MARV’s First Motor Test and Updated mini-PSU
After the previous post and a bit of soldering and waiting for inspiration, my Mom called from the Maplin store across the bridge saying that they were out of stock of LM317Ts and the other branch in Camden had 5 in stock. She insisted on going to Camden to get this but I told her not to bother and to just return home…
I then set about modifying the LM7812 I had and after a bit of tricky soldering and an initial breadboard smoke test, it was up and running perfectly!
An hour later, MARV had his very first motor speed test! You can see the PWM input to the motor as the top (yellow) trace and notice how the duty cycle increases resulting in a higher shaft velocity. The current draw is shown on the bottom trace (in blue) as the voltage across the voltage generating resistor.
- Aye Aye Captain!
- Another Regulated mini-PSU
- Completing MARV…
- MARV Motor Driver V3
- MARV Update…
This was the first 'all' motor test for MARV. There is a problem as my mini-PSU is not able to handle the current draw; therefore, I have ordered a 0-20V/5A bench PSU from Maplin with a couple other ...
I hope to start working on the Motor Driver of MARV on Thursday and due to a nasty inner ear infection find it difficult to get across to the lab at Uni. Therefore, to work from home rather than bu...
I have taken MARV from a simple chassis to what it is currently in 10 days exactly, although a couple days were wasted waiting for components to arrive via the post. The project box currently looks...
This is the CAD/CAM output obtained in gerbv, ...and the completed PCB with one motor driver 'block' soldered on... I hope to begin testing in the morning.....
I hit a serious problem earlier on in the day. I had failed to notice that the PWM5 port on the 18F1330 was sharing the PGD pin and as such after each flashing of the MCU, the 3rd motor would not fun...