Abra AK-10 User manual

AC/DC Power Supply Kit
DC: 0 - 18 VDC, 1A
AC: AC: 18 VAC, 1A
www.abra-electronics.com
sales@abra-electronics.com
U.S Toll Free: 1-800-717-2272
Can. Toll Free: 1-800-361-5237
• 18 Volts AC output and a Variable 18 volts DC output
• Up to 1 Amp in current output
• Simple component placement guide
• On -O switch to save power when not in use
• Detailed theory on Power electronics
AK-10

1
Index
I. Parts list ...........................................................................1
................................................................2
............................................................2
..........................................3-4
.....................................................4
..........................................5-12
I. ................................................................. 5-7
...................................................... 8-9
............................................................... 10
.............................................................11
.................................................11
................................................................12
................................. 12-13
.................................................................. 14
Designed by: ushanth Sithambararajan
Rev 1.0.1
Parts list
☐
☐
☐
☐
☐
☐
☐
☐LM317T
☐
☐
☐
☐
☐
☐(6x) 1N4004 (D1 – D6)
☐
optional

2
18 volts adjustable DC
Specs
Tools Required
•
•
•
•
•

3
Assembly Instructions

4
Schematic diagram

5
Thoery of Operation
Ac Signal

6
Note:
-

7

8
Transformers
wire.

9
Dual output transformer (series connection)Less
current more voltage

10
Rectifiers
s

11
Capacitors
Voltage Regulator

12
Soldering
Troubleshooting / FAQ
The LM317 is overheating?
IC.
I have no voltage output.
The transformer is overheating.
My Led won’t light up but I am getting power.
My led won’t light up and I am not getting any power.

13
Can I use an alternative transformer?
Can I change the capacitor values around?
Why is C2 circle so big?
Where can I mount this?
Do I need a heat sink for my LM317?
Can I change the heat sink for a bigger one?
What version is my power supply?
What happens if I scratch the surface and I see copper?
tape.
Why am I getting more than 18 volts?
Which pin do I connect for the potentiometer?

14
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