Recent content by mattyboson12

I've rebuilt it on the breadboard and the multimeter looks like it's behaving now! Not sure what happened there! What I'm a bit confused about is when the switch is open I get 2.82V from the output and when it's closed I get 0.63V which was the opposite to what I was expecting. I was expecting...

Thanks dave. So I just realized I ordered 4N32 by accident rather than 4N33 (just re-ordered some) - is one normally closed and the other normally open? However I built it with the 4N32 for the time being. I made the modification to the capacitor routing you mentioned, and then probed between...

So I've tried to build a test version of the circuit- apologies its a bit messy! -powered it with a 3V battery and R1 was 360 ohms (voltage might be a bit low, but wanted to test without a powersupply first) -the 4N33 terminals were in different positions on the datasheet so I had to rearrange...

Thanks dave I'll try both combinations! I've just ordered the parts so while hopefully build it up by the end of this week 🤞. Just to clarify in terms of powering the circuit, would what I've scribbled be the correct way to power it, and is the switch referring to the cutter/tool setter coming...

Hi Dave, if I want to get a 24V output instead, would I simply just drive the circuit using 24V supply instead? Thanks for your help, I really appreciate it!

Thanks all! I'll have a go at building the above circuit this week and will let you know how it goes! :)

I found this circuit online but I was wondering how I could modify it to send a 12V signal rather than lighting the led https://www.homemade-circuits.com/make-this-simplest-continuity-tester/

(tool length)

Just for setting the z height

Yes I'm intending on insulating it from the machining table- having one test point connected to the machining table and the other test point connected to the contact pad of the tool setter. So when the tool contacts the contact pad, it detects the continuity through the machine and issues a 12v...

Apologies I should have explained myself more clearly. I'm trying to build my own tool setter for a CNC router/milling machine so when the cutter contacts the tool setter, an electrical connection is created and then a 12V signal is sent to the machine to record the coordinates of the tool

Hello, I'm a mechanical designer so have limited experience on circuit design. I'm designing a product in my freetime which requires a high speed continuity signal to trigger my system - the faster it is, the more accurate the output so ideally looking at sub 1ms. I'm hoping to power it with a...

Hello, I'm building a homemade continuity tester from the schematic below, and I want to bump up the sensitivity even further so it can detect high resistance objects. What part of the circuit would I have to modify to allow this? Would it be a higher voltage? Thank you Matt

Homework Statement Deriving an s-domain equation for the following inputs a) &b) The Attempt at a Solution I understand how to derive the equation for an input with zero initial conditions (part a) but I'm not sure what to do when there are non-zero initial conditions (part b)

Homework Statement a)Describe a potential laminate lay-up that would exhibit high shear stiffness b)Describe a potential laminate lay-up that would exhibit a low poissons ratio The Attempt at a Solution a) is a unidirectional lay-up in the direction of the shear force best? b) an evenly layup...