I have an ESR T4 tester. Measures the capacitance capacitors well, left more than once. Externally, a whole capacitor was a capacitor with a capacity of 10 times less than the declared. With frequent use, the battery is quickly discharged. I use salt, but alkaline does not particularly help. There is a lithium crown, but it is not cheap. I decided to transfer power to Li-Ion, but apply what is.
What you need:
Actually the ESR T4 tester itself -
There is a battery for nearly 2 A / h with the protection board -
I will charge the battery excellent module -
The protection board is already installed on the battery.
Make the case and lithium nutrition for the tester with your own hands
Since the battery maximizes 4.2 volts, and the tester requires about 9 volts, it is necessary to raise the voltage. To increase the voltage, apply a Chinese module -
Scrap 9 volts.
On bilateral tape gluing modules. Connect with wires, plus rupture switch.
We now turn to the manufacture of the case. Components are quite small, the body will try to make compact. Corps will make their PVC plastic. Glue super glue.
The main component is the tester, on it and will cut the plastic. After typing the dimensions, cut the workpiece. Sklexed the pre-box and stands for the tester. Installed the septum.
I place a hole under the charger connector. Give down the bottom of the box.
I cut the bottom cover box. Location a window for switch. Slim fasteners. Immediately I place the holes under the self-tapping screw.
Painted box paint from the canister. Immediately cut the frame for the indicator. From the inside stuck plexiglas, to protect the indicator.
I try on the tester in my niche. Slap all wires. Everything is simple here. From the charging module on the battery, from the battery to the boost module. From the module on the tester. The positive wire from the battery to the boost to break the switch. Still stuck lining under the frame. In the photo, on top of the case.
I screw the frame and the case is ready. Checking. Voltage about 9 volts.
Such a hull turned out. Perfectly fit Li-Ion food. I think it will be enough for a long time. You can also connect external nutrition. The module will provide stable 9 volts, or so.