Parts List
The components are grouped into values, the order of the component names is of no particular
consequence.
A quick note on European part descriptions:
For resistors: R is shorthand for ohm. K is shorthand for kilo-ohm. M is shorthand for mega-
ohm
For capacitors: 1uF = 1,000nF = 1,000,000pF. Sometimes the F is not included on the circuit
diagram to indicate a capacitor's value, ie. 100n = 100nF.
To prevent loss of the small ‘.’as the decimal point, a convention of inserting the unit in its
place is used. eg. 4R7 is a 4.7 ohm, 4K7 is a 4700 ohm resistor, 4n7 is a 4.7 nF capacitor.
Resistors
All resistors are 0.25W 1% metal film or better.
47R
R5*
240R
R3, R4
2K2
R1, R2
10K
R6
* If the RPSU is to be used within a project featuring an internal mains transformer then R5
should be a wire link and not a resistor. A resistor lead clipping is normally long enough for
this purpose.
If +/-12V operation is required then you should make both R1 and R2 each a 1K8 resistor.
Capacitors
100nF, 63V multilayer axial ceramic C1, C4, C5, C6
10uF, 35V or 50V electrolytic
C2, C3, C7, C8
22uF, 35V or 50V electrolytic
C13
1000uF, 35V or 50V electrolytic
C9, C10, C11, C12
C9 to C11 are radial types and have standard wire ended leads. Lead spacing is either 5mm or
7.5mm. Do not get 'push-fit' types as their pins are too large to fit into the PCB. Ensure they
have a ripple rating of at least 750mA.
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