elektronik

EEPROMs lesen

Spurtikus
EEPROMs auslesen mit Batronix Barlino II Riesen-Vorteil: Die sehr gute Software gibt es unter Linux (und Win und MacOs) ST M27C1001-10F1, 128 KByte EPROM. Automatisches Erkennen funktioniert. Auslesen klappt auch. Dies ist ein Chip aus einem uralten Canon Dia Scanner. Irgendwo im ausgelesenen Chaos finde ich den String IX-27015C Version 1.17 (c) Copyright Canon Inc. 1992-1996 All rights reserved Winbond W27C512-70, 64 KBytes EEPROM. Automatisches Erkennen funktioniert. Auslesen auch. Dies ist ein Chip aus einem uralten Canon Flachbett Scanner.

TV Tuner

Spurtikus
Tuner ENV578E1G3 Tuner from 1996. Main chips are TSA5511AT and MT06A. While TSA5511 is the PLL Synthesizer, which generates all required frequencies, the MT06A is unknown to me. But it must be the RF mixer, which produces the IF output by mixing input signal with PLL synthesizer output. Connector has 5 small pins and 4 large pins. In my listing, numbering starts with outermost small pin. To check against reality, compare against my image from the original TV board.

RM Italy RL-203

Spurtikus
RM Italy produces nice RF amplifiers. Some of them are for the CB “Export” market and produce a lot of watts for a few bucks. The official ham radio amplifiers are much more expensive. They cover the common ham HF frequencies between 3 and 30 MHz. The CB ones focus on around 27 Mhz of course. For RL-203, I read that it is possible to modify such a cheap amp to use it on complete HF range.

Lötstation ZD-917

Spurtikus
Einfache Löt- und Entlötstation. Gekauft vor ungefähr 10 Jahren. Funktioniert sehr gut. 03/2022 wurde der Lötkolben nicht mehr warm. Vermutlich Heizelement defekt. Das Gerät zeigt direkt nach dem Einschalten kurz “u01” an, evtl. eine Firmwarenummer. Am Lötkolben-Stecker sind 4 Kontakte, zwei für den Thermofühler (rund 2,4MOhm bei 25°C) und zwei für das Heizelement. Ich messe am defekten Kolben 2,2 Ohm. Meine Vermutung ist, dass das Element einen inneren Kurzschluß hat. Es handelt sich um einen 24 Volt / 60 Watt Lötkolben.

Teardown of a Multimedia Color Monitor TM-7003A 7 Inch

Spurtikus
This monitor is from automotive area. On the case, we find the name Multimedia Color Monitor TM-7003A. I saw that this display was sold under many different names and brands. Panel: Hannstar 721q310c35-a0, 7 Zoll, 480x234, mit Touchscreen 26 pin. Not a parallel RGB input display. This display has three pins for R,G,B analogue input and several inputs for horizontal and vertical syncronization. I would say this is something like old VGA data.

Teardown of a 9 Inch automotive monitor with Toshiba TFT panel

Spurtikus
This monitor is from automotive area. Panel: Toshiba LTA090B400F 9 Zoll, 800x480, 6 Bit RGB (parallel RGB) 40 pin, 0,5mm pitch connector Front. I already had opened it and all the switches fell out. Back Back cover removed. We see at the left the custom controller for the monitor, at the right the HV section fort backlight. At the bottom a small PCB can be seen for switches and A/V connectors.

Teardown of a Navilock 8 Inch touchscreen panel

Spurtikus
This monitor is from automotive area. It has a touchscreen, and a low resolution of 640x480, I suppose it is an older one, maybe more than 10 years old. Panel: Sharp LQ080V30DG01 8 Inch, 640x480, 6 Bit RGB (parallel RGB) 32 pin 0,5mm pitch connector Front Back Back cover removed Panel connector Monitor PCB removed. We see the pure panel with its controller. Panel controller. Touchscreen controller removed from main PCB

Converting a DEC Keyboard LK401 to an USB Keyboard

Spurtikus
DEC Keyboard LK401 has serial interface, 4800 Baud, 8N1. See more information on the keyboard hardware here. The keyboard is solid and heavy, has superb tactile keys and is of the old 80ies quality. That you simply cannot order on Amazon or so. For a long time, the keyboard was supported by the Linux kernel, but this time is gone. My idea: connect the keyboard to a microcontroller that can connect to a PC via USB.

DEC LK401 Keyboard

Spurtikus
This keyboard came in as part of a Digital DEV VT402 terminal. I have some information on that terminal here . After some time, I found that the keyboard of that terminal is also an interesting kind of thing. DEC LK401 Hardware DEC Keyboard has a serial interface. The connector to plug into a DEC VT420 terminal looks like an old telephone connector, with 4 pins, called RJ10. An Intel 80C51 microcontroller handles most of the keyboard functions We can see also the Beeper and a 7.

Experimenting with an old FM tuner

Spurtikus
I tried to buy a variable capacitor via ebay. What I got was the variable capacitor together with a small metal box. The box contains a FM tuner. It contains two germanium transistors AF121/AF125 and it seems it is from the 1960ies. (click to view larger version) This picture shows the variable capacitor, forming the base for the FM tuner. Metal box has been removed. I was not able to move the shaft/axis of the capacitor.