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Multi Purpose Rotary Machine - Mulling, Welding, Pottery, Photography Turntable

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Step 21: Motor Control #7 - Components List & Acquisition Notes

Picture of Motor Control #7 - Components List & Acquisition Notes
salvaged electronic components.jpg
salvaged parts.jpg

When I make a project like this I get a lot of the components from old circuit boards. Although individually cheap they add up in cost, and waiting for delivery is a pain.

To de-solder lots of them QUICK I use a hot air gun and pliers - it's not gentle and I wouldn't recommend it for things you really care about (it can overheat components) but it's effective! The exception to this is resistors! They are used so often, and are so cheap that having a stack of new ones of known values saves a huge amount of time. I still salvage and use power resistors (1W and up) though.

To use capacitors that you salvage, put them in parallel (simply add capacitance together) to make up the required cap value (two or more capacitors in parallel is usually better that one higher value cap anyway).

The codes below refer to the schematic by Saulius Bandzevičius on step 17 (when I get the time I will draw out the schematic of the circuit I actually ended up creating, but this is very close)

I used Perfboard to mount the components - I still think its the best way to make one off prototypes you plan to put to use!

R1 3k3 (for all the resistors apart from R14 consider getting a 1/4W resistor pack like this - it's too much work to salvage loads of small resistors, and once you have a pack it will last you for lots of projects)

R2 2k2

R3 4k7

R4 470

R5 100k

R6 10k

R7 30k 0.5W

R8 30k 0.5W

R9 10k

R10 1k

R11 360

R12 360

R13 470

R14 100 5W

C1 220nF (salvage all caps if you can - they add up in cost quickly and are easy to salvage)

C2 100nF

C3 47nF 600V

C4 100nF 600V

C5 3300uF 10V

C6 100nF

D1 1N5817 schottky diode

D2 Any full diode bridge 400Vmin.

D3 1N4007 diode

D4 BTA26 (although BTA16 is enough for this motor)

Q1 S8050 or any npn switching transistor from 0.7A and 20V

U1 LM393 - Datasheet and application notes

U2 PC817 Optocoupler

U3 MOC3023 Optocoupler

U4 Arduino Nano V3 complete board

PS1 Any suitable 5V power supply.I used an old mobile phone charger

F1 6-10A fuse F2 0.5A fuse

K1 Any 5V relay with 10A/250V contacts

SW1 Dual 10A 250V switch with indication lamp

SW2 Rotary encoder with push button

SW3 3 positions switch

16x2 HD44780 LCD display with I2C serial interface module