[[!meta title="EasyTimer"]]
# EasyTimer

This board provides two programmable timer-based pyro channels with tilt
limits.  It is the same size and shape with the same connector layout as
our [EasyMini](../EasyMini) flight computer, and will sell for the same
price.

The IMU used is the same as on TeleMega and EasyMega, allowing acceleration 
based launch detection, and gyro-based tilt limiting.  This means it's 
possible to configure a pyro event for some amount of time after launch,
or after motor burnout, etc, with the possibility of locking out each event
if the rocket is tilted too far away from vertical.

For projects that require staging or air starts, EasyTimer is a low-cost 
alternative to use of our more expensive products, while retaining the safety 
aspects of tilt-limiting.

EasyTimer firmware and associated configuration software is part of the 
[AltOS](../AltOS) suite.

Photos of the first production unit:

<a href="v1/easytimer_v1_top.jpg"> <img src="v1/easytimer_v1_top-thumb.jpg"></a>
<a href="v1/easytimer_v1_smt.jpg"> <img src="v1/easytimer_v1_smt-thumb.jpg"></a>

EasyTimer v1 is available for sale now at 
[Bdale's web store](http://shop.gag.com/flight-computers/easytimer.html) 
and soon from Altus Metrum distributors.

## Features ##

### User View ###

* Two programmable flight state event and timer-based pyro channels with 
  tilt limits
* USB for configuration
* Designed for use with batteries from 3.7 to 12 volts
* 1.5 x 0.8 inch board

## Artifacts ##

This board was designed using lepton-eda and pcb-rnd.

The hardware design files are available from 
[git.gag.com](http://git.gag.com) in the project 
[hw/easytimer](http://git.gag.com/?p=hw/easytimer;a=summary).