# Solenoid Actuation Circuit for Hocky Robot - High speed, Maximum force

I am working with students designing and building small competition robots. We have done quite well but I am having trouble with the design of a circuit to actuate a solenoid to quickly launch a 4 inch hockey puck. We are currently using an ESP to provide 24 vdc to the solenoid, but I would like to find an appropriate circuit to interface the RC receiver output to control the solenoid. The solenoid has a 1.25" stroke and rated at 12V. The coil measurements are 1.25mH at 1.6 ohms. The utimate goal would be to use 12 vdc for the system and get the absolute maximum speed and force from the solenoid (without letting the smoke out of the components). An explanation of the functional aspect of the circuit would also be valuable to the students,and me, as well. I have seen some examples that use a capacitor in a circuit, but I am open to any suggestions. Thanks, in advance, to all for your help! This is my first post!

• Please provide links to the manufacturers' datasheets for the "RC receiver" and the solenoid. We need to see their electrical specifications and limits. Commented May 19, 2021 at 19:56
• A solenoid is very inefficient as a motor, ie turning electrical energy into kinetic energy, you may want to consider other types of motor, unless of course it's the maximum 'using a solenoid' that's important. The solenoid will be thermally limited, so can be overloaded momentarily many times over without damage, as long as the duty cycle stays low. That's often the purpose of a capacitor in the circuit, to be charged up and then dump its stored energy into the solenoid. Interface from RC rx is trivial, once you have the data sheet. Commented May 19, 2021 at 20:27
• I have been playing with 12V solenoid door lock and surprisingly found that its response time is ONE SECOND!: chat.stackexchange.com/transcript/123411/2021/4/25 Commented May 20, 2021 at 2:02
• Maybe consider using a gear motor to wind (or compress, or bend) a spring and then releasing it with a solenoid latch (sear-like) mechanism. Commented May 22, 2021 at 4:04