Can anyone recommend me a DC-DC step up from 5-9V up to about 25V for Z-Diode test to buy on ebay?
A good DC/DC converter would be MEA1D0515SC from muRata. I recommend to power it by a separate LDO with proper decoupling. Please see the ATmega 644 schematic in Karl-Heinz's documentation.
Thanks for the quick reply.
I have seen that the MEA1D0515SC is quite expensive.
I've seen some cheaper converters on eBay, such as the link below here could not be enough?
http://www.ebay.it/itm/DC-DC-Step-up-Boost-Converter-3-3V-5V-9V-12V-2A-Adjustable-Power-Supply-Module-/322449827696?hash=item4b1381e770:g:gT8AAOSwsS1ZjQ46
This tester DOESN'T use an 18650, it uses an 14500, also a lithium Ion which is the size of a AA and not as popular as the 18650.
What do you guys think about this one that uses a 18650
7.) I'm still very confused, and I'm starting to feel impatient with you. What is the latest cheap clone I should look for?
The 'names' of clones are non-existent. The latest mass produced version (2017) comes with a red PCB that is often incorrectly called a M12864 by sellers. The variation that is sold with a frequency counter and Square Wave PWM output is usually considered the 'latest pretty version.' This version reliably comes equipped with an ATmega328 and is already configured with most project accessory options. Forum members often call it "AY-AT" because this has been printed across a few variations.
What do you guys think about this one that uses a 18650If I wanted to get a Lithium powered unit I'd get the "T6."
Like this:
http://www.ebay.com/itm/232333734207
That's the evolution of the one that Dave was sent. Unfortunately the screen is color, but you get a bunch of extra circuits like infrared and zener threshold if I'm not mistaken. The unit that Mauroh suggested has a nice case with a monochrome screen, but all of these have surface mount ...
the problem with socketed chips is the contact resistance can change over time.
smd chips are best - fit a programming header.
Quote7.) I'm still very confused, and I'm starting to feel impatient with you. What is the latest cheap clone I should look for?
The 'names' of clones are non-existent. The latest mass produced version (2017) comes with a red PCB that is often incorrectly called a M12864 by sellers. The variation that is sold with a frequency counter and Square Wave PWM output is usually considered the 'latest pretty version.' This version reliably comes equipped with an ATmega328 and is already configured with most project accessory options. Forum members often call it "AY-AT" because this has been printed across a few variations.
Searching Aliexpress on M12864 brings up kits. Searching on AY-AT does not come up.
Does anyone know of a variation that is sold with a frequency counter and Square Wave PWM output is usually considered the 'latest pretty version. That is NOT a kit?
thanks
the problem with socketed chips is the contact resistance can change over time.
smd chips are best - fit a programming header.
No, they are not! These testers have a known, all to common, failure mode of the chip blowing if you connect a charged capacitor.
btw, i can swap-out a QTFP package faster than you can swap a chip in a dil socket!
Does anyone know of a variation that is sold with a frequency counter and Square Wave PWM output is usually considered the 'latest pretty version. That is NOT a kit?
Or here's a seller with assembled, kits, or case options in one listing.
http://www.ebay.com/itm/112489435576
Or here's a seller with assembled, kits, or case options in one listing.
http://www.ebay.com/itm/112489435576
Thanks I ordered one assembled with the case for $18
What do you guys think about this one that uses a 18650If I wanted to get a Lithium powered unit I'd get the "T6."
Like this:
http://www.ebay.com/itm/232333734207
That's the evolution of the one that Dave was sent. Unfortunately the screen is color, but you get a bunch of extra circuits like infrared and zener threshold if I'm not mistaken. The unit that Mauroh suggested has a nice case with a monochrome screen, but all of these have surface mount ...My problem with T6 and the rest of Tx (except early T) is they are surface mount, and the LCD are soldered to PCB. To reprogram, either you have to desolder the LCD ribbon cables, or to desolder the chip. after the reprogramming, soldering them back.
Is there an smt variant with rotary encoder, case and color display already assembled?