#garfield Logs

Feb 18 2020

12:15 AM rue_mohr: https://www.aliexpress.com/item/32829044208.html
12:21 AM rue_mohr: hello idea
12:27 AM rue_mohr: https://www.aliexpress.com/item/32825306048.html
12:27 AM rue_mohr: hmmm more things I can get locally
01:57 AM rue_bed: this week I want to build the 6 phase charge pump
01:57 AM rue_bed: and
01:58 AM rue_bed: make a 25/50Mhz binary discriminator
01:58 AM rue_bed: and a 25/50Mhz fsk gen
09:02 AM rue_mohr: https://www.youtube.com/watch?v=kIcaX2zdTko
09:02 AM rue_mohr: that looks like what you were talking about tom
01:16 PM Tom_L: pretty nice build
01:38 PM polprog: bck home
01:38 PM polprog: back*
03:47 PM polprog: hmm. 2ns propagation delay and rise time on the 74ac04
04:34 PM polprog: i got 5.5ns pulses!!
06:25 PM polprog: https://i.ibb.co/8dy2xz6/5nanosec-trace.png
07:00 PM rue_mohr: nice
07:01 PM rue_mohr: whats the propigation delay of a 74xx86?
07:30 PM rue_mohr: ok
07:30 PM rue_mohr: so I have two pedals
07:30 PM rue_mohr: one for forward the other for back
07:31 PM rue_mohr: the forward pedal will modify the speed value from 0 -> 255, and the backward one from 0 -> -255
07:31 PM Tom_L: :)
07:31 PM rue_mohr: then the way they fight makes sense
07:32 PM rue_mohr: I need ADC code for an atmega8
07:33 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/avr/adc_test/
07:34 PM rue_mohr: OOoo..
07:34 PM rue_mohr: atmega8?
07:34 PM Tom_L: 48 etc but should be damn close
07:34 PM rue_mohr: hmmm
07:34 PM rue_mohr: the 328 registers were completely different
07:37 PM Tom_L: http://www.robotplatform.com/knowledge/ADC/adc_tutorial_4.html
07:39 PM rue_mohr: chewing...
07:39 PM Tom_L: me too... late dinner brb
07:40 PM Tom_L: they didn't get her car done til 5pm... finally took delivery of it
07:41 PM rue_mohr: .. again?
07:42 PM rue_mohr: how many tines that thing need to be worked on?
07:46 PM Tom_L: they were putting parts on but they didn't have them so they kept it since the 14th
07:46 PM Tom_L: the boys each got one too
07:47 PM rue_mohr: a car or a part of it?
07:54 PM Tom_L: she added some accessories they ordered so they kept the car until they came in
07:56 PM Tom_L: and the boys each got a car
10:07 PM rue_mohr: oh new car?
10:07 PM rue_mohr: electric or diesel?
10:07 PM Tom_L: gas
10:07 PM rue_mohr: ouch$
10:08 PM Tom_L: naw
10:08 PM Tom_L: diesel is marked up to where there's not much difference
10:08 PM rue_mohr: maybe not now as much as in 5 years
10:08 PM rue_mohr: yea damn, its 8pm
10:08 PM Tom_L: we'll just overtake another country if we need more
10:08 PM rue_mohr: I figured that would happen if I took a nap
10:09 PM Tom_L: yeah this was for the most part an unproductive day
10:09 PM rue_mohr: I got the code
10:09 PM rue_mohr: I can go test with pots
10:09 PM rue_mohr: dunno if I have time to sort out connectors
10:09 PM Tom_L: code from the link?
10:09 PM rue_mohr: a bit from eveywhere
10:10 PM rue_mohr: I set it up as irq circle that updates an array
10:10 PM Tom_L: if it's been written once, no need to re'invent it
10:10 PM rue_mohr: its based on some of my other code, with adjustments
10:11 PM rue_mohr: its funny, the motor pulls 36mA
10:11 PM rue_mohr: I feel like I could power it from anything
10:12 PM rue_mohr: I'm gonna power this thing with 12V, and boost it up to 24 for the motor
10:12 PM rue_mohr: (chineese dc-dc_
10:12 PM rue_mohr: step it down for the avr (chineese dc-dc)
10:12 PM Tom_L: you got alot of faith in the chinese
10:13 PM rue_mohr: not many failures so far
10:13 PM rue_mohr: I blow more things up with my mistakes than otherwise
10:13 PM rue_mohr: I have had a few faulty chips, but, I cant really complain for the price can I?
10:18 PM Tom_L: no
10:18 PM Tom_L: i popped a couple of their buck regulators but it was probably my own fault
10:20 PM rue_shop1: yep, I think for the price, the quality is fine
10:33 PM rue_shop1: oops, help if I turn on the adc
11:19 PM rue_mohr: ok! it working
11:33 PM rue_mohr: one pedal increases the forward speed, the other increases the reverse speed, the net is the difference between them
11:41 PM rue_mohr: however, my digit changer code is going awol