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Forum Index : Microcontroller and PC projects : how do connect the ps/2 keyboard connector to this 2N700
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tenij000 Newbie ![]() Joined: 30/05/2025 Location: NetherlandsPosts: 31 |
dont now how this 2N700 is connected ![]() 3v3 connected to pin 3 ? gp8 connected to pin 1 and 2 pin 3 connected clock |
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Mixtel90![]() Guru ![]() Joined: 05/10/2019 Location: United KingdomPosts: 7889 |
How do you mean? That's a conventional level shifter circuit using a common N-channel mosfet. GP8 - source - pin 1 3V3 - gate - pin 2 PS2 CLK - drain - pin 3 If you look at the mosfet from the top with the flat side towards you the pins are in 1-2-3 order left to right. What you have labelled as pin 2 is wrong. On a mosfet symbol the source is indicated by both what you have labelled as pin 1 and the centre line with the arrow on it. The direction of the arrow shows weather it is N-channel )towards the gate) or P-channel (away from the gate). Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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javavi![]() Guru ![]() Joined: 01/10/2023 Location: UkrainePosts: 496 |
![]() 3v3 connected to pin 2 - GATE GP8 connected to pin 1 - SOURCE CLOCK connected to pin 3 - DRAIN Edited 2025-07-17 20:32 by javavi |
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tenij000 Newbie ![]() Joined: 30/05/2025 Location: NetherlandsPosts: 31 |
like this ![]() |
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stanleyella![]() Guru ![]() Joined: 25/06/2022 Location: United KingdomPosts: 2548 |
https://nl.aliexpress.com/item/32890488553.html? |
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EDNEDN Senior Member ![]() Joined: 18/02/2023 Location: United StatesPosts: 147 |
I have used these exact modules a number of times. They work well, but they do delay the signal noticeably. I had the clock not routed though the converter but the data was routed through the converter. And I could not reliably latch the data. |
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phil99![]() Guru ![]() Joined: 11/02/2018 Location: AustraliaPosts: 2626 |
The 10kΩ pullups are a bit high for speed. On the 3.3V side 1.8kΩ and 2.7kΩ on the 5V side would be better. If that still isn't enough 680Ω and 1kΩ are as low as I would go. |
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