LM2596HVS modules - http://www.elenblog.ru/LM2596HVS The electric mare in the motor wheel controller uses approximately the following power supply connection to power the logic: 54 V is supplied through a resistor of several ohms to the LM317, which forms 12-15 V, which are necessary to open the 75n75 transistors. Then 12-15 V is reduced by 7805 to 5 V, from which the microcontroller, Hall sensors and other logic are powered. I also want to have 5 V to power the flashlights, and perhaps a charger for the phone. Since linear stabilizers are used, all excess is released into heat. For example, if you need to get 5 V 100 mA from 54 V, then 4.9 W goes into heat every hour, even when you are not riding an electric bike. Therefore, there is an idea to get 12-15 V not with a linear stabilizer 317, but to use a pulse step-down DC-DC step-down stabilizer for these purposes. Losses should be reduced by 10 times. But there are other problems, for example, if the DC-DC step-down burns out due to poor reliability, then there is every chance that at its output, where we need 12-15 V, there may be all 54, with the corresponding consequences....... There are several solutions to this problem, and this is not a problem at all, a trifle, but the fact that LM2596HVS designed for up to 60 V die at 55 V is already a problem...... The tools I use: The best multimeter for repairs. NOT expensive - http://www.elenblog.ru/DT9205A (REVIEW - • The best multimeter for repairs. NOT ex... ) The best tweezers - stainless steel - http://www.elenblog.ru/NO_Titanium_Tw... (REVIEW - • Tweezers from China for small jobs. TITANIUM? ) Super solder from China. MECHANIC 63/37 - http://www.elenblog.ru/Mechanic_63-37 (REVIEW - • Super solder from China. MECHANIC 63/37 ) NC 559 (flux from China) - (REVIEW - • NC 559 (flux from China)) Atten SS 50 ceramics or nichrome? - http://www.elenblog.ru/AT_SS-50 (REVIEW- • Atten SS 50 ceramics or nichrome? ) Soldering mat - http://www.elenblog.ru/Soldering_Plat... (REVIEW- • Soldering mat to protect the table ) Chip Soldering Heater - http://www.elenblog.ru/SAIKE8858_sold... (REVIEW- • Chip Soldering Heater ) Alcohol bottle - http://www.elenblog.ru/Bottles_30ml (REVIEW- • Saving Alcohol When Cleaning Boards ) WOWSTICK Cordless Screwdriver - http://www.elenblog.ru/Wowstick_A1 (REVIEW- • WOWSTICK Cordless Screwdriver ) High-quality LAOA solder - (REVIEW- • Solder from China. Good but EXPENSIVE. LAOA ) UT71E high-precision digital multimeter - http://www.elenblog.ru/UT71E (REVIEW- • UT71E high-precision digital multimeter... ) GOPHERT CPS 3205 Power Supply - http://www.elenblog.ru/GOPHERT_CPS-3205 (REVIEW- • GOPHERT CPS Laboratory Power Supply... ) CPS 6011 Power Supply - http://www.elenblog.ru/CPS-6011_60V_11A (REVIEW- • CPS 6011 0-63V, 0-11A Laboratory Power... ) TS100_65W Soldering Iron - http://www.elenblog.ru/TS100_65W_Sold... (REVIEW- ) 8 Different Tools for Phones - http://www.elenblog.ru/8_In_1_Repair_... (REVIEW - • Tool for phones) 15 different tools for phones - http://www.elenblog.ru/15_in_1_Openin... (REVIEW - • How to Open a Phone? (tool for ... ) BGA clamp - http://www.elenblog.ru/BGA_Holder (REVIEW- ) Reballing balls - http://www.elenblog.ru/BGA_Solder_Bal... (REVIEW- • Everything for BGA reballing (BGA flux,... ) Reballing stencils (small set) - http://www.elenblog.ru/BGA_Trafaret_Ali (REVIEW- • Everything for BGA reballing (BGA flux,... ) Cup for reballing balls - http://www.elenblog.ru/BGA_Soldering_... (REVIEW- ) Headphone PLUG - http://www.elenblog.ru/3-5_mm_Plug_Au... (REVIEW- • Headphones, SENNHEISER PLUG 4 pins ) Heat shrink tube (SET) - http://www.elenblog.ru/Heat_Shrink (REVIEW- ) Nippers - http://www.elenblog.ru/Cutter_DX (REVIEW- • #00018 DX - Logic analyzer, 5 ... ) Headphone tail - http://www.elenblog.ru/Cable_Headphone (REVIEW- ) Screwdrivers jackly jk 6089 - http://www.elenblog.ru/Jackly_JK6089B (REVIEW- • #00062 - Screwdrivers jackly jk 6089 ) Suction cup - http://www.elenblog.ru/Suction_Cup (REVIEW- ) Portable OSCILLOGRAPH JINHAN JDS2022A - http://www.elenblog.ru/JINHAN_JDS2022... (REVIEW - • Portable OSCILLOGRAPHY (the agony of choice ...) SMD component tester - http://www.elenblog.ru/MASTECH_MS8910... (REVIEW - • SMD tester MASTECH MS8910) SMD case - http://www.elenblog.ru/AideTek_BOXALL (REVIEW - ) Multimeter probes - http://www.elenblog.ru/Multimeter_Tes... (REVIEW - • Multimeter probes, very thin! ) Plastic cards for disassembly (5 pcs) - http://www.elenblog.ru/Opening_Plasti... (REVIEW - • Plastic cards for disassembly (without c... ) Screwdriver for phone cross PH00 (8800C) - http://www.elenblog.ru/Best_8800С_PH0... (REVIEW - • Screwdriver for phone (8800C) broke... ) • #3 BAFANG copying parts, eliminating noise... - #3 BAFANG copying parts, eliminating ratchet noise Electronics Engineering BLOG (http://ElEnBlog.ru) in: VKontakte - http://www.ElEnBlog.ru/VK Odnoklassniki - http://www.ElEnBlog.ru/OK Twitter - http://www.ElEnBlog.ru/Twitter Instagram - http://www.ElEnBlog.ru/