Old com system
Old com system
AVR recycling
AVR recycling
Dangling intelligence
Dangling intelligence
Still driving to Copenhagen
20 Swedish Kronor Bill
Frederiks Kirke
Still driving back home
Copenhagen Harbour
A "let me cross the water" building
A sunset
Børsen
Vor Frelsers Kirke
Near Copenhagen "Kastellet"
A sunset
Indoor Skiing
Copenhagen Canal Tour
Malmö Parking Ticket
A sunset
Bridge again
Copenhagen Canal Tour
Knock sensor waveforms
Knock sensor waveforms
Makeshift workbench
Knock sensor + amp
Knock sensor + amp
Knock knock
Knock knock
Knock knock
New batch of boards
RGB LED Ring - V1.21
RGB LED Ring - V1.21 front side
White Wagtail
Scarlet Minivet
Red-whiskered Bulbul
Roseate Tern
TI-85 magically fixed ;-)
TI-89
TI-89
TI-89 front cover
TI-85
TI-89 backcover removed
TI-85 2 dead lines :-(
Keywords
Authorizations, license
-
Visible by: Everyone -
All rights reserved
-
161 visits
Knock knock
As the 8pin LM2940 op-amp is a dual amp, I've distributed the amplification to both amps. The first stage still adds an offset and has adjustable amplification, the 2nd stage is a fixed at a factor of 11. I've also added a low-pass filter at the output to smooth the signal some more. C5 was added for AC coupling and must be at least as big as C1. D2 was added to allow C5 to be discharged and be ready for the next pulse.
- Keyboard shortcuts:
Jump to top
RSS feed- Latest comments - Subscribe to the comment feeds of this photo
- ipernity © 2007-2024
- Help & Contact
|
Club news
|
About ipernity
|
History |
ipernity Club & Prices |
Guide of good conduct
Donate | Group guidelines | Privacy policy | Terms of use | Statutes | In memoria -
Facebook
Twitter
Sign-in to write a comment.