RSS Feeds
Case #89: Nathan Loden: Glidden Special Forces Volunteer
Design News Staff -- Design News, September 3, 2006
Looking to paint the town red (or his buddies at any rate), Nathan Loden devised this simple device to detect if the paintballs are traveling at a safe speed (& 300 ft/sec). Consisting of sensor circuitry and a microcontroller with a three digit, seven segment display driver, it detects the presence or absence of a ball by measuring the amount of IR energy striking the sensor, causing a voltage swing detectable by the micro. A timer is set to overload if the number of instruction cycles exceeds a limit equal to 300 ft/sec, indicating safe shooting.
|
||
|
|
|
|
|
|
|
|
|
Get Nathan Loden's complete instructions on how to build your own paintball safety system. |
|
|
||
| Paintball Safety System Parts List | ||
|---|---|---|
| Amt | Part Description | Allied Part # |
| 1 | Voltage regulator, 5V | 568-3101 |
| 2 | IR LEDs | 980-0002 |
| 1 | IR Phototransistor | 980-0165 |
| 1 | Capacitor, 0.1 µF disk | 881-0192 |
| 1 | Capacitor, 0.33 µF disk | 881-0195 |
| 1 | Green LED | 263-1170 |
| 1 | Red LED | 679-9981 |
| 1 | 9V Battery | 774-0940 |
| 2 | 1 Mohms Resistors, 1/4W | 296-0012 |
| 2 | 90.9 ohm Resistors, 1/2W | 296-0083 |
| 2 | 422 ohm Resistors, 1/4W | 296-0032 |
| 1 | 5V Regulator | 263-0136 |
| Additional parts required: PIC 12F675 microcontroller. | ||
Talkback
-
Source code (asm file) located at this...
- 2007-24-5 07:16:31 EDT -
hi!!!!where is the .hex file for the 12f675...
- 2007-1-2 16:16:43 EST -
Parts List shows 2 different voltage regulators and 1 phototransistor. Schematic shows 1...
- 2007-25-1 04:21:13 EST -
There is no sourcecode in the zip...
- 2006-9-11 00:22:08 EST -
The zip file for download doesn't include any...
- 2006-9-11 00:04:28 EST
Advertisement
