Support
Everything you need to get the most out of your Jolly Logic products.
Letting them run completely flat or leaving them unused for more than a couple of months may damage the battery. This applies to all lithium battery devices, including phones and tablets.
User Guides
PDF guides for AltimeterOne, AltimeterTwo, and Chute Release — current and legacy versions.
Repairs
Visual repair guides for altimeters and Chute Release, plus replacement parts in the store.
Mounting
The Snap Mount is ideal for payload bays and struts. Fishing-line tether works too.
Contact
We try to respond quickly. Email support@jollylogic.com for product help.
Frequently Asked Questions
The battery level on my altimeter seems to jump around a lot. What’s going on?
In versions of AltimeterOne prior to 3.02 and AltimeterTwo prior to 5.01, a fully-charged battery would sometimes read incorrectly low (like 42%) if it was turned on with a long button press. The problem wouldn’t occur with a quick press to turn it on. That odd behavior has since been eliminated, but if you have an older version, try turning it on with a quick click.
Can I use AltimeterTwo for something other than a rocket?
No. AltimeterTwo only works on rockets.
Can I use AltimeterOne for hiking or other non-flying activities?
Not really. Because our products were specifically designed for flying hobbies, they are unlikely to behave the way you’d like for other activities. For instance, if AltimeterOne doesn’t sense certain flight activities, it will automatically turn off after one hour. Also, all of our products report altitude above where they were turned on, not altitude above sea level. So if you turn them on at the top of a 1000 meter hill, they will report that altitude as “0m,” not “1000m.”
What’s the best way to attach an altimeter?
The Snap Mount is great if you have room for it in a payload section, or if you have a strut you can Velcro it to.
For rockets, you can also use strong braided fishing line, as shown in this video.
My altimeter seems dead
Help! I haven’t used my altimeter in a while and it’s dead.
If the red charging light comes on when you plug it in to charge, but you can’t turn the altimeter on when it is unplugged, you need a new battery. Lithium batteries always wear out over time, especially if they are not used and frequently recharged.
If you do NOT see a red light when you plug your altimeter in, it is not getting power. Common causes:
- Your computer (or charger) is turned off
- The altimeter is plugged in upside down (older versions; newer cable prevents this)
- The altimeter is not pushed in far enough (older versions)
- Your cable is faulty
The newest generation of products use a Micro-B USB cable (included). For older cable-less versions, a Type A USB extension cable can help if the port fit is poor.
How do I use AltimeterOne and AltimeterTwo?
- Hold the button down until you see “Launch” (“0000” on older versions) to clear the display.
- Attach the altimeter to your rocket, plane, kite, hunting falcon, or whatever you’re flying.
- Make sure the altimeter is exposed to outside air pressure — add small ports if it’s in a sealed bay.
- Launch!
How do I recharge my altimeter?
- Plug the altimeter into any standard USB port (computer, printer, USB charger).
- You’ll know it’s recharging when you see a red light glowing.
- When charging is complete, the light will turn green.
You’re ready to go!
User Guides
Current versions
AltimeterTwo User Guide (64G Edition)PDF · current generation
Chute Release User GuidePDF
Pre-2014 versions
Repair Instructions
Altimeter Visual Repair GuidePDF · cases, battery, LCD
Pre-2014 Repair InstructionsPDF · soldering-era models
Battery Repair ServiceFor older altimeters that need soldering
You can purchase replacement cases, batteries, and LCD displays in the Jolly Logic webstore. Current models have snap-in batteries and displays. For older models (made before 2014) you’ll need to be handy with a soldering iron, or use our battery repair service. Please read the repair guides before purchasing parts.