This power supply is easy to build and fun to make. It will have 2 meters 1 for voltage and 1 for current. They will both be DC voltmeters, for the amp meter we will use a shunt resistor.
Here’s the part list:
Qty |
Name |
All Electronics Cat# |
Sub-total |
total |
1 |
LM317T Adjustable regulator |
LM317T |
$0.70 |
$0.70 |
1(Min qty is 10) |
270Ω ¼W resistor |
291-270 |
$0.065 |
$0.65 |
1 |
5k pot |
NLTP-5K |
$0.75 |
$0.75 |
1 |
Voltage knob |
KNB-125 |
$0.50 |
$0.50 |
2 |
Spring terminals |
SWT-202 |
$0.50 |
$1 |
1 |
24VDC WALL WART |
PS-2414 |
$8.45 |
$8.45 |
1 |
Bridge Rectifier |
FWB-14 |
$0.40 |
$0.40 |
1 |
3300µF Capacitor |
3300R50 |
$1.60 |
$1.60 |
1 |
1Ω 50W Resistor |
1-50 |
$2.75 |
$2.75 |
1 |
20V Voltmeter |
PM-120 |
$15 |
$15 |
1 |
200mV Voltmeter(current) |
PM-122 |
$15 |
$15 |
2 |
+5VDC Regulator |
7805T |
$0.50 |
$1 |
1 |
Fuse holder |
FHPM-31 |
$1.25 |
$1.25 |
1 |
1A Fuse |
FS-1 |
$0.75 |
$0.75 |
|
Sub-total |
|
|
$49.80 |
|
Shipping |
|
|
$8 |
|
Total |
|
|
$57.80 |
Circuit Simulator