Unfortunately Classic Army, CYMA, G&G, and JG all suffer from ultra cheap and low end mosfet ETU systems. These create an extremely frustrating repair for the owner, rightfully fearful of repairing their otherwise totally working platform only for it to burn out again quickly.
I have launched the Shotmaker Optical ETU system to remedy this issue. 95% of marui type gearboxes will be compatible with this mosfet.
This is an extremely potent and capable MOSFET system supporting Hair trigger, Binary, SSG & DSG setups up to 17v.
I really like these ETU’s due to durability, simplicity, and ease of setup.
• Upgraded automotive grade dust and water-proof trigger switch by OMRON
• Hair trigger tunable 10mm down to 1.5mm.
• Require no initial programming and no selector plate or trigger board stickers.
• Physical trigger and selector sensors offer simplicity and tactile feedback, with all the accuracy and benefits of optical gear sensors.
• Can handle up to 16.8v and 50RPS SSG & DSG setups.
• Semi can be programmed to Binary.
• Active Braking technology decreases the response time and speeds up the cycle with even stock setups. (light 20% AB Confirmed safe for T238 Brushless motors)
• Improved thermal efficiency by adding heat sink to POWER Mosfet chip.
• Board insulated from moisture and debris with liquid tape
• GB Lockup/overheat/low battery shutoff protection
• 1yr / 100,000rd. warranty
The lack of programming options compared to a gate or perun some may see as a downfall, but it is also much cheaper, more durable due to less components, and requires no additional installation or programming fees. Others may never notice or need burst and pre-cocking options – This is the next-gen mosfet for you.
The OEM is T238 so the AB has been tested and confirmed safe with all their brushless motors. I have personally tested this ETU with SOLINK and INFINITY brushless motors without issue.
Shooting video to show performance:
Revisions:
1.2: -trigger switch relocated and added pad. This is much more solid and durable than the last design. I had 1 unit fail due to the switch being pushed off the board. This is a permanent solution to this issue.
1.10 – added graphene-oxide coated copper heat sink to N-ch POWER FET. I spent quite awhile selecting this heat sink to maximize thermal efficiency for space. It is 2mm tall allowing all physical safety levers to clear over it
1.05/6 – secured switch with Silicone/Hot Glue
1.02 – removed old switch mount and re-routed wiring from trigger area
1.01 – insulated board with liquid tape
