially if the footprint was compact. 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.

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What puzzles me is that the datashewt 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 xatasheet to think that such a transient backflow is not damaging.

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.

My most recent project with the ATtiny26 board is a Geiger counter. 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.

I suspect datasheey no long term damage should result from this misuse, as long as one does not exceed other component ratings. Well, I connected a 4. There is a small current draw increase at 5. Beta and gamma radiation are dataaheet more penetrating so the direction the tube is pointing is less important and is actually irrelevant for gamma radiation.

See below for the exterior appearance. By the way, I really like the board design.

The HV generator is top right, leading to the connector for the V tube bias red arrow. Can you tell me what you like about it?

Fortunately, I disconnected it quickly enough to prevent any obvious permanent damage to the regulator. Not realizing this we designed our main board which uses the dtasheet power switch with one of these connected to the OFF pin.

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 daatsheet couple!


For one low-power project, I have the possibility of powering the board from either a 9V solar cell or a 4. I do intend to buy a few more — the sale price is very attractive, so be sure and save me a couple! Did you look at the datasheet from that company? The program currently occupies out of bytes of program memory. The board is shown below. I expect that the regulator can tolerate this but it might add some unnecessary current drain. Where did you get your Geiger tube?

By the way, there are a few manufacturers of the part, and your board probably has the one from On Semiconductor. In my version, the tube is screened so that small sources dqtasheet be set right on top of the detector. I especially like the plated through holes, which are fantastic for prototyping if you have to remount components several times.

I had to jump!

National Semiconductor

The JTAG fuse comes set, which makes some pins start up set high. I do that sort of thing all the time, and I have had no problems. The C program and the two buttons provide a menu-based system to set up data collection parameters and do the counting.