I got a Battery Tester from Cousins. Costs just under £10, has a meter, switch and case. It was found that this was too small to use in the end.
https://www.cousinsuk.com/catalog/equipment/battery-watch-testing
The switch is unsuitable.
The circuit of the tester follows:-
Resistor values are not given in the circuit diagram. They are as follows:-
| R No | Value K | Value | ||||
|---|---|---|---|---|---|---|
| 1 | Grey | Green | Brown | Silver | 0.749 | 850 |
| 2 | Orange | Black | Brown | Silver | 0.302 | 300 |
| 3 | Orange | Black | Brown | Silver | 0.302 | 300 |
| 4 | Orange | Black | Brown | Silver | 0.297 | 300 |
| 5 | Yellow | Violet | Brown | Gold | 0.470 | 470 |
| 6 | White | Brown | Brown | Silver | 0.916 | 910 |
| 7 | Brown | Green | Red | Gold | 1.485 | 1500 |
| 8 | Brown | Orange | Red | Silver | 1.334 | 1300 |
| 9 | Brown | Red | Brown | Silver | 119 | 121 |
| 10 | Red | Black | Black | Gold | 0.020 | 20 |
| 11 | Brown | Black | Black | Silver | 0.010 | 10 |
| 12 | Blue | Grey | Brown | Gold | 0.674 | 690 |
The parts that will be used are the
- Meter
- Lead with Probes
- Size of PCB 45 x 55 mm - strip-board replacement.
- Case
All other parts are removed. There is sufficient depth for mounting switches along the side.