Dram tester for 4116 and 4164/256 (now in beta testing for serial communication)
Simple project taken from the base of @FozzTexx
with added support for 4116 memories and a status display.
This Tester supports 4164,41256,4116,4532 and pin compatible Dram.
☕ if you want the PCB, please support me and follow this link : PCBWAY!
Components:
C1,C4,C5,C6,C7: 100nF
C2: 10uF 25v
C3: 47uf 25v
D1: BAT43 (optional, you can short)
DC: MT3608 (DC-DC converter - 4~5V in, 12V out)
Disp: Display oled 128x32 i2c
H1,H2,H3: 3 pin Header-Male 2.54
R1-R13: 47 Ω 1/8w (optional)
R14,R16: 10k Ω 1/4w
R15: 2.2k Ω 1/4w
1x Arduino Nano
1x Zif 16 pin (or 16 pin socket)
1x 7760 (7660s)
1x tactile switch 6x6
N.B.: The DC-DC must be able to accept 4V on input and must be set to output 12V
Directory
Gerber : https://www.pcbway.com/project/shareproject/Dram_tester_for_4116_4164_256_and_4532_d6b7143c.html
IMG : Tester's pictures
Firmware : Firmware for Arduino Nano (you can use avr commands like Arduino's IDE or an AVR programmer to write the HEX file)
Source : Source file to compile for Arduino
Beta folder (inside firmware/source) : software/firmware with serial communication, without LCD (9600 baud)
How it works
First you need to flash the firmware on arduino of course!.
Before inserting the ram select the correct setting with the jumpers: (all jumpers must be in the same position, all high for 4164 or all low for 4116)
If the setting is on 4164-256 it is possible to select the type of memory (from 4164,41256,4532-L,4532-H) by briefly pressing the select / start key. (memory 4116 has no selections)
To start the test, keep the select / start key pressed for 1 sec.
After the test the result will be displayed, if there is an error the test will stop and the point of the error will be shown.
How to burn the firmware
You can use avrdude integrated on arduini via command line, or simply download a gui (if you use windows) like AVRDUDESS.
Support 3D Print
Thanks to seanch80, you can print the base in 3D, the stl file is in the 3D_print folder.
You will also find a "3jumpers" file to be able to glue the 3 jumpers in order to easily move them all together.
