I try to make Flexible Shaft Dremel Tool With 12V 15A Switching PSU. I use 775 motor, 30A DC motor speed controller,12V 15A Switching PSU. At here I will tell you detail about of 30A DC mottor speed control and 2V 15A Switching PSU.
You can download all file here PCB,Schematic,Gerber file for you can order PCB online. I alway upload gerber file to JLCPCB.COM for get PCB with only 2$for 10PCB
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.
Step 1: Make 12V DC Motor Speed Controller
I had video and instructable about 24V DC Motor Speed Controller. You can check here. But the great thing it can run with 12V for 12V DC motor with little bit modify. Look the picture and schematic i had modify for run at 12V. At my project i use mosfet irfp240 without heatsink when run 775 motor at max speed it warm. You can use IRFz44 or IRF3205 but need small heatsink
The Schematic, PCB,Gerber file you can download here and make it by yourself but for easy way. You can send Gerber file to JLCPCB.COM for order PCB. It take only 2$ for 10PCB with high quality. Look the picture about PCB from JLCPCB.COM i had order from them
List of part:
irf 3205 ( z44,75n75...irfp240 ) x2
diode fr307 x2
capacitor 102 x2
transistor c1815 x2
transistor a1015 x2
POT VR 10k
resistor 10k x3
resistor 5k1 x 3
small heatsink for lm7812 if run at 24V
small heatsink for 2 mosfet ( can take from old PC powersupply)
for more detail copy and paste to google image search
Step 2: Make 12V 15A SMPS From OLD PC Power Supply
I have video and instructable about it you can check here. But the output is 24V so we need modify little bit for make 12V output. Normally. A transformer without CT PIN of PC PSU had 2 output voltage 12V, 5V ( 3.3V take from 5V pin). For get 24V we use 12V output pin and for get 12V we choice 5V pin. You can download the Schematic, PCB gerber file for make by yourself. For easy way you can upload my gerber file to JLCPCB.COM for get good PCB with high quality only 2$for 10 PCB