Recent content by mdog69

If you nail up power and connect the Vin of one module to Vout of the other and do nothing else you'll have an interface that connects two devices with no dial tone, and no ring voltage. (More easily achieved with a 9V battery and a capacitor). Feed the switch hook output from both sides into...

Might be worth trying a daisywheel printer driver, as those were definitely designed to print to individual sheets (rather than fanfold/continuous paper). The driver might offer a "pause after each page" option that you wouldn't see/need with a tractor feed dot matrix printer. For a starting...

Did you actually read the manual? "Depress the red button on the upper portion of the eraser for three to five seconds, then release. This will light the lamp." "After completion of the erase, turn off the lamp by depressing the black button" Also note - "The lamp will operate, independent...

Lubricating a fastener is likely to result in lower torque being required to obtain the same tension. You could easily overtorque, and strip out the thread in the softer material. 100% in agreement with the advice regarding backing out to ensure that the screw re-uses the previously cut thread...

Here's my Sun external SCSI enclosure brain dump. Sun 411 enclosures (HD50, square-ish box) never had internal termination. Sun 611 enclosures (HD68, longer rectangular box) have automatic termination, and will terminate the top 8 bits separately as required. The termination is fully active on a...

Looking at the 5 pin DIN connector it looks like only the two outer and the centre pin are fitted. I reckon the supply is probably 7.5-0-7.5 - a centre tapped transformer. Before buying any bits, I would open the unit up and see what's inside. First thing to check - which of the three pins is...

You do realise that Sun Microsystems didn't make exhaust gas analysers?

That looks like the zimodem is receiving the server ID string, but not responding with the client ID string (or the other way round). You'll see that kind of behaviour if you telnet to port 22 on an SSH server. From a PC try telnet <target IP> 22 and see if you get the same responses. Put...

Looks like an EPROM for an onboard CPU, plus two OTP/mask ROM BIOS devices there, all sat in sockets. A dump of the trio might allow a better/easier identification.

I had one of those but with proper keys. Came with a Presario 8714 I bought back in 1997.

To clarify, there may be a capacitor which is charged via a resistor connected to the incoming rectified supply. That capacitor, once charged provides that initial power to kick off the oscillator. Once the oscillator starts, an auxiliary winding on the transformer takes over to provides the low...

First thing I would be google for would be "PSR-SQ16 gotek".

In the UK that device is called an ICD - Implantable Cardioverter Defibrillator. It differs from a pacemaker in that it simply monitors the heart's electrical signals, and if the signal that "does an orbit" around the heart to trigger the next heart beat is late/missing then it charges up and...

There will be two pins which connect to the eeprom - one is scl the other sda. If you have a device capable of sniffing and i2c bus you can use it to suss out the pins - make sure you connect scl and sda via a resistor to minimise current if you get it wrong. Also note that the two ID pins will...

I suggest booting the box (keyboard unplugged) with a serial console connection to a PC. Capture and post/dm the first few lines of the header which will contain most of the information a potential purchaser will want to see - memory, CPU info and whether the NVRAM battery has died (=mac...