if you don't have the irfp250 ' s you can use a couple of semiconductors that have a vds almost 4 times the power supply and r (ds) on 150mohm. power supply must be able to supply  several amps (more than 10) circuit ideated by vladimiro mazzilli
如果你没有irfp250那你可以使用的各种半导体产品具有VDS的近4倍，电力供应和R上150mohm（DS）的夫妇。电源必须能够提供几个安培（超过10）电路由弗拉迪米罗mazzilli ideated