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Reviews (4)
Apr 06, 2016
Extremely useful for embedded design work on the Zilog Z8
I like working with older electronic components and this Zilog In Circuit Emulator is great for working with the original Z8. Zilog still offers the integrated development environment for free download. There are multiple interface pods for the Z86L9800 available that mate with the different Z8 packages and pinouts. If you find a Z86L9800 for sale, make sure it comes with the interface pod you need for the Z8 package you intent to use, and the ribbon cable used to connect the pod to the ICE.
May 17, 2016
Excellent scope available at good prices from great sellers
I use both virtual and physical instruments in the work I do, but I really like the tactile feel of a physical scope. Tek makes some of the best (and most expensive) scopes available and their products hold up extremely well over time. The cost effective LCD digital scopes available today from Rigol and a host of other manufacturers are good instruments, but they just don't have the "built to last" feel to them that the Tek, HP, or recent B&K scopes have.
The TEK 2230 is one of those solid and reliable instruments. Built and sold in the 80s, the majority of these scopes are still working and in good condition. The 2230 is a hybrid Analog and Digital scope with a front panel button that selects the desired mode.
In the Analog mode, it does everything you would expect a 100Mhz dual channel scope to do and everything Tek is famous for: Bright, sharp, and robust display that can take normal lab abuse over and over without failing. Rigid metal enclosures, strong handles, and front panel controls that don't break off after years of pushing, flipping, or turning. Independent triggering for A or B channel. Calibrated or continuously variable vertical/horizontal settings. Sweep time magnification. A, B, or A&B display with alternating or chopped sweep. Variable sweep trigger delay. Probe test. And more.
But the 2230 adds a digital assist feature that writes the vertical and horizontal settings on the screen which is perfect for photos or plain old readability when setting up the scope and taking measurements. You can adjust the brightness of this feature or turn it off when you don't need it.
The digital mode makes the 2230 a digitizing scope capable of on-screen horizontal and vertical measurements. Two selectable cursors allow taking independent or delta measurements from the waveform displayed on the screen. You can save the waveform to on-board memory and recall it later. And even store waveforms to a computer over a serial port. These were rocket science features back in the 80s but still hold up very well against modern fully digital scopes.
The Tek 2230 even includes an on-screen menu feature for selecting instrument options and self-tests.
After more than 30 years, the Tek 2230 is still a great instrument. And good ones are available from quality sellers at great prices. I have purchased several scopes on eBay with great success. Just be sure to become an informed buyer before you bid. I purchase only from equipment houses with a good reputation, but a knowledgeable independent seller can offer a good scope too. Be sure to ask questions and if the offer says "powers up but I don't know enough about this..." then just assume it's broken and bid accordingly. Or better yet, encourage sellers to become more informed about their offer by NOT bidding. "I don't know enough about this to test it", indeed.
After working with a good used Tek scope, the new LCD digital ones just won't seem as cool. The 2230 is a great product for the home lab. A quality used 2230 has many more years left in it. Look closely, pick a good seller, and I think you'll be as happy with yours as I am with mine.
Jun 29, 2021
Excellent value in 7-Segment displays
These are mint NOS LEDs with original QA stamp. No rejects. Almost no tarnish on leads. A random sample of 5 all meet TI mechanical specifications in the datasheet. All segments evenly lit including right hand decimal point. Each segment Forward Voltage within 10mV of each other at approximately 10mA per segment. An excellent value in 7-Segment LED displays.