aNThiCu/AirsoftETU8The code for a airsoft MOSFET board that includes the trigger , active break mode and semi-auto,full-auto detection.
ElectronicTriggerUnit is an open-source printed circuit board by aNThiCu, from the aNThiCu/AirsoftETU repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 44.4 × 29.3 mm with 36 parts on 30 nets, routed with 184 tracks and 64 vias.
It is built around the LM1117MP-5.0, LC191PTDT and XL-2012IRC-940, with the LKIR30102C-A01(DY) and LKPT30102B-A01(DY) among its other parts. Its parts include 11 resistors, 6 capacitors, 6 transistors, 5 ICs and 4 diodes. It belongs with the robots and motor control boards and the AVR (ATmega, ATtiny) boards of this library.
This is the latest stable version that currently works on my airsoft replica without any problems.
Development was stalled for a while because of a high speed motor that drew a ton of amps on start-up , frying some of my mosfets randomly. Low TPA motors (11 TPA in my case) are not advised for this ETU version for multiple reasons:
-random failure of mosfet
-if the battery doesn't have enough discharge rate the microcontroller will restart on trigger pull
voltage drop too big for LDO to work.Even though there is a PMOS for active brake , i do not use it in my code for this version as i want to get a perfect NMOS only version first. You can just ignore the parts linked to the active brake feature , list of references:
-R9,R7,R8
-Q5,Q8Diode for flywheel protection is not necessary , i personally don't use it because i haven't had time to test the diode with the new motor, old motor always made it go up in flames , had better chances of survival without it. Serial communication for easier debugging doesn't work for now.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R5, R10, R11 |
| 3 | 10n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C4 |
| 2 | 1uF | Capacitor_SMD:C_0402_1005Metric | C7, C8 |
| 2 | 2.2k | Resistor_SMD:R_0402_1005Metric | R8, R9 |
| 2 | 680R | Resistor_SMD:R_0402_1005Metric | R3, R6 |
| 2 | Jumper_3_Open | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2 |
| 2 | LC191PTDT | SamacSys_Parts:AP1608P1CP22 | Q1, Q4 |
| 2 | XL-2012IRC-940 | SamacSys_Parts:LEDC2012X105N | LED1, LED2 |
| 1 | 12v | SamacSys_Parts:Copper_pad | U2 |
| 1 | 1k | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | 1u | Capacitor_SMD:C_0402_1005Metric | C3 |
| 1 | 2N7002 | SamacSys:SOT96P240X120-3N | Q5 |
| 1 | 4.7R | Resistor_SMD:R_0402_1005Metric | R7 |
| 1 | 4.7k | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 78-SQRS140ELP | SamacSys_Parts:POWERPAKSO-8 | Q3 |
| 1 | ATTINY816-MNR | SamacSys_Parts:QFN40P300X300X90-21N | IC3 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | D | SamacSys_Parts:SBR3U60P1Q7 | D2 |
| 1 | Gnd | SamacSys_Parts:Copper_pad | U4 |
| 1 | GndMotor | SamacSys_Parts:Copper_pad | U3 |
| 1 | LKIR30102C-A01 | SamacSys_Parts:APA3010P3C | LED4 |
| 1 | LKPT30102B-A01 | SamacSys_Parts:APA3010P3C | Q2 |
| 1 | LM1117MP-5.0 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U5 |
| 1 | SI7149ADP-T1-GE3 | SamacSys_Parts:POWERPAKSO-8 | Q8 |
| 1 | Trigger | SamacSys_Parts:463092691402 | S1 |
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KenwoodFox/SuperGauge
This repo contains all the firmware and hardware for the SuperGauge.
It measures 44.4 × 29.3 mm and has 2 copper layers, 1.6 mm thick.
36 parts, built around the LM1117MP-5.0, LC191PTDT, XL-2012IRC-940 and LKIR30102C-A01(DY). The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the aNThiCu/AirsoftETU repository on GitHub, at the commit this page was made from: the board is ElectronicTriggerUnit_PCB_Files/ElectronicTriggerUnit.kicad_pcb and its schematic ElectronicTriggerUnit_PCB_Files/ElectronicTriggerUnit.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).