Wednesday, February 16, 2011

Make finals more interesting

Hello, ISSF!
What do you think, if every finalist becomes heart rate/pulse sensor and actual heart rate value will be broadcast real time together with actual scores. This can be interesting («Wow, look at this guy, he hits 10 with heart rate of 180!»).
The use of heart rate measurement technology in biathlon now moves one-step further, from training to competitions. Several top biathletes are now using the Polar Telemetry System to transmit this physiological data to a PC for use in television broadcasts.

Monday, February 14, 2011

Video lessons – rapid fire pistol shooting basics by Khaidurov

Two video lessons by Efim Khaidurov. Absolute rarity and exclusive. These videos were produced by Soviet Union’s ministry of sport in 1982-1983.
I promise to add annotations in English as soon as possible – so you can understand what is right and what is wrong.

Pistol shooting basics (with annotations in English)

Rapid fire pistol shooting basics (with annotations in English)

Wednesday, February 9, 2011

TOZ-35 free pistol with electromechanical trigger

New project: electromechanical trigger for TOZ-35 free pistol.
Our goals:
  • Get rid of many tiny parts of mechanical trigger no more available today on the market;
  • Learn – how electromechanical trigger might work;
  • Original pistol weight and balance must remain the same as before;
  • Learn something new.
Electromechanical trigger consists of two main parts:
  • Electronic part. Subdivided into:
    • Power supply (rechargeable via USB);
    • Contact key (button, switch, pressure gauge etc);
    • Analog amplifier;
    • Digital converter;
    • Digital analyzer;
    • Impulse generator;
    • Solenoid.
  • Mechanical part – original bolt «as is».
Developers: me and Alexander Exl.

Sun, 13 Feb 2011:
We worked all day on strain gauge, Wheatstone Bridge and Instrumentation amplifier. Seems to be work. Photos a little bit later.
As you may notice – we use strain gauge – no buttons, no springs, no contacts, no trigger movement. Later it must be enough to tune tiny potentiometer to adjust the «trigger weight».

Wed, 23 Feb 2011:
Amplifier with the gain of 10000 in action.

Sat, 26 Feb 2011:
Noise immune threshold circuit has only two states - low and high.

Sun, 6 March 2011:
Trigger hysteresis switching and pull force measured in Volts.

Sunday, February 6, 2011

Clocca 1.1

Minor changes:
  • App will be paused if you have incoming call;
  • Round will be completely restarted on resume;
  • Entered data will be saved on exit and restored on App launch;
  • Fixed: Exception thrown on exit while playing scenario.