RCET 004: Understanding Digital Servos
Al Tejera discusses what makes a servo “digital” and separates the “hype” from the truth. In this discussion he goes into depth giving an intuitive explanation on how the receiver signals the servo to turn. He goes into the core differences on how digital servos get their performance and why.
Listener Questions:
One of our listeners Jeff Maruschek won a free tiny Ultra-Micro Camcorder (see amazing videos)valued at $49.99 by writing in a 3 part question concerning optimum servo resolution, ESC resolution, and wants to know a procedure for adjusting travel, servo throws, and linkage ratios. Al Tejera gives a definitive answer along with a sound procedure for maximizing mechanical advantage and resolution.
Links:
Great printable info from Futaba about digital servos with pictures!
Our Sponsor is:
Tejera Microsystems Engineering Inc. makers of the new Xtrema xG Balancing Charger and the SmartSmoker Smoke Pump
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Podcast: Play in new window | Download (11.3MB)
RCET 003: MORE POWER from your Electric Motor
Al Tejera shows you how to use the magic of the power formula Watts = Volts X Amps to get more power (or more run time) from your electric motor. He discusses how changing pitch and diameter affect power and also how changes in battery voltage affects power and run-time.
Links:
A rule of thumb for power conversion of glow to electric motors is to simply multiply the engine displacement by 1000 or 2000 to get approximate watts for that size motor. Ex: 60 size engine = 0.6 cu in X 1000 = 600 Watts or 0.6 X 2000 = 1200 watts for the high end.
A simple rule of thumb for picking the proper motor power for specific size plane can be found here along with other useful ways to use a watt-meter
To save money when experimenting with motors, props and batteries two great programs you can use to play “what if” games are MotoCalc and the Scorpion Calc over at www.Innov8tiveDesigns.com
A written pdf covering both part I and II of the basics in electronics may be downloaded here.
Our Sponsor is:
Tejera Microsystems Engineering Inc. makers of the new Xtrema xG Balancing Charger and the SmartSmoker Smoke Pump
Click play button below to play here…
Podcast: Play in new window | Download (11.0MB)
RCET 002: Basics of Electronics – Part II
Al Tejera continues covering the basics in this second RC Electronics Podcast. Going a little further into DC electronics he discusses common battery ratings like mAh (milli-ampere-hour) and maximum C charge and discharge rates as applied to lithium polymer, Nickle Cadmium and Nickle Metal Hydride batteries.
Now that the basics are covered the show will feature a quick single electronics tip that will benefit anyone interested in RC. That means we won’t just be covering electric power systems but instead we will discuss a variety of topics like glow starters, servos, ignition systems, power distribution systems, speed controllers and more.
A written pdf covering both part I and II of the basics in electronics may be downloaded here.
We mention our friends at the ATTF and InsideHeli podcasts at www.allthingsthatfly.com
Our Sponsor is:
Tejera Microsystems Engineering Inc. makers of the new Xtrema xG Balancing Charger and the SmartSmoker Smoke Pump
Click play button below to play here…
Podcast: Play in new window | Download (9.8MB)
Posted: February 26th, 2010
at 5:43pm by Al Tejera
Categories: RC Electronics Tips
Comments: No comments
RCET 001: Basics of Electronics
In this new podcast we look at the ground level electronics knowledge you need to advance in RC. We start at the basics so that all our listeners will have the same understanding of Volts, Amps, Ohms and Watts. The classic water analogy is used to describe these terms in an intuitive way.
A written pdf covering both part I and II of the basics in electronics may be downloaded here.
We mention our friends at the ATTF and InsideHeli podcasts at www.allthingsthatfly.com
Our Sponsor is:
Tejera Microsystems Engineering Inc. makers of the new Xtrema xG Balancing Charger and the SmartSmoker Smoke Pump
Click play button below to play here…
Podcast: Play in new window | Download (7.1MB)
Posted: February 3rd, 2010
at 2:42am by Al Tejera
Categories: RC Electronics Tips
Comments: No comments
