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Description
Geiger Countersku: SEN 10742 We've revised the Geiger counter once again, this time replacing the switch with a more robust right angle switch. This version also includes the necessary capacitor to support Arduino's auto reset feature. This USB powered Geiger Counter is equipped with an ATMega328 that can be programmed in circuit using one of the programmers below. Simply plug the unit into USB (make sure you have FTDI drivers installed), open a terminal program to
sku: SEN-10742
We've revised the Geiger counter once again, this time replacing the switch with a more robust right angle switch. This version also includes the necessary capacitor to support Arduino's auto-reset feature. This USB powered Geiger Counter is equipped with an ATMega328 that can be programmed in circuit using one of the programmers below. Simply plug the unit into USB (make sure you have FTDI drivers installed), open a terminal program to the correct COM port at 9600bps, and you will see random bits being generated from the random background radiation. Each bit generated (actually an ASCII byte, 0 or 1) represents an actual event in the tube in real-time, so the output can be used to deduce CPM or what ever units you need. Here at SparkFun, on average, we get about 25 counts a minute.
Check out the random number generating Geiger counter tutorial for more information.
Also, check out the live Geiger Counter feed from SparkFun headquarters.
Note: While the Geiger counter is powered and the switch is in the ON position, the board contains exposed high voltage components. In order to turn the unit off, you must flip the tube power switch to OFF while the USB cable is plugged in or while the board is still connected to your power supply. The reason being; when you move the switch into the OFF position, the high voltage lines are bled out through a resistor connected to ground, more information on this is in the tutorial.
A project box or enclosure is suggested. Do not touch the end window of the Geiger tube and do not to touch any conductive region inside the area marked HIGH VOLTAGE when the Geiger tube is powered ON. An enclosure is not absolutely necessary, but if you choose not use an enclosure, remember to be extra careful with the end window and high voltage regions.
The Geiger tube comes with a red boot to protect the end window during production, handling, and shipping. The boot should be removed if you need to detect alpha particles. However, you should still see activity from gamma and beta particles even with the boot on.
We do not ship this product to Cuba, Iran, North Korea, Sudan or Syria.
Note: This product is for educational purposes and should not be directly relied upon for determinations regarding one's health or safety.
WARNING : This product contains high voltage. Do not touch board when it is switched on.
Features
- 5V@30mA input
- LND712 Geiger tube
- ATMega328
- FTDI USB
- Power and status LEDs
- TTL output pin from tube
Dimensions: 4.15"x1.75"x1" (without standoffs)
Documents
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4.3 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
Great value!
Actually fits the hub better than the OEM cap.
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Reviewed in the United States on September 2, 2024
★★★★★ 5
Good buy and good replacement for stock
I can’t keep these on my UTV, so it’s good to find a reasonably priced alternative.
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Reviewed in the United States on August 17, 2024
★★★★★ 5
Definitely keeps your hands warm !!
Color: Black
These fit nicely on a H.D. Road King. If you bike has heated grips you can drive in 30 deg F weather with only a thin pair of leather gloves.
Update: They kept our hands toasty with the heaters on Level 2 and just wearing a thin pair of leather gloves (for grip) while riding in temps down in the low 30's, high 20's. I would definitely recommend these... the photo in the ad is pretty indicative of how they fit on handlebars. They're really designed for ATV's that have no turn signal lamps on the handlebars. Without modification, they do cover the handlebar mounted turn signals on a Sportster, but not on a Roadking. The draw string that seals the mittens around the handlebar could have a more positive grip to stay closed... we wound up double tying it around bar and that works great. The thing we like most aside from how warm they are (the lining feels great)... is that the cuffs are fairly rigid and don't collapse when you take you hands out (like the photo) which makes it super easy to pull you hands out and put 'em back in again. That's really important at a stop light, but even more important when flying down the road at highway speeds... you just can't afford to be fooling around trying to thread your hands and a coat sleeve back into mittens that are limp and flop down closed when you take you hands out...
I hope this help... be safe !!
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Reviewed in the United States on January 4, 2020
★★★★★ 5
Great
Color: Black
Great choice for outdoor activities.. warm.. fits well.. love the look and design… waterproof
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Reviewed in the United States on December 27, 2025
★★★★★ 4
If your hands are cold or wet after knowing these handlebar covers exist, well, that’s on you.
Color: Black
These atv gloves, mitts, handlebar covers, whatever you want to call them are a fantastic value. I was honestly surprised at the quality of construction. They have a soft comfortable cotton lining that seems to really hold heat from your hands. The cordura outside is super strong and the seams are very well done. There is a zip along the inside bend to allow for expansion over bigger controls to to allow for use with heavier gloves. (Just leave it unzipped) The draw string to tighten and secure the end to the handlebar is easily to operate and keeps everything snug and in place. It takes about 5 seconds to put each side on or take off. The draw string on the covers is about 5 times longer than necessary and I ended up cutting a foot or so off.
The down side of these is how snug a fit they have to the contour of the handlebars and controls. The material is pretty stiff, so you have to be careful. I was getting back on my Polaris 570 after stopping and I typically just leave my fourwheeler in high, so when I leaned forward on my handlebars the covers were stiff enough to push my throttle. Thank goodness nothing was in front of me, or was around to witness my panic. Ha. If I turn to sharply I have to be mindful of the material pressing against my hand and thus the throttle. It does Unzip at the elbow of the covers, but the seams are so stiff there is still resistance. I wish there was a softer material at the hand and bend, however the rigidity really makes it easy to slide your hands/arms (5’8” with alligator arms and they just about come to my elbows) in and out easily, even with a heavy coat.
They are indeed 100 waterproof, as unfortunately tested on 2 occasions. They are 112% windproof and I can comfortably ride all day at 35-40 degrees with no gloves(I live in west Alabama so sub 40 degrees is cold for me.) They have been an absolute game changer for the early morning drive in at the hunting club. They are a little stiff for sharp turns on wooded trails, but I expect they will soften with use.
Be mindful of the throttle and KNOW YOUR CONTROLS as they will be covered, but do yourself a favor and get these. If your hands are cold driving your fourwheeler after knowing these exist, well, it’s your own fault.
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Reviewed in the United States on January 18, 2021