The level of support of an e-bike is normally being set by up-down push buttons. This can often be done with your thumb, without removing your hands off the handlebars, see for instance the Bionx throttle:

Bionx thumb throttle
Bionx thumb throttle

However, such a throttle increases the distance between the grip and the brake lever or shifter. That's why I made a throttle that is mounted on top of the brake lever clamp so that no extra space is needed on the handlebar.

Ergonomic space saving ebike thumb throttle
Ergonomic space saving ebike thumb throttle

I use this throttle for direct speed control, where the speed is increased or decreased in steps by pushing up or down. Since you have to press the buttons very often with speed control, the used SMD Panasonic EVQ-P6DB35 buttons only need a small pressure.

 These are the parts:

DIY e-bike thumb throttle parts
DIY e-bike thumb throttle parts

 This is the throttle with the PCBs glued on it:

IP68 tactile push buttons
IP68 tactile push buttons

 Glue it to the brake lever with 3M VHB tape:

3M VHB tape
3M VHB tape

 Side view:

Ergonomic push button throttle
Ergonomic push button throttle

 The throttle internal wiring:

E bike speed throttle wiring
E bike speed throttle wiring

 

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