New speed shooting trainer / timer.

My brother has build a new version of his speed shooting trainer / timer.

The hardware are improved on the following areas:
a) a large clear blue/white back lit LCD display,
b) a more powerful buzzer with option to disable it,
c) new possibility to connect external equipment eg. a red and green signal lamp,
d) and option for an external 12V power supply.

The control software is improved with a 250 times repeat function in all training modes, very useful if you want to repeat the same discipline over and over.

As with old version you can use the speed shooting trainer / timer to practice:
1) speed shooting, measuring (with a microphone) the time between 5 shots fired as fast as possible,
2) 25 meter standard pistol,
3) 25 meter sport pistol,
4) Terrain pistol.
Below you can see some pictures of the design (click on the picture to enlarge it):

Updated! The speedtimer schematic.
The empty main pcb.
The mounted main pcb, in the new version. The new speed shooting trainer/ timer is controlled by a 18F1320 PIC Microchip just like the old version. Updated! Firmware now in version 6 with these enhancements: 1) In sport shooting mode: "Wait" text changed to "Ready" and "Finished" text changed to "Stop" 2) Program changed so that the speedtimer can measure up to 999 seconds and 999 milliseconds 3) Program changed so that the speedtimer can measure the total time for up to 99 shoots 4) Program changed so that the speedtimer shows the five first time measurements and the last time measurement 5) The red and green output signals have been synchronized, so for example when the shooting command changes from red to green the red signal turns off at the same time as the green signal turns on.		pcbfile updated 2009.09.28
Updated! User manual for the new speed timer now in version 6.
Updated! The speedtimer front schematic.
The empty front pcb.
The front pcb with a 2x16 character back lit blue/white LCD display.		pcbfile updated 2009.09.28
The potentiometer is mounted directly on the pcb, like this.
Here is a picture of the "sandwich" front construction.
This is the buzzer pcb.
The buzzer pcb, now with a much more powerful buzzer, which makes it easier to hear the beeps with your hearing protectors in place :-)		pcbfile updated 2009.09.28
The connector pcb.
The connector is also a new feature, which makes it possible to add extra external equipment eg. a red and a green signal lamp.		pcbfile updated 2009.09.28
The microphone pcb.
The design use a standard condenser microphone, actually we are a bit worried that the microphone will break some day, due to the high sound pressure, but who can tell?		pcbfile updated 2009.09.28
Updated! The speedtimer back schematic.
This is the assembled back plate with all the connector and sound pcbs in place.
The aluminum front of the finished apparatus.
The speedtimer in operation, the display is very bright and nice.
The inside of the finished apparatus, is has been equipped with a 9V Ultralife lithium battery to ensure a long operating time before it is necessary to change battery.
Small schematic showing how the internal 9V and the external 12V wiring are connected. It is important that you follow this to avoid exploding batteries etc.
A look at the finished back side.
Download the cad files used for the enclosure, you will also find enclosure model and type in the zip file.		CAD files updated 2009.09.28

This page was last updated 2010-02-18.