Two options for
constructing the Mini-Maximiser
on Dick Smith board H-5614
"hey Mum, look what I built you and Dad for Christmas:
an air conditioner that runs for nothing during a power blackout"
The Mini-Maximiser construction article requires a printed circuit board that is difficult to obtain, and quite difficult to work with due to its compact size. A more user-friendly alternative is to use "Veroboard" style layout. Below are two options of this style: option 1 is a reprint of the the diagram from Soft Technology No.43; option 2 is using parts currently available (October 2000) at Dick Smith Electronics. Very similar boards and components are almost certainly available at Jaycar, Tandy, Altronics, Oatley Electronics, etc.
Beginners please note that the copper tracks are shown shaded because they are underneath(!): and both diagrams are views from above - i.e. the side on which the components are mounted
Option1 - single 3300 uF capacitor
Option2 - pair of 470 uF capacitors, improved MOSFET
| Parts List (option 2) | ||
|---|---|---|
| Qty | Description | DSE part number |
| 1 | Power FET SSP60N06 | Z1853 |
| 1 | BY229 (SF52 preferred if avail.) | Z3241 |
| 1 | LM311N comparator IC | Z6048 |
| 1 | 6.2V 400mW zener diode | Z3543 |
| 1 | 15V 400mW (or 1W) zener diode | Z3547 |
| 1 | 1N4148 diode | Z3120 |
| 3 | 3K3 1/4W metal film resistors | R0586 |
| 1 | 1K5 1/4W metal film resistor | R0578 |
| 1 | 100K 1/4W metal film resistor | R1124 |
| 1 | 2K vertical trimpot | R1937 |
| 1 | 0.1 uF monolithic ceramic capacitor 50V | R2001 |
| 1 | 100 pF ceramic capacitor 50V | Z2285 |
| 2 | 2way PCB mount terminal block | P4818 |
| 2 | 470 uF 63V RT electrolytic capacitors | R4165 |
| 1 | Circuit board "Vero" style | H5614 |
| . | . | . |
| (for a 24V version these extra components are required) | ||
| 1 | 15V 1W zener diode | Z3547 |
| 2 | 470R 1W resistors | R1466 |
| 1 | 12K 1/4W resistor | R1100 |
Mini-Maximiser Construction Article