A microcontroller based special effects unit with two relay outputs and a sound replay chip and amplifier.
One moment please…
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YouTube serves up blasts from you back catalogue on a daily basis. At this rate I'm going to be watching your vids into my dotage (strangely not that far away anymore since I fell into a YT time sink…)
Were these designs your own – it sounds like it – or grabbed from ETI or Popular Electronics or the like?
what were the tools for board design back in those days?
Did you solder this board yourself?
would have been wonderful to market to the haunted attractions industry in the US back in the day 🙂 especially if it were to be far less expensive than mp3 audio effects controllers 🙂
Great looking project! You are a very smart and entertaining person. Ever watch shango066's channel? He is really good too.
The PCB says: "Clive 96", great job
You can use a resistor in series with a switch to protect the accidental input transforming to output of the microcontroller so instead of dead short it's a load. The device looks very good quality even to today's standard. Thumbs up.
Ah, a project that used an ISD ChipCorder IC! Back in 1996 when I was still in high school one of my friends who was also into electronics built a couple of voice recorder boxes using the ISD 25120 ChipCorder IC. That one was able to record up to two minutes of sound. Unfortunately, I've lost that box. I did eventually think of building another for fun, but found that the ISD 2500 series has since been discontinued.
It seems like Nuvoton took over ChipCorder, and ChipCorder ICs are still being made, with these newer series including more modern interfaces such as I2C and SPI, and higher capacities up to 16 minutes.
I like a man with aspirations to working in the circus
Quality build Clive,
I'd frame it behind glass and put it on a wall. Love to see it working with a PIC reinserted.
Regards, Ian
I used the PIC16F57 micros years ago. OTP and all the fun that comes with it although I had a couple of JW (erasable) versions for code development.
I'm wondering, Does that speech chip require a voltage to remember the recorded speech? If so I'd think its rather like a Bit Bucket Brigade (MN3207 comes to mind)
And to think, people these days would use an arduino or RaspberryPi to do the same job, very well thought-out, shame it never got past the prototype stage… 🙂