TERRA Operative
Jr Member
Ok, so I've just found this site recently and am diving head first into a build with a friend, Metalfr3q.
I, being the electrician by trade, and having access through work to a plethora of microprocessors and general electronic gear, have been tasked with the job of weapons and armor electronics.
This is the list for the Assault rifle so far:
- Strobe light for muzzle flash - PCB 90% finished
- Microprocessor for electronics control and ammo counter - Schematics 90% finished
- Ammo counter count down from 32, with single shot and full auto modes, operating as per the game
- 12V Sealed Lead Acid battery in hand grip for power
- On/Off button in correct location on weapon
- Solenoid (or two pending room inside gun) with weight to simulate recoil
- Reload to be accomplished by removing and reinserting ammo cartridge
- Voice recorder to produce firing sound of the rifle
- Functional LED torch (1W Luxeon or similar)
Technical description ahoy...
I am almost finished drawing up the PCB for the strobe circuit. This will be triggered by the microprocessor so the strobe flashes will be synchronised with the gun firing, the strobe will be capable of flashing up to 20Hz or so, but it will be limited by the firing rate of the rifle. The strobe circuit will be isolated from the rest of the system through the use of a opto-triac, just to be safe. I'll also be adding a bleed resistor to the discharge capacitor so no lingering charge will remain for any period of time.
There will also be a sound/voice recorder that will playback the sound of the gun firing, triggered from the same output as used for the strobe.
The solenoid will be triggered from the same output, but via a darlington pair of transistors, so no relays will be present to click or wear out.
It will have a weight with a spring and a rubber buffer to prevent noise, and the weight will be sized to obtain the maximum effect that the solenoid can produce.
The magazine will have neodymium magnets in the top, so that it 'clicks' into place in the gun against a steel plate in the magazine slide. There will be a reed switch (more reliable than a mechanical switch) that will act to reset the gun when it detects the presence of the magnets (leading edge detection on the switching)
I'll also program the microcontroller to reset the counter to '0' whenever the magazine is removed, regardless of how much ammo is left.
(Should I leave 'one in the chamber' if the magazine is removed with live ammo still in the magazine, as per a real magazine fed weapon???)
I'm also wondering if I should try to put the batteries into the magazine so that the batteries will be replaced every time the magazine is replaced. This will allow for longer run time in total (only limited to the number of magazines you carry), but will necessitate the carrying of extra magazines due to the probably less runtime per magazine compared to the larger SLA battery in the rifle. This extra luggage probably won't be too con friendly. Also the cost for the Ni-Cad or Ni-MH batteries will be more than the single SLA. What do you guys think??
There will also be a discreet recharge port somewhere on the gun, so the internal SLA battery doesn't need to be removed to be recharged. Once the gun is assembled, it won't need to come apart again.
Oh, and I'll be endeavoring to maintain proper weight balance so the rifle is easy to handle. Does anyone know the actual weight of the assault rifle, so I can keep it as close to the real thing as possible?
Also, how is the torch actually turned on? I'll probably use a 'twist the head to turn on' torch, but if there is a button on the rifle for it, I'll wire that in instead. This will be powered from it's own batteries so it doesn't deplete the main batteries.
Let me know what you guys think. Any extra ideas or suggestions? Also, what is the firing rate for the assault rifle in full auto?
Oh, I'll also be posting up all the diagrams and schematics etc as I go, so everyone else who is competent with electronics can have an assault rifle that is fully functional, except for the actual bullets...
I, being the electrician by trade, and having access through work to a plethora of microprocessors and general electronic gear, have been tasked with the job of weapons and armor electronics.
This is the list for the Assault rifle so far:
- Strobe light for muzzle flash - PCB 90% finished
- Microprocessor for electronics control and ammo counter - Schematics 90% finished
- Ammo counter count down from 32, with single shot and full auto modes, operating as per the game
- 12V Sealed Lead Acid battery in hand grip for power
- On/Off button in correct location on weapon
- Solenoid (or two pending room inside gun) with weight to simulate recoil
- Reload to be accomplished by removing and reinserting ammo cartridge
- Voice recorder to produce firing sound of the rifle
- Functional LED torch (1W Luxeon or similar)
Technical description ahoy...
I am almost finished drawing up the PCB for the strobe circuit. This will be triggered by the microprocessor so the strobe flashes will be synchronised with the gun firing, the strobe will be capable of flashing up to 20Hz or so, but it will be limited by the firing rate of the rifle. The strobe circuit will be isolated from the rest of the system through the use of a opto-triac, just to be safe. I'll also be adding a bleed resistor to the discharge capacitor so no lingering charge will remain for any period of time.
There will also be a sound/voice recorder that will playback the sound of the gun firing, triggered from the same output as used for the strobe.
The solenoid will be triggered from the same output, but via a darlington pair of transistors, so no relays will be present to click or wear out.
It will have a weight with a spring and a rubber buffer to prevent noise, and the weight will be sized to obtain the maximum effect that the solenoid can produce.
The magazine will have neodymium magnets in the top, so that it 'clicks' into place in the gun against a steel plate in the magazine slide. There will be a reed switch (more reliable than a mechanical switch) that will act to reset the gun when it detects the presence of the magnets (leading edge detection on the switching)
I'll also program the microcontroller to reset the counter to '0' whenever the magazine is removed, regardless of how much ammo is left.
(Should I leave 'one in the chamber' if the magazine is removed with live ammo still in the magazine, as per a real magazine fed weapon???)
I'm also wondering if I should try to put the batteries into the magazine so that the batteries will be replaced every time the magazine is replaced. This will allow for longer run time in total (only limited to the number of magazines you carry), but will necessitate the carrying of extra magazines due to the probably less runtime per magazine compared to the larger SLA battery in the rifle. This extra luggage probably won't be too con friendly. Also the cost for the Ni-Cad or Ni-MH batteries will be more than the single SLA. What do you guys think??
There will also be a discreet recharge port somewhere on the gun, so the internal SLA battery doesn't need to be removed to be recharged. Once the gun is assembled, it won't need to come apart again.
Oh, and I'll be endeavoring to maintain proper weight balance so the rifle is easy to handle. Does anyone know the actual weight of the assault rifle, so I can keep it as close to the real thing as possible?
Also, how is the torch actually turned on? I'll probably use a 'twist the head to turn on' torch, but if there is a button on the rifle for it, I'll wire that in instead. This will be powered from it's own batteries so it doesn't deplete the main batteries.
Let me know what you guys think. Any extra ideas or suggestions? Also, what is the firing rate for the assault rifle in full auto?
Oh, I'll also be posting up all the diagrams and schematics etc as I go, so everyone else who is competent with electronics can have an assault rifle that is fully functional, except for the actual bullets...
