Remember that box of mixed chips the lady who visits our repair cafe donated? Still going through it. Discovered another Z80 and a couple of PIOs yesterday. Another chap from the repair cafe is fixing a bathroom fan timer. Found some CD4001’s in the box for him.
October 30, 2024 at 10:31 AM
Remember that box of mixed chips the lady who visits our repair cafe donated? Still going through it. Discovered another Z80 and a couple of PIOs yesterday. Another chap from the repair cafe is fixing a bathroom fan timer. Found some CD4001’s in the box for him.
Built a working AND gate from scratch using 3 NOR gates on a CD4001 chip. Took some debugging, but it now only lights the LED when both inputs are high. Learned a ton about CMOS quirks, floating inputs, and how to tame them. Feeling good!
#electronics #breadboard #CMOS #logicgates #CD4001 #ANDgate
#electronics #breadboard #CMOS #logicgates #CD4001 #ANDgate
May 23, 2025 at 3:06 AM
Built a working AND gate from scratch using 3 NOR gates on a CD4001 chip. Took some debugging, but it now only lights the LED when both inputs are high. Learned a ton about CMOS quirks, floating inputs, and how to tame them. Feeling good!
#electronics #breadboard #CMOS #logicgates #CD4001 #ANDgate
#electronics #breadboard #CMOS #logicgates #CD4001 #ANDgate
Button switches the 4 bi-color LEDs between red and green. A toggle switch enables or disables the 555 blink signal. Next is to wire the 555 to blink the 4 LEDs. It’s looking good so far. 🥳
#electronics #breadboard #bicolorled #cd4001 #555timer
#electronics #breadboard #bicolorled #cd4001 #555timer
May 24, 2025 at 2:29 AM
Button switches the 4 bi-color LEDs between red and green. A toggle switch enables or disables the 555 blink signal. Next is to wire the 555 to blink the 4 LEDs. It’s looking good so far. 🥳
#electronics #breadboard #bicolorled #cd4001 #555timer
#electronics #breadboard #bicolorled #cd4001 #555timer
Next up: trying to use my NOR-built AND gate to control the 555. Idea is, if I pull the signal high, the LEDs blink. If it’s low, they stay on. Hoping this lets me switch between flashing and steady with one input.
#electronics #breadboard #555timer #CD4001 #logicgates
#electronics #breadboard #555timer #CD4001 #logicgates
May 23, 2025 at 3:12 AM
Next up: trying to use my NOR-built AND gate to control the 555. Idea is, if I pull the signal high, the LEDs blink. If it’s low, they stay on. Hoping this lets me switch between flashing and steady with one input.
#electronics #breadboard #555timer #CD4001 #logicgates
#electronics #breadboard #555timer #CD4001 #logicgates
Great implicit breadboard tip by PH1X on Twitter
There was a great embedded breadboard tip in this tweet: [Wayback/Archive] PH1X on Twitter: "Working on a Quad 43 pre-amp that has problems with the source selection. Don’t have al logic IC’s in stock to replace them so instead I made a little test…
There was a great embedded breadboard tip in this tweet: [Wayback/Archive] PH1X on Twitter: "Working on a Quad 43 pre-amp that has problems with the source selection. Don’t have al logic IC’s in stock to replace them so instead I made a little test…
Great implicit breadboard tip by PH1X on Twitter
There was a great embedded breadboard tip in this tweet: [Wayback/Archive] PH1X on Twitter: "Working on a Quad 43 pre-amp that has problems with the source selection. Don’t have al logic IC’s in stock to replace them so instead I made a little test circuit. This CD4001 works as it’s supposed to do so I have to dig a little further."
wiert.me
August 11, 2026 at 11:01 AM
My issue? The CD4001BE provides voltage but no current (still don’t fully get how that’s possible). It couldn’t turn on my NPN. I used my last inverter so I could drive a PNP instead, now it works!
#electronics #logicgates #transistors #DIYcircuits #CD4001
#electronics #logicgates #transistors #DIYcircuits #CD4001
June 22, 2025 at 3:46 AM
My issue? The CD4001BE provides voltage but no current (still don’t fully get how that’s possible). It couldn’t turn on my NPN. I used my last inverter so I could drive a PNP instead, now it works!
#electronics #logicgates #transistors #DIYcircuits #CD4001
#electronics #logicgates #transistors #DIYcircuits #CD4001