The PSU power connection can be used with a standard AC transformer or an AC wall wart adapter. It consists of 6 resistors, 17 capacitors, 2 diodes, 2 regulators and 2 terminal grids.
Resistors:
|
|
Resistor 1 (x2) |
Resistor 2 (x2) |
Resistor 3 (x2) |
|
|
Resistance (ohms) |
10 |
1.1k |
100 |
|
|
Tolerance (%) |
5 |
5 |
5 |
|
|
Voltage rating (volts) |
750 |
50 |
350 |
|
|
Power rating (Watts) |
3 |
0.6 |
0.6 |
|
|
Price (£) |
0.608 |
0.092 |
0.106 |
|
|
|
|
|
|
Total: |
|
|
|
|
|
£0.806 |
Capacitors
|
|
Capacitor 1 (x6) |
Capacitor 2 (x6) |
Capacitor 3 (x2) |
Capacitor 4 (x2) |
Capacitor 5 |
|
|
Capacitance |
100 (pf) |
2200 (uf) |
10 (uf) |
100 (uf) |
100 (uf) |
|
|
Voltage rating (volts) |
250ac |
35 |
100 |
25 |
63 |
|
|
Price (£) |
3.204 |
6.36 |
0.634 |
0.462 |
1.83 |
|
|
|
|
|
|
|
|
Total: |
|
|
|
|
|
|
|
£12.49 |
Two 1N4002 diodes are needed, priced at £0.264 for two- http://uk.mouser.com/ProductDetail/ON-Semiconductor/1N4002/?qs=y2kkmE52mdNdNFjwQtWD1RpJlu6XqDoL
One LM317LIDR linear regulator is needed, priced at £0.37 for one- http://uk.mouser.com/ProductDetail/Texas-Instruments/LM317LIDR/?qs=iSMark9AYDUT6S7mAV4qU1rfWuL5BXPI
And a second linear regulator LM337 priced at £1.09 for one- http://uk.mouser.com/ProductDetail/ON-Semiconductor/LM337BD2TR4G/?qs=2OtswVQKCOFFi46blTDv1sOkYngktH8M
Terminal Grid- £1.20
Costs
Resistors: £0.806
Capacitors: £12.49
Diodes: £0.264
Regulators: £1.46
Total: £15.02
