Description: This is the HP QDSP-6064 bubble display, a tiny, 4-digit, 7-segment numerical indicator. THis little guy is perfect if you need some user feedback from your system, but don’t want to fiddle with LCDs or other display options. The Bubble Display comes in an easy-to-use 12-pin DIP package and can be used in breadboards, protoboards, or PCBs.
These bubble displays have a peak forward current per segment of 5mA at a peak forward voltage of 2V. Thanks to a neat magnification technique used by the QDSP-6064 (giving it the “bubble” name), the luminosity is intensified making lower power consumption possible.
Based on 6 ratings:
1 of 1 found this helpful:
I remember having seen these in calculator from way back. These displays are tiny, easy to use and have very low power consumptions, which makes me wonder why they are considered obsolete and why many stopped building them.
Ive found these to be great to work with. their low current rating allows me to drive them from a microcontroller with ease and their tiny size gives for great adaptibility. Ive mostly been using these as displays for POST(Power-on self-test) messages in my more complex projects to find out if something is malfunctioning.
When I was hooking the display up, I accidentally lit up a segment with no resistor and it was bright! Luckily it didn’t burn out, so I decided to use it directly soldered on the back of an Arduino Pro Mini hooked up with an accelerometer to make a mini pedometer. Remember, it really does use up 12 pins! Overall it’s a great little display.
A great way to get information from your project and for less than $3, you can’t beat the price.
When these went up for sell for the first time, I purchased one without knowing a project for it–that came later while I was waiting for this to arrive (it became a timer). The total current you will get through each segment is small enough you can use an Arduino to control the common cathodes directly. Use a shift register to control the segments.
very good quality! very clear, und sooooooooooooooo cuuuuute!
This thing is tiny. It actually surprised me how tiny it was. But it’s perfectly readable and isn’t particularly hard to wire up. I got one working with a Raspberry Pi, a breadboard, some jumpers and resistors, and a few minutes of coding. If you’re looking for a small, easy-to-use seven-segment display, this is what you’re looking for.