Eggtimer Rocketry Eggtimer User Manual page 2

Eggtimer Features
Altimeter rated to 29,500 ft ASL, resolution to approx 1 ft.
Logs data for last 32 flights, "beeps" out maximum altitude of last flight
Flight data can be downloaded to a computer using USB interface cable (included) to .CSV format, for
use with virtually any spreadsheet, graphing, or statistical analysis software package
Reports Elapsed Flight Time, Altitude @ Time, Raw Velocity @ Time, and filtered Altitude and Velocity
@ Time
Flight memory is non-volatile, so all settings and flight data are retained with the battery disconnected,
and interrupted flights can still produce a data graph
Fully configurable flight parameters including sampling rates, deployment time/altitudes, etc.
Eight pre-programmed flight profiles, so you can select commonly-used flight profiles in the field without
needing a computer
Will work with any 3v-4v power source: 3v lithium batteries, two 1.5v alkaline batteries, 3.6v NiMh
battery packs, or 3.7v LiPo batteries
Two programmable deployment channels: Main and Drogue/Airstart. Supports two-stage multiple-
deployment flights using motor ejection for booster recovery and second-stage drogue deployment
Three logic-level outputs, triggered at nose-over, Main deployment altitude, and landing detect
Supports igniters with a voltage rating of up to 60V, up to 8A, 65W maximum
Deployment outputs also support standard analog PWM hobby servos for non-pyro deployment
Uses optoisolators and bipolar driver transistors for total isolation of computer and ignition power and
immunity from false ESD or RF triggering and "brownout" protection
Uses separate battery (not included) for external deployment device; each channel can have a separate
battery so servos and igniters can be mixed
Breakwire support for arming Airstarts, 3-factor triggering for safety
Supports remote Power and Reset/Hold switches, and remote Ready/Buzzer indicators
Outputs for external igniter continuity LEDs, current-limited
Programmable using standard VT100/ANSI text terminal programs, compatible with virtually all
computers (PC, Mac, Linux)
Firmware can be updated from a standard PC using the serial cable
Weight about 20 grams, size approx. 3.9" x 1"; fits in 29mm engine tube or BT-55 body tube
- 2 -