I have an ESR T4 tester. It measures the capacitance of capacitors well, it has helped me out more than once. Externally, the whole capacitor was a capacitor with a capacity 10 times less than the declared one. Frequent use will drain the battery quickly. I use saline, but alkaline doesn't help much either. There is a lithium crown, but it is not cheap. I decided to switch the power supply to Li-ion, but use what I have.
What was needed:
Actually the ESR T4 tester itself -
There is a battery of almost 2 A/h with a protection board -
I will charge the battery with an excellent module - The protection board is already installed on the battery.
We make the case and lithium power supply for the tester with our own hands
Since the battery produces a maximum of 4.2 volts, and the tester requires about 9 volts, you need to increase the voltage. To increase the voltage I will use a Chinese module - I'll turn it up to 9 volts.
I will glue the modules onto double-sided tape. I’ll connect it with wires and disconnect the positive one with a switch.
Now let's move on to making the body. The components are quite small, I will try to make the case compact. The body will be made from PVC plastic.Glue with super glue.
The main component is the tester, and I will use it to cut the plastic.
Having estimated the dimensions, I cut the blanks. I pre-glued the box and stands for the tester. Installed a partition.
I mark the hole for the charger connector. I glue the bottom of the box.
I cut out the bottom lid of the box. I mark the window for the switch. I glue the mounting supports. I immediately mark the holes for the screws.
I painted the box with spray paint. I immediately cut out a frame for the indicator. I glued plexiglass on the inside to protect the indicator.
I'm trying out a tester in my niche. I unsoldered all the wires. Everything is simple here. From the charging module to the battery, from the battery to the boost module. From module to tester. I break the positive wire from the battery to the boost module with a switch. I also glued the pads under the frame. In the photo, on top of the case.
I screw the frame and the body is ready. I'm checking. The voltage is about 9 volts.
This is how the body turned out. Li-ion power fits perfectly. I think it will last for a long time. You can also connect external power. The module will provide a stable 9 volts or so.
