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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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.
ATtiny26 board / LP regulator – Electronics – Pololu Forum
The HV generator is top right, leading to the connector for the V tube bias red arrow. 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.
The unit is currently monitoring the cosmic background radiation in my office 95 counts in seconds. We would probably buy a few, especially if catasheet footprint was compact. For one low-power project, I have the possibility of powering the board from either a 9V solar cell or a 4.
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. Both have a thin and very delicate metalized membrane for measurement of alpha radiation.
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 especially like the plated through holes, which are fantastic for prototyping if you have to remount components several times.
The rainbow cable leading off screen goes to the two pushbuttons and the LCD. The counter input INT0 is marked with a green arrow. If only the ATtiny26 had a bit more memory… Thanks, Jim. I had to jump!
LP Datasheet UTC pdf data sheet FREE from
There is one error in the published circuit: I do that sort of thing all the time, and I have had no problems. Dagasheet can always use diodes to switch between solar and backup supply, but I thought I could float charge the battery without such trickery. My power supply current-limited at about 1 amp. 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 See below for the exterior appearance.
I expect that the regulator can tolerate this but it might add some unnecessary current drain. There is a small current draw increase at 5. My most recent project with the ATtiny26 board is a Geiger counter. Shop Blog Forum Support. If I connect the 4. Can you try doing the regulator test again? Well, I connected a 4.
In my version, the tube is screened so that small sources can be set right on top of the detector. Is the RS option useful? The program currently occupies out of bytes of program memory.
The board is shown below. Did you look at the datasheet from that company? 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!
By the way, there are a few manufacturers of the part, and your board probably has the one from On Semiconductor.
Not realizing this we designed our main board which uses the pushbutton power switch with one of these connected to the OFF pin. Dahasheet just tried taking a regulator part not on a board and applied from 4.
Thanks for checking on the regulator — maybe I shorted ll2950 power supply while hooking things up. By the way, I really like the board design. Can you tell me what you like about it?
Where did you get your Geiger tube? The C program and the two buttons provide a menu-based system to set up data collection parameters and do the counting.