Search found 4 matches

by klf
28 Jul 2020, 12:36
Forum: Hardware and software hacking
Topic: Issue with building my own Pluppy McPlugface
Replies: 14
Views: 370

Re: Issue with building my own Pluppy McPlugface

USB keyboards from the transition time, when PS/2 was still common, often support both protocols. Newer ones do not. If your USB keyboard came with a green PS/2 adapter it should work. If no adapter was included it is unlikely that this protocol has been implemented.
by klf
23 Jul 2020, 11:31
Forum: Hardware and software hacking
Topic: Raspberry pi loader
Replies: 14
Views: 2507

Re: Raspberry pi loader

So the first thing to do is to wire up the RPi's GPIO header to a female DB9 connector. You will need some sort of multi-conductor cable with at least 4 unique wires, (I would personally use a strip of ribbon cable for testing purposes and then clean it up later once it's running). Be careful, the ...
by klf
18 Jun 2020, 18:50
Forum: Hardware and software hacking
Topic: PucMon
Replies: 23
Views: 2121

Re: PucMon

This is the access time rating. You will need 150ns or faster. So all three versions should work.
by klf
09 May 2019, 22:22
Forum: Hardware and software hacking
Topic: Oscillator with 50% duty
Replies: 3
Views: 1032

Re: Oscillator with 50% duty

You should use 74HCU04 for an oscillator, not 74HC04. A 74HC04 actually consists of three inverters in a row, therefore it cannot be biased into linear mode (that's what the 1Meg resistor does).