Smash Drive is a DIY classic built around the LM386. This is a great sounding project that is easy to build with just a few easy to find parts.
PCB
Order boards through the PCBWay shared projects page. PCBWay.com provides excellent quality boards at very competitive prices.
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/67F804AF-0C08-439F-B6AA-2241BB029DE5-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/CD88F22D-88AE-469F-B7DF-87BC3D35F97C-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/5A6C48AD-0103-4396-998A-FD1235ACB692-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/88DBEFCC-99FF-4705-875D-9FB31F7DEED7-scaled.jpeg?resize=1440%2C1920)
Parts List
Part Number | Value |
R1 | 1M (Tayda, Stompboxparts) |
R2 | 470K (Tayda, Stompboxparts) |
R3 | 1r (Tayda, Stompboxparts) |
R4 | 22K (Tayda, Stompboxparts) |
R5 | 100r (Tayda, Stompboxparts) |
RLED 1 | 1K-10K (Tayda, Stompboxparts) |
C1 | 100µ (Tayda, Stompboxparts) |
C2 | 22µ (Tayda, Stompboxparts) |
C3 | 47µ (Tayda, Stompboxparts) |
C4 | 47µ (Tayda, Stompboxparts) |
C5 | 10n (Tayda, Stompboxparts) |
C6 | 4n7 (Tayda, Stompboxparts) |
C7 | 100n (Tayda, Stompboxparts) |
VOLUME | B500K 9mm (Tayda, Stompboxparts) |
GAIN 2 | B500r 9mm (Tayda, Stompboxparts) |
IC1 3 | LM386 (Tayda, Stompboxparts) |
D1 | LED (Tayda, Stompboxparts) |
Enclosure 4 | 1590B (Tayda, Stompboxparts, LoveMySwitches) |
- [1] Any value from 1 – 10k works here. This is a current limiting resistor for the LED. smaller values make the LED brighter.
- [2] If you can’t find a 500r pot you can use a 1k instead.
- [3] Get a socket for this. Always a good idea in case something goes wrong and you need to replace this.
- [4] This will fit in almost any enclosure, I planned the PCB to fit a 1590B, but you could use anything you have on hand.
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/04/Smash-Drive-Schem.png?resize=1096%2C730)
I used 9mm pots when I designed the board. After ordering the boards I realized I couldn’t source a 500r pot from Tayda. If you have problems sourcing this value you can use 1K pot and bridge legs 1 and 3 with a 1K resistor. This worked for me. See the images below.
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/D6C8F8DF-035A-4B88-B203-6ADA4FDA0648-scaled.jpeg?resize=1440%2C1920)
Drill your enclosure
Use this drill guide. Be sure to print the drill guide at 100%.
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/D559D978-2678-459C-99BA-4F399089BA9C-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/C99514B7-BFA4-4846-A543-B3DEAFDC04AB-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/87CD38D9-5D21-4CB9-ACED-ACC46E333205-scaled.jpeg?resize=1440%2C1920)
Wire it up
Follow the wiring guide.
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/Smash-Drive-Wiring.png?resize=342%2C638)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/7DCE26A0-EF8E-420D-8EA4-830BD2288B8E-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/7EB47415-91B9-4BFE-A7AC-BC5ED6B92E41-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/D559D978-2678-459C-99BA-4F399089BA9C-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/3F035431-EBB0-4799-8566-B136713D66BC-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/C99514B7-BFA4-4846-A543-B3DEAFDC04AB-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/CD88F22D-88AE-469F-B7DF-87BC3D35F97C-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/5A6C48AD-0103-4396-998A-FD1235ACB692-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/83AC208C-D8B9-4948-82ED-1206A9A3474E-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/88DBEFCC-99FF-4705-875D-9FB31F7DEED7-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/7EB47415-91B9-4BFE-A7AC-BC5ED6B92E41-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/7DCE26A0-EF8E-420D-8EA4-830BD2288B8E-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/87CD38D9-5D21-4CB9-ACED-ACC46E333205-scaled.jpeg?resize=1440%2C1920)
![](https://i0.wp.com/www.super-freq.com/wp-content/uploads/2022/03/B769770B-5809-4B6C-9DD1-D404BFC06F7F-scaled.jpeg?resize=1440%2C1920)