Kleines Helferlein

@raph1
10 Followers
21 Following
29 Posts
Ich bin ein bastelnder Elektroingenieur - privat gehe ich an alles. Stahl, Holz, rund ums Haus usw. usf.
So werden Brunnen gebaut und Motorräder repariert. Es wurden verrückte Mechaniken im Haus gebaut und überall blinkt irgend eine Elektronik :) Kurz: Nerdiger Tekki #DIY #IoT #electronics #nerd #maker #3Dprint #elektronik #Mikrocontroller #entwicklung #arduino #8bit #esp32
Los geht's.... Schwupp sind 6m stahl klein. Nun "nur noch" schweißen.
It changes the Pens again... now everything is done and ready for next 40 years #penplotter #retrocomputing #repair #electronics #diy

Somebody a idea what's happend here? On all solderjoints white something like powder. Pcb is from 1989

#diy #repair #retrocomputing #solder

No it doesn't work... damn.

The Motors are DC Brushed Servos driven by a Darlinton BJT H-Bridge with TIP100/105. One BJT was burned and i replaced them with TIP130/135. But the same Transistor died. I replaced the Wire and then add some 2R2 Resistors into the Motor Lines. While Printing the Voltage across one Resistor reach up to 2V at 60cms/2g (less then 1A). After a while i got axis error even if i run slower.
The ULN Driver (see Pics) seems to work fine - but i have no glue what to do...

Some softwarestuff Tool du But Hardware works. I think I need to tweak my vpype command.
I hope its done now.... New driverstage for dc servo and reworked motorcable. Now I fix a Mechanic failure and then the reassembly begin :)
Los geht's... DHBW Stuttgart - Gastvortrag zum Boost Converter #elektronik #dhbw
Guten Morgen...
und was Spricht euer Haus so mit euch? :) #IoT #FHEM #homeautomation #smarthome #esp32 #esp
Next old Hardware to fix.... Encad SP2800 A0 Pen Plotter #80s #retrocomputer #electronics #repair