Testing of Clone PI AVR metal detector

Some years ago a have started building Clone PI AVR. Made a PCB, soldered all the components and … and never found time to finish it until today. Well I haven’t finished it yet but at lest gave it a first test run. For the screen and buttons i have re-purposed some front panel of some old router. Now i see that i will have to put it in to another box for better mounting on the metal detector itself but this time it was good enough for test run. For Atmega programming I used Mini Pro TL866 programmer I have bought while ago – works like a charm. You can see some photos and video on work in progress.

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Programming Atmega8

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Circuit of Clopne PI AVR:

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CPI_AVR_VOLTS.gif

HEX file for burning Atmega 8 and PCB Sprint layout.

Atmega8 fuses
Atmega8 fuses
Flashed Atmega8
Flashed Atmega8

Eachine H8 Mini silent mod

I was annoyed with Eachines H8 Mine constant beeping in headless mode so decided to make it silent once and for all. This mod is easy – just open the transmitter, remove beeper by desoldering it and solder similar LED instead of it ( check the polarity – positive is marked on the PCB  ). Then drill a hole of LED diameter in front side of controller case and it is done.

Eachine H8 Mini - beeper removed and led soldered instead of it
Eachine H8 Mini – beeper removed and led soldered instead of it
Eachine H8 Mini controller reassembled. You can see old beeper that was removed and new led in its new hole.
Eachine H8 Mini controller reassembled. You can see old beeper that was removed and new led in its new hole.