Tag: ttl

Fried Meilhaus ME-8200 Digital I/O card (WHL #75)

I can’t stand throwing away allegedly damaged stuff without proper diagnosis (or even working surplus items) at work. For today, I took home a pretty nice I/O card for final testing before sadly putting it in the bin. It’s a ME-8200B PCIe card from Meilhaus, a German test equipment specialist. It’s red (which makes it faster), and it retails for 680€ plus VAT at the moment, so certainly not something you’d throw away without second thought. However, due to our overpriced fancy standard clients at work, testing PCIe cards is basically impossible – you can’t do that inside those tiny cases, and I’d hate to completely disassemble one of those things (short cables to fit the envelope!), […]


PWM Pulse Frequency Duty Cycle Adjustable Square Wave Signal Generator Module (WHL #43)

Haven’t reviewed a lot of China gadgets lately, have I? Well, what about a tiny PWM generator…

I remember having the need for some good old TTL PWM signal and being too lazy to program an Arduino for it. I mean it is dead simple and there are examples included, but hooking up some knobs for live modification of the duty cycle and possibly the frequency as well, nah. There has to be a Wan Hung Lo solution to this, and indeed, there is.

This unit was actually purchased via eBay, as Ali wanted significantly more money for it. I’ve checked and now the eBay is the more expensive dealer, as it basically always is these days. […]