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Showing posts from January, 2025

Falstad Audio Amp - working...good applications

012725_AudioAmpUT.txt https://www.youtube.com/watch?v=DtXR7jOm2_s&ab_channel=MusicTechknowledgy excellent UT... need further study of Osc settings This Amp will be used with MP# player

555 asstable falstad

012525_555_Asstable.txt play with R & C for timing also ono Fakstad 012525_555_Mono.txt

Falstad & Mims !

Discovered good use for Mims Falstad great tool to see it working

Electronic Flaser - board using 74595 - impossible solder - need traces - will design 74164 PCB

Not sure its doiable no traces https://www.youtube.com/watch?v=-AtKQSwgnSM&ab_channel=MrElectroUino https://keep.google.com/#NOTE/1Kkyes9LO8UUankBLU2wlgkdD5LiFJFu5iJ348QQtAqpD6o_GBCcv2g4O-keXCuE

555 Monostable - Worked ! about 10 sec on 20uF & 100k... more than 20 uF

off until press button stays on about 10 seconds t= 1.1*R*C 100000*20/10^6 First pass .. didnt work Second attempt.. didnt work (https://www.youtube.com/watch?v=l5LzERjkux0&t=331s&ab_channel=FriendlyWire) T = 1.1 × R × C Where: T = Output pulse width (in seconds) R = Resistance (in ohms) C = Capacitance (in farads) Let's plug in the values: R = 100k = 100,000 ohms C = 20 μF = 20 × 10^-6 farads T = 1.1 × 100,000 × (20 × 10^-6) T = 2.2 seconds

555 BB10 Osc confirms Freq Calc

but, not a square wave... ore sawtooth cap in the BB? Also small RT on LLED was accounted for low voltage on P3 Coofirmed PWM signal on Ars

Knobby Robot

Servo test failed - power or wiring? Powewred servo w 7.2V( v divider used) Wiring from internet-other sourcess?

010925 Wishers Robot - Motor good

tested no shield 12v good PWM doubtful Now to the steering

PCB

 1/7 Been learning EasyPDA PCB Design

Robot

1/9 finally got it working cutting drive time down

EasyEda PCB design& PCB Way for assb !!

 1/6 Home run for design & assb & MANY PreDesigns & they add parts !!

Mims555Timer(126) Falstad

 1/5 Not working? (BTW much easier than Fritzling Subd LED for Relay Pulse also not working

Fritizing ! Discovered

 1/4 useful for Chaser Circuits & more 1/5 Trying Mims Timer circuit 126 Trouble getting 555 connections 

LoRa - testing new modules ( fried old ones?)

 1/1/25 Tried sketch from perplity .. wont load .. correct baud rate 010125loraTestATcommand...