PiDP-1 Prototype running Minskytron

Built by Oscar Vermeulen and me
Note the lamps are flickering way too much at this stage. We need incandescent light bulb simulation eventually.
And the big key switches are completely wrong still.

[@jordankostov7581]

Woah. first time i get notification for this channel since the GTA disassembly tutorial! I learned so much from that one and from i see there will be more to learn here :).

[@BoredInNW6]

What a beauty! I must admit I'd like it even better if it had the white-on-blue colour scheme, but it's great work as it is!

[@kotzkroete]

we also have the white on blue colour option. it is however PCB-blue, not the original :(

[@matthiasbarthel4064]

this is my favorite computer, iam also working on a simulator like these - but yours is already working :) do you have a projectsite for these beauty ?

[@stormsirens2BACKUP]

What model of LED is used? I kinda like the look!

[@Veso266]

Why dont u use real incondecent bulbs Easier then to simulate them and changing them ads to the charm (easier to change the incondecent then len, and both can break), you just to create a test mode where every light is lid to see if they still work

[@corner5837]

My guess would be power? There’s a lot of lights there so I’d imagine incandescents would have a lot of thermal losses. And LEDs are just standard nowadays

[@Veso266]

@@corner5837 thats true but theese are indicator lamps I dont think u save so much energy because other parts of ur system draw much more They are for some reason slso easier to replace Have u ever see a led (only led, without psu) on a screw mount Leds are usualy msde to be soldered

[@lwilton]

I love original incandescent lamps, but I'd bet you could do a decent simulation with 4500K white LEDs. Feed each LED with a lowish value resistor from a cap around 5-10uF, and feed that thru another lowish resistor from a switched voltage source that goes from just below start voltage for the LED up to 4 or 5 V. A little playing with the resistor and cap values should give a pretty decent approximation of an incandescent lamp. All that will be missing is the slight color shift as it warms up and cools down, but that probably isn't worth simulating. Of course you could do the simulation "right" using 3-color LEDs and a Raspberry Pi to drive them, but putting more compute power into the LED simulation than the processor has just seems wrong to me. YMMV.