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I've read the eeprom responsible for start-up check routine, who can help me decode the program? Disassembled?the contents using dz80 disassembler, but it is very weird and I don't know much about

Did you checked the supplys for ripple voltge with a scope ? If ripple if excessive the DC can look higher for your multi meter. Is adds the average AC from the ripple to the DC. Fred PA4TIM

On Tue, 19 Mar 2013, lazystrings wrote: There are even more exotic devices that are not available and worth rebuilding from discrete chips. DS1250Y is 4MByte device so no wonder it is expensive. But

Their I/O model is USB, and with it comes most of USB's gifts and problems. If you want to use it asynchronously, set up a task to poll it in the background. That way your programming sensibilities

This is opposite the usual problem of having something overloaded by a bad cap or rectifier, for example. If all of the secondaries are in the correct proportions, then look to the chopper stage. As I

Not all the Dallas Semiconductor NVRAM are available, some of them are obsolete or they are very expensive. The DS1250Y costs between $58 and $62 if is in stock. The DS1486 is not available from

In getting started troubleshooting a 2213 with low gain on one channel, I figured I should probably check the supplies just to make sure they were okay -- they aren't. They are all significantly high

I have a 7104 delay line. Each end terminates in two coax cables with peltola connectors. When I have a chance, I will terminate three ends into 50 ohms and take a look with the TDR. This delay line

Here you go

I can't find the MBRF40H45CT-E3/45 Schottky anywhere. Is there an available substitute for this?

I can't find the MBRF40H45CT-E3/45 Schottky anywhere. Is there an available substitute for this?

The simplest and most likely to work way to extend the line is just using more .141 semi-rigid line. If you have any RG-8 cables - the big stuff - and an adapter for N to SMA, it should definitely

Nothing stops you from implementing ibnotify() on a background thread. (Well, nothing except National Instruments' patent on the concept of a callback function tied to a GPIB event.) -- john, KE5FX

I wonder why the LM311 failed. They are suppose to have fairly rugged outputs. I have picked up a couple "We don't know how it works, so it's being sold As-Is" items that either worked perfectly if

I remember the thread where this was discussed. If an SW06 was used to replace the LF13333, then I think the timing problem could be fixed by altering capacitors C2310, C2400, and C2300 a little bit

Okay, here's my report on the loss of center frequency on a 7L13 plugin (digest #7424), albeit a bit late. I had to put together a parts order (Thanks to the tip from 'crippo2', Vernonia Northern,

Today the Pulse Gen come to live, after replace the weak Q100 transistor by selected from what ever transistor I have in my shop..the winner was a npn switching "MPSH10". The rise time seems to be

Thanks for that tip. If I graduate from the camera, looks like an NI board is indeed a good option. Unless the homebrew USB solution published in Elektor deals with this. I'll have a look later. /m

Google ibnotify()

If you don't care for the programming model you use, the POS prologix usb adapter ought to be just fine. but if you care about knowing when a device pulls-up the SRQ line in an asynchronous manner