Batteries Cheap DIY Tech 
Cars That Think
AUGUST 20, 2021
The third essential element of any e-bike is, of course, the battery. Here I took advantage of already owning an electric lawnmower, figuring that the 40-volt, 4-ampere-hour battery I had for it would serve well. Being an open-source design no doubt keeps the price of this hardware down: The controller I bought set me back a mere $85.
Cars That Think
AUGUST 20, 2021
The third essential element of any e-bike is, of course, the battery. Here I took advantage of already owning an electric lawnmower, figuring that the 40-volt, 4-ampere-hour battery I had for it would serve well. Being an open-source design no doubt keeps the price of this hardware down: The controller I bought set me back a mere $85.
Cars That Think
NOVEMBER 26, 2023
But this tech gets you only so far: Noise cancellation works just for relatively low frequencies, and the overall hearing protection that earbuds can offer is also relatively limited. I was on the hunt for another cheap small MEMS mic that could handle louder sound sources. I found the Vesper VM2020 , with an impressive AOP of 149 dB!
Cars That Think
OCTOBER 25, 2022
The biggest leap forward happened in 2012 when it was discovered that USB stick TV tuners using the RTL2832U demodulator chip could be tapped to make very cheap but effective SDR receivers. Building off the demand stimulated by this activity, a number of manufacturers have started making premium, but still relatively cheap, SDRs.
Tony Karrer Delicious EVdriven
APRIL 28, 2009
Well need to spend some more time with the car to find out how it holds up over longer drives, but the powertrain tech obviously works. If you want it to perform like a sports car instead of a slug in a sportscars skin, youre going to need that 10k for the ac drive system alone, and then maybe another 15k for a lithium battery pack.
Expert insights. Personalized for you.
145 
Let's personalize your content