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| TC1 lcr-meter transistor-tester fix |
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| madires:
Regarding the additional control MCU U4 (STC15L104W) there are two options: - reprogram: https://github.com/atar-axis/tc1-u4 - replace with two-transistor circuit: https://github.com/madires/Transistortester-Warehouse/blob/master/Hardware/TC1-Mod.pdf For m-firmware download the latest version from https://github.com/madires/Transistortester-Warehouse/tree/master/Firmware/m-firmware and use the settings listed in the Clones file (TC-1, old variant). Compile the firmware and program firmware and EEPROM. And don't forget to set the fuse bits. |
| tedris:
Thanks What is the difference between these two options? Which is better? practical? Which one can I use? |
| madires:
The two-transistor circuit mod requires some soldering and decreases the quiescent current to about 5 µA. Reprogramming the STC15L104W takes less effort but the tester still has a high quiescent current (you could add a switch). |
| tedris:
"tester still has a high quiescent current (you could add a switch). " i dont understand. this Thank you for your help. How is this a problem for me? What is the harm? Is it enough for me to go back to its old self? I will be careful not to make the same mistake again (testing without discharging the capacitor). |
| madires:
With the STC15L104W the tester has a high quiescent current which drains the battery in a few months. To mitigate this you can add a simple switch in series with the battery. |
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