DC-DC step up converter PCB-4

Boost converter module to replace MT3608 with a more powerful one. The module is specially designed for use in watches with fluorescent indicators such as IV-3, IV-6 and others. The printed circuit board can be made at home. The board dimensions are 36.5x23.5 mm. The circuit can use any field-effect transistors with drain-source voltage from 55V to 100V. I used IRF3205. A 31k resistor made from two 62k resistors connected in parallel.