NE555 Counterless Sequencer

We're always on the lookout for cool DIY projects, and this NE555 Counterless Sequencer from organfairy certainly fits the bill! It uses the NE555 a versatile 8-pin IC used for timing, pulse generation, and oscillator applications - in conjunction with a design from 'Digital Design: Principles and Practices' by John F. Wakerly. The sequencer has 8 interconnected NE555 modules (see previous video below) incorporating an RS Flip Flop circuit to aid tuning, for what appears to be a very fully featured and fun sequencer.

Here's more from the video... 

'Radio buttons' is an expression used for a row of buttons where a button stays down when you press it. You press another button and the first one will pop up again while the other button stays down. 

It is possible to make such a device with simple pushbutttons and a few logic gates instead of the complicated (and expensive) mechanical locking switches. This is what I explore in the beginning of this video - and it is actually exploring since I haven't used the concept before so I didn't know if it would actually work. I do know that the old Moog Taurus bass synthesizer used a similar idea for its preset buttons.

The music is also a kind of exploration project since I decided for the first time to (over)use the portamento function on my Elka X-30 organ in an arrangement. Apart from the organ I also use my Roland JV-35 for some of the parts

More from organfairy

• Look Mum No Computer Interview 20-Oct-26
• KORG MS2000R Hardware-Level Emulator 20-Oct-26
• STR-500 Gestural Granular Synthesizer 16-Oct-26
• F9 Kits Vol 1 & FREE Beat Machine 15-Oct-26
• SLEDGEHAMMER: Music Production Breakdown 14-Oct-26