Step 4: EEPROM Circuit
You will now be installing the EEPROM. EEPROM stands for Electrically-Eraseable Programmable Read-Only Memory, which is an excitingly complicated name for something that stores programs for the LameStation even when it's turned off. Since that's totally a mouthful, most people just call it an EEPROM.
Parts Needed
- 1 x 24LC256 EEPROM
- 1 x 8-pin DIP socket
- 1 x 10kΩ resistor
- 1 x 0.1μF ceramic capacitor
Instructions
- Insert the 8-pin DIP socket into U7. This is where the EEPROM will sit.
- Find the footprint for U7.
- Seat the socket, being mindful of the notch that indicates orientation on both the footprint and socket.
- Tape the 8-pin DIP socket into place.
- Solder the socket into place. As before, make sure the socket is flat against the board. The top-right pins as pictured are all ground pins, so they will require more heat to melt. Be patient with these pins.
Solder a 10kΩ resistor into R36. This is a pull-up resistor to create a weak high on the SDA line (YOU LOST ME HERE ON THE REASONING). Press the resistor firmly into place (picture needs to be updated).
Remember, resistors are not polarized.
- Solder a 0.1uF capacitor into C13. This filters noise for the EEPROM power.
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